heat exchanger Archives - Page 2 of 4 - UNITED HEAT EXCHANGER

Jun 27
0

Removable Tube Sheet Heat Exchangers

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Removable Tube Sheet Heat Exchangers Manufacturer INDIA

Tube removal is a process that involves cutting tubes, pulling out tubes and tube stubs, and even knocking tubes out of the vessel. You can look to Elliott for all your tube removal needs ranging from tube cutters to tube tuggers to pneumatic hammers.The tube removal process includes several process steps that must be performed with critical sequencing and tolerances. The initial step of our process is the Tungsten Inert Gas (TIG) shrinking of the tube to-tube sheet expansion joints where applicable, which is performed with our standard plug removal TIG system.

 

Specifications :

  • The TIG process is carefully monitored for power and travel so that only designated areas in the tube are shrunk. For some tubes with minimal tube sheet contact, shrinking is not required.

Applications :

  • Tube Removers-One or a combination of the three below methods is used to remove a tube from a boiler or chiller vessel
  • Tube Cutters- Tube Cutters are used to internally cut from the inside to the outside of the tube behind the tube sheet on one end. This lessens the force required to pull a tube. To eliminate tube cutting chips in the vessel, tubes should be scored and not totally cut through. The tube cutter needs to have sufficient reach to cut behind the tube sheet. Proper lubrication and cutting speed will increase cutting blade life.
  • Tube Pullers- Used to break the seal and pull expanded tubes from a tube sheet. A spear or expanding collet is inserted and engaged into the tube inner diameter. A ram or gun applies force to exert an extracting force on the tube. The power to pull the tube is generated manually or through an hydraulic pump. The hydraulic pump can be manually, electrically or pneumatically driven. The pulling force required will vary with the tube size and wall, the depth of the tube sheet and tube material.
  • Pneumatic Hammers-Pneumatic Hammers are an alternative method to remove tube stubs from heat exchangers and boilers. Maintenance technicians use piloted knockout tools to avoid damage to the tube sheet. The knockout tool is inserted into the tube and the impact pneumatic hammer is actuated to punch out the tube stub.
  • Tube Installation (Tube Expanders)- Tube Expanding is the art of reducing a tube wall by compressing the outer diameter of the tube against a fixed container such as rolling tubes into tube sheets, drums, ferrules or flanges. Construction of heat exchangers, boilers, and surface condenser tubes is mainly limited to copper, steel, stainless steel, and cast iron with exceptions such as the use of titanium in ultra high pressure vessel applications. To assure a proper tube joint, the tube wall must be reduced by a predetermined percentage dependent upon the material the tube is constructed

Advantages :

  • Hard rolled and tubes the shrinking process is necessary to relieve the radial stress between the tube and tube sheet.

Removable Tube Sheet Heat Exchangers Manufacturer INDIA

Heat Exchanger Manufacturers INDIA

Removable Tube Sheet Heat Exchangers

Jun 27
0
Pressure Vessel Heat Exchanger Manufacturers

Pressure Vessel Heat Exchanger

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pressure vessels

pressure vessels

A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.

Pressure Vessel

Pressure Vessels

The pressure differential is dangerous and many fatal accidents have occurred in the history of pressure vessel development and operation. Consequently, pressure vessel design, manufacture, and operation are regulated by engineering authorities backed by legislation. For these reasons, the definition of a pressure vessel varies from country to country, but involves parameters such as maximum safe operating pressure and temperature.

Pressure Vessels Manufacturers

Pressure Vessels

More complicated shapes have historically been much harder to analyze for safe operation and are usually far more difficult to construct.

 

Theoretically, a spherical pressure vessel has approximately twice the strength of a cylindrical pressure vessel.[1] However, a spherical shape is difficult to manufacture, and therefore more expensive, so most pressure vessels are cylindrical with 2:1 semi-elliptical heads or end caps on each end. Smaller pressure vessels are assembled from a pipe and two covers. A disadvantage of these vessels is that greater breadths are more expensive, so that for example the most economic shape of a 1,000 litres (35 cu ft), 250 bars (3,600 psi) pressure vessel might be a breadth of 914.4 millimetres (36 in) and a width of 1,701.8 millimetres (67 in) including the 2:1 semi-elliptical domed end caps.

 

Specifications :

  • Pressure vessels can theoretically be almost any shape, but shapes made of sections of spheres, cylinders, and cones are usually employed.
  • A common design is a cylinder with end caps called heads. Head shapes are frequently either hemispherical or dished (torispherical).

Applications :

  • Pressure vessels are diving cylinders, recompression chambers, distillation towers, autoclaves, and many other vessels in mining operations, oil refineries and petrochemical plants, nuclear reactor vessels, submarine and space ship habitats, pneumatic reservoirs, hydraulic reservoirs under pressure, rail vehicle airbrake reservoirs, road vehicle airbrake reservoirs, and storage vessels for liquified gases such as ammonia, chlorine, propane, butane, and LPG.

Advantages :

  • Pressure vessels are used in a variety of applications in both industry and the private sector.
  • They appear in these sectors as industrial compressed air receivers and domestic hot water storage tanks.

Pressure Vessel Heat Exchanger INDIA

Pressure Vessel Heat Exchanger

Jun 27
0
Plate Type Heat Exchanger Manufacturers

Plate Type Heat Exchanger

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Plate Type Heat Exchangers

Plate Type Heat Exchanger

A plate type heat exchanger is a type of heat exchanger that uses metal plates to transfer heat between two fluids. This has a major advantage over a conventional heat exchanger in that the fluids are exposed to a much larger surface area because the fluids spread out over the plates. This facilitates the transfer of heat, and greatly increases the speed of the temperature change. It is not as common to see plate heat exchangers because they need well-sealed gaskets to prevent the fluids from escaping, although modern manufacturing processes have made them feasible.

Plate Type Heat Exchanger Manufacturer India

Plate Type Heat Exchangers

The concept behind a heat exchanger is the use of pipes or other containment vessels to heat or cool one fluid by transferring heat between it and another fluid. In most cases, the exchanger consists of a coiled pipe containing one fluid that passes through a chamber containing another fluid. The walls of the pipe are usually made of metal, or another substance with a high thermal conductivity, to facilitate the interchange, whereas the outer casing of the larger chamber is made of a plastic or coated with thermal insulation, to discourage heat from escaping from the exchanger. The plate heat exchanger (PHE) was invented by Dr Richard Seligman in 1923 and revolutionized methods of indirect heating and cooling of fluids.

Plate Type 'Heat Exchangers

Plate Type ‘Heat Exchanger

Plate type heat exchanger one is composed of multiple, thin, slightly-separated plates that have very large surface areas and fluid flow passages for heat transfer. This stacked-plate arrangement can be more effective, in a given space, than the shell and tube heat exchanger. Advances in gasket and brazing technology have made the plate-type heat exchanger increasingly practical. In HVAC applications, large heat exchangers of this type are called plate-and-frame; when used in open loops, these heat exchangers are normally of the gasket type to allow periodic disassembly, cleaning, and inspection. There are many types of permanently-bonded plate heat exchangers, such as dip-brazed and vacuum-brazed plate varieties, and they are often specified for closed-loop applications such as refrigeration. Plate heat exchangers also differ in the types of plates that are used, and in the configurations of those plates. Some plates may be stamped with “chevron” or other patterns, where others may have machined fins and/or grooves.

 

Specifications :

  • Liquid foods such as milk, fruit juices, beers, wines, and liquid eggs are pasteurized using plate-type heat exchangers.
  • Wine and fruit sjuices are normally deaerated prior to pasteurization in order to remove oxygen and minimize oxidative deterioration of the products.
  • Plate-type heat exchangers consist of a large number of thin, vertical steel plates that are clamped together in a frame.

Applications :

  • The plates produce an extremely large surface area, which allows for the fastest possible transfer.
  • Making each chamber thin ensures that the majority of the volume of the liquid contacts the plate, again aiding exchange.
  • The troughs also create and maintain a turbulent flow in the liquid to maximize heat transfer in the exchanger.
  • A high degree of turbulence can be obtained at low flow rates and high heat transfer coefficient can then be achieved.

Advantages :

  • Easy maintenance and suitable for CIP, plate pack easily accessible
  • High heat transfer coefficients
  • Flexibility to change plate arrangement and to add or remove plate
  • No mixing of product
  • Compact constructions
  • Optimized heat recovery

Plate Heat Exchangers Manufacturer INDIA

Plate Type Heat Exchanger

Jun 27
0
Plate Type Heat Exchanger Manufacturers

Plate Finned Type Heat Exchanger

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Plate Type Heat Exchangers

Plate Type Heat Exchangers

We are the leading manufacturers of Plate finned type Heat Exchanger in India.A plate-fin heat exchanger is a type of heat exchanger design that uses plates and finned chambers to transfer heat between fluids. It is often categorized as a compact heat exchanger to emphasise its relatively high heat transfer surface area to volume ratio. The plate-fin heat exchanger is widely used in many industries, including the aerospace industry for its compact size and lightweight properties, as well as in cryogenics where its ability to facilitate heat transfer with small temperature differences is utilized.Plate-fin heat exchangers are generally applied in industries where the fluids have little chances of fouling. The delicate design as well as the thin channels in the plate-fin heat exchanger make cleaning difficult or impossible.

Plate finned type Heat Exchanger Manufacturer INDIA

Description:-

A plate-fin heat exchanger is made of layers of corrugated sheets separated by flat metal plates, typically aluminium, to create a series of finned chambers. Separate hot and cold fluid streams flow through alternating layers of the heat exchanger and are enclosed at the edges by side bars. Heat is transferred from one stream through the fin interface to the separator plate and through the next set of fins into the adjacent fluid. The fins also serve to increase the structural integrity of the heat exchanger and allow it to withstand high pressures while providing an extended surface area for heat transfer.

A high degree of flexibility is present in plate-fin heat exchanger design as they can operate with any combination of gas, liquid, and two-phase fluids. Heat transfer between multiple process streams is also accommodated,with a variety of fin heights and types as different entry and exit points available for each stream.

Specifications :

  • The main four type of fins are: plain, which refer to simple straight-finned triangular or rectangular designs; herringbone.
  • Where the fins are placed sideways to provide a zig-zag path and serrated and perforated which refer to cuts and perforations in the fins to augment flow distribution and improve heat transfer.

Applications :

  • Natural gas liquefaction
  • Cryogenic air separation
  • Ammonia production
  • Offshore processing
  • Nuclear engineering
  • Syngas production

Advantages :

  • High thermal effectiveness and close temperature approach. (Temperature approach as low as 3K between single phase fluid streams and 1K between boiling and condensing fluids is fairly common.),
  • Large heat transfer surface area per unit volume (Typically 1000m2/m3),
  • Low weight,
  • Multi-stream operation (Up to ten process streams can exchange heat in a single heat exchanger.), and
  • True counter-flow operation (Unlike the shell and tube heat exchanger, where the shell side flow is usually a mixture of cross and counter flow.).

Heat Exchanger Manufacturers INDIA

Plate Finned Type Heat Exchanger

Jun 27
0
Oil Cooler Manufacturers

Oil Coolers

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Oil Coolers Manufacturers

Oil Cooler

Oil cooling refers to a process whereby heat is displaced from a ‘hotter’ object, into a cooler oil and is the principle behind oil cooler devices. The oil carrying the displaced heat usually passes through a cooling unit such as a radiator or less commonly a gas decompresser. The cooled oil repeats this cycle, to continuously remove heat from the object.An assembly for cooling oil in the lubrication system of an internal combustion engine. Oil coolers are installed mainly in motor vehicles, whose engines often operate under difficult thermal conditions. Oil coolers may be of the air-cooled or water-cooled type. The air-cooled oil cooler consists of brass tubing to which cooling fins are soldered. The oil circulated in the tubing by the oil pump is cooled by air when the vehicle is in motion. The oil cooler is connected to the lubrication system in parallel with the main oil pressure line. The cooled oil is returned to the crankcase of the engine.

 

We are proud to introduce ourselves as one of the leading Industrial Oil Cooler Manufacturers from India. We have outstanding information and communication technologies that have made us one of the top notch air Oil Cooler and engine oil cooler manufacturers in India. Our hi-tech plant and use of best quality raw materials help us to generate oil cooler that are industry benchmark of innovation and quality. We are flawless in our efforts to provide uninterrupted services to our clients and this hade made us one of the revered oil cooler exporters from India.

 

Specifications :

  • Oil cooler can be connected to through hoses to the high-performance blocks by removing the plugs above the oil filter pad.
  • It also contributes to lowering the engine-temperature. Of the three engine cooling systems, oil cooling is the most promising for getting big cooling gains with relatively little effort. It is necessary to keep the temperature of the oil, needed for the functioning of the engine and its subsystems, under control. Too high temperatures lead to a rapid degradation of the oil’s lubrication characteristics with the risk of damaging mechanical parts.
  • They may be designed to exchange heat between oil and air rather than oil and the coolant in the engine cooling circuit.
  • The latter involves simplified oil circuits and low costs if compared to the oil-air solutions, which offer higher performances and do not imply an additional thermal load for the radiator.

Applications :

  • An oil cooler is a separate, smaller radiator from an engine’s main radiator, which maintains an oil supply at a consistent, optimal temperature.
  • Broadly put, lower oil temperatures prolong the life of an engine or transmission.
  • An oil cooler can play an important role in the smooth running of a vehicle by dissipating heat while transporting oil away from moving parts into the oil pan.
  • The optimum temperature for oil is between 180 and 200 degrees Fahrenheit.
  • Failures start to occur when oil cannot dissipate its collected heat fast enough and rises past this threshold.
  • As it begins to break down, oil loses its lubricating, as well as its cooling, properties.
  • While a majority of cars are not manufactured with proprietary engine oil coolers, there is a large aftermarket for them, and they are common accessories in vehicles involved in towing and other heavy-duty applications.
  • Oil cooling kits exist for both motors and automatic transmissions.
  • In engines, oil not only functions as a lubricant but also as the coolant for a number of parts.
  • A motor’s bottom end, which includes parts such as the crankshaft, bearings, camshaft, rods, and pistons, is cooled only by engine oil.

Advantages :

  • Oil has a higher boiling point than water, so it can be used to cool items 100°C or higher.
  • Oil is an electrical insulator; thus, it can be used inside of or in direct contact with electrical components.

Oil Coolers Heat Exchangers Manufacturer INDIA

Heat Exchanger Manufacturers INDIA

Oil Coolers

Jun 27
0
Marine Heat Exchanger Manufacturers

Marine Heat Exchanger

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Marine Heat Exchangers Manufacturer INDIA

Marine Heat Exchanger Manufacturers

Marine Heat Exchangers

Marine heat exchangers are the most common way to cool a boat’s engine, using the lake, river or ocean water in which the boat floats. Since this water may be corrosive the engine may be cooled by a sealed mixture of distilled water and antifreeze. Heat from the water-antifreeze mixture is then transferred to the ocean (or lake or river) water which flows into a heat exchanger. The water-antifreeze mixture runs through the heat exchanger dumping heat, but remaining separate from corrosive salts and chemicals found in the water the boat is floating in. If the ocean water eventually corrodes and ruins the heat exchanger it can be replaced at a fraction of the cost of replacing the engine. To protect the marine heat exchanger from corrosive salts, a sacrificial zinc anode is screwed into the heat exchanger. This anode must be periodically replaced as part of regular maintenance. Because the water the boat floats in may be contaminated with floating particles such as wood or styrofoam balls the well designed boat will have a filter (often stainless steel mesh) to remove these particles before they are moved toward the heat exchanger. This filter must be periodically cleaned or else the flow of water to the heat exchanger will become obstructed and the engine will overheat.

 

Marine Uses:-

A water-jacketed exhaust manifold is necessary on marine engines to reduce the temperature of the engine-room air space and the exhaust pipe. If the exhaust manifold is in the sea-water circuit it should be installed with the sea-water inlet at the back and the outlet at the front on the top to ensure that it operates completely full of sea-water. If the manifold is in the fresh-water circuit a small by-pass hole must be provided in the thermostat to ensure that some water is circulating through the manifold at ail times.

Our development is to combine a water jacketed exhaust manifold with the heat exchanger and header tank. This arrangement is particularly suitable for small series-produced engines; the manifold is cooled by fresh water and as a result a keel-cooled engine can be made by omitting the heat exchanger tube stack and the sea-water pump. On installation the fresh-water outlet from the manifold would be connected to the keel pipes and the return taken back to the engine fresh-water pump. Heat exchanger/manifold assemblies are heavier than ordinary marine manifolds and must therefore be supported on the underside using the fixing lugs provided.

When automotive engines are being converted for marine use the existing centrifugal-type pump should be retained for the fresh-water circuit and an additional pump fitted for the sea-water circuit. The sea water pipe bore should be chosen so that the velocity does not exceed 2 m/sec on the suction side and 3 m/sec on the discharge side of the pump.

Specifications :

  • Large ships usually carry evaporating plants to produce fresh water, thus reducing their reliance on shore-based supplies. Steam ships must be able to produce high quality distillate in order to maintain boiler-water levels.
  • Diesel engined ships often utilise waste heat as an energy source for producing fresh water. In this system, the engine cooling water is passed through a heat exchanger, where it is cooled by concentrated sea water.
  • Because the cooling water (which is chemically treated fresh water) is at a temperature of 70-80 degrees C, it would not be possible to flash off any water vapour unless the pressure in the heat exhanger vessel was dropped.
  • Partial evaporation is achieved and the vapour passes through a demister before reaching the condenser section. Sea water is pumped through the condenser section to cool the vapour sufficiently to precipitate it.

Applications :

  • The distillate gathers in a tray, from where it is pumped to the storage tanks.
  • A Salinometer monitors salt content and diverts the flow of distillate from the storage tanks if the salt content exceeds the alarm limit. Sterilisation is carried out after the evaporator. Evaporators are usually of the shell-and-tube type (known as an Atlas Plant or of the Plate Type such as the type designed by Alfa Laval.
  • Temperature, production and vacuum are controlled by regulating the system valves.
  • Sea water temperature can interfere with production, as can fluctuations in engine load.
  • For this reason, the evaporator is adjusted as seawater temperature changes, and shut down altogether when the ship is manoeuvring.

Advantages :

  • An alternative in some vessels, such as naval ships and passenger ships, is the use of the Reverse Osmosis principle for fresh water production instead of evaporators.
  • If the engine is being used to drive auxiliary equipment in a ship and the sea water supply is taken from the ship’s main, ensure that the recommended flow rate cannot be exceeded.
  • To alleviate this problem, a brine-air ejector venturi is used to create a vacuum inside the vessel.

Marine Heat Exchangers Manufacturer INDIA

Marine Heat Exchanger

Jun 27
0
Kettle Reboiler Type Heat Exchanger Manufacturers

Kettle Reboiler Type Heat Exchanger

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Kettle Reboiler Heat Exchanger

Kettle Reboiler Type Heat Exchanger

Kettle Reboiler Type Heat Exchanger Manufacturer INDIA

Kettle reboilers are very simple and reliable. They may require pumping of the column bottoms liquid into the kettle, or there may be sufficient liquid head to deliver the liquid into the reboiler. In this reboiler type, steam flows through the tube bundle and exits as condensate. The liquid from the bottom of the tower, commonly called the bottoms, flows through the shell side. There is a retaining wall or overflow weir separating the tube bundle from the reboiler section where the residual reboiled liquid (called the bottoms product) is withdrawn, so that the tube bundle is kept covered with liquid.Kettle reboilers are reliable in that they can handle high vaporization of up to 80 percent and are easy to maintain. The liquid from the bottom of the tower flows through the tube bundle and exits as condensate. A restraining device (baffle) controls the liquid level over the bundle.

Kettle Reboiler Heat Exchangers

Kettle Reboiler Heat Exchanger

Specifications :

  • Proper reboiler operation is vital to effective distillation. In a typical classical distillation column, all the vapor driving the separation comes from the reboiler. The reboiler receives a liquid stream from the column bottom and may partially or completely vaporize that stream. Steam usually provides the heat required for the vaporization.

Applications :

  • The high level of vaporization makes it prone to fouling, and these reboilers are expensive due to their large shell size and maintenance.

Advantages :

  • Reboilers are heat exchangers typically used to provide heat to the bottom of industrial distillation columns.
  • They boil the liquid from the bottom of a distillation column to generate vapors which are returned to the column to drive the distillation separation.

Kettle Reboiler Type Heat Exchanger Manufacturer INDIA

Heat Exchanger Manufacturers INDIA

Kettle Reboiler Type Heat Exchanger

Jun 27
0

Flue Gas Air Preheater

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Flue Gas Air Pre Heater Manufacturer INDIA

An air preheater (APH) is a general term to describe any device designed to heat air before another process (for example, combustion in a boiler) with the primary objective of increasing the thermal efficiency of the process. They may be used alone or to replace a recuperative heat system or to replace a steam coil.

 

In particular, this article describes the combustion air preheaters used in large boilers found in thermal power stations producing electric power from e.g. fossil fuels, biomasses or waste.

 

The purpose of the air preheater is to recover the heat from the boiler flue gas which increases the thermal efficiency of the boiler by reducing the useful heat lost in the flue gas. As a consequence, the flue gases are also sent to the flue gas stack (or chimney) at a lower temperature, allowing simplified design of the ducting and the flue gas stack. It also allows control over the temperature of gases leaving the stack.

 

Types:-

There are two types of air preheaters for use in steam generators in thermal power stations: One is a tubular type built into the boiler flue gas ducting, and the other is a regenerative air preheater.These may be arranged so the gas flows horizontally or vertically across the axis of rotation.

Another type of air preheater is the regenerator used in iron or glass manufacture.

 

Tubular type:-

Tubular preheaters consist of straight tube bundles which pass through the outlet ducting of the boiler and open at each end outside of the ducting. Inside the ducting, the hot furnace gases pass around the preheater tubes, transferring heat from the exhaust gas to the air inside the preheater. Ambient air is forced by a fan through ducting at one end of the preheater tubes and at other end the heated air from inside of the tubes emerges into another set of ducting, which carries it to the boiler furnace for combustion.

 

Regenerative air preheaters:-

The rotating-plate design (RAPH)consists of a central rotating-plate element installed within a casing that is divided into two (bi-sector type), three (tri-sector type) or four (quad-sector type) sectors containing seals around the element. The seals allow the element to rotate through all the sectors, but keep gas leakage between sectors to a minimum while providing separate gas air and flue gas paths through each sector.

Tri-sector types are the most common in modern power generation facilities.In the tri-sector design, the largest sector (usually spanning about half the cross-section of the casing) is connected to the boiler hot gas outlet. The hot exhaust gas flows over the central element, transferring some of its heat to the element, and is then ducted away for further treatment in dust collectors and other equipment before being expelled from the flue gas stack. The second, smaller sector, is fed with ambient air by a fan, which passes over the heated element as it rotates into the sector, and is heated before being carried to the boiler furnace for combustion. The third sector is the smallest one and it heats air which is routed into the pulverizers and used to carry the coal-air mixture to coal boiler burners.
The rotor itself is the medium of heat transfer in this system, and is usually composed of some form of steel and/or ceramic structure.

 

Specifications :

  • The total air heated in the RAPH provides: heating air to remove the moisture from the pulverised coal dust, carrier air for transporting the pulverised coal to the boiler burners and the primary air for combustion.

Applications :

  • It rotates quite slowly around 3-5 RPM to allow optimum heat transfer first from the hot exhaust gases to the element, then as it rotates, from the element to the cooler air in the other sectors.

Advantages :

  • Air pre-heater transfer heat from flue gas to air by means of a rotary matrix in which heat is absorbed by the heating elements passing through the hot gas stream and transferred to the combustion air stream.

Flue Gas Air Preheater

Jun 27
0

Fixed Tube Sheet Heat Exchangers

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Fixed Tube Sheet Heat Exchangers Manufacturer INDIA

A Fixed Tube Sheet heat exchanger is the most common type of heat exchanger in all Industries. Mostly used in higher-pressure and Higher Temperature applications.

 

Fixed Tube Sheet Heat Exchangers are the one that are very much used in process chemical industries and refinery services, as there is absolutely no chance for intermixing of fluids. This type of heat exchanger is employed where even slightest intermixing of fluids can not be tolerated. A fixed-tubesheet heat exchanger has straight tubes that are secured at bothends to tubesheets welded to the shell. The construction may have removable channelcovers , bonnet-type channel covers , or integral tubesheets. The principal advantage of the fixedtubesheet construction is its low cost because of its simple construction. In fact,the fixed tubesheet is the least expensive construction type, as long as no expansion jointis required.

 

 

Specifications :

  • The tube sheets at both ends of the fixed tube-sheet heat exchanger are connected and fixed with the shell by means of the welding method.
  • Fixed tube-sheet type heat exchanger features simple and compact structure, and low manufacturing cost for the same diameter of shell, the biggest number of caladria is available in tubular heat exchangers is widely applied in engineering.
  • In the event of a large differential temperature between the tubes and the shell, thetubesheets will be unable to absorb the differential stress, thereby making it necessary toincorporate an expansion joint.
  • This takes away the advantage of low cost to a significant extent.

Applications :

  • The Fixed tube-sheet heat exchanger are that shell pass cannot be cleaned with the mechanical method and the maintenance is difficult.
  • The Fixed tube -sheet heat exchanger is applicable to all services where the temperature difference between the shell and tube is small, the temperature difference is slightly great but the pressure of shell pass is not high with media in the shell pass not easy to scale.
  • The shell pass can be cleaned with chemical method after the scaling is formed.

Advantages :

  • The tubes can be cleaned mechanically after removal of thechannel cover or bonnet, and that leakage of the shellside fluid is minimized since thereare no flanged joints.
  • A disadvantage of this design is that since the bundle is fixed to the shell and cannot beremoved, the outsides of the tubes cannot be cleaned mechanically.
  • Its applicationis limited to clean services on the shellside.
  • Satisfactory chemical clean-ing program can be employed, fixed-tubesheet construction may be selected for foulingservices on the shellside.

Fixed Tube Sheet Heat Exchangers Manufacturer INDIA

 

Heat Exchanger Manufacturers INDIA

Fixed Tube Sheet Heat Exchangers

Jun 27
0
Finned Tube Heat Exchanger Manufacturers

Finned Tube Heat Exchangers

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Finned Tube Heat Exchangers

Finned Tube Heat Exchanger

Finned Tube Heat Exchangers is a type of heat exchanger design that uses plates and finned chambers to transfer heat between fluids. It is often categorized as a compact heat exchanger to emphasise its relatively high heat transfer surface area to volume ratio. The plate-fin heat exchanger is widely used in many industries, including the aerospace industry for its compact size and lightweight properties, as well as in cryogenics where its ability to facilitate heat transfer with small temperature differences is utilized.

A high degree of flexibility is present in plate-fin heat exchanger design as they can operate with any combination of gas, liquid, and two-phase fluids. Heat transfer between multiple process streams is also accommodated,

 

Finned Tube Heat Exchanger Mnufacturer

Finned Tube Heat Exchanger

The main four type of fins are: plain, which refer to simple straight-finned triangular or rectangular designs; herringbone, where the fins are placed sideways to provide a zig-zag path; and serrated and perforated which refer to cuts and perforations in the fins to augment flow distribution and improve heat transfer.

ATU Cooler Finned Heat Exchanger

ATU Cooler Finned

Specifications :

  • Originally conceived by an Italian mechanic, Paolo Fruncillo.
  • A plate-fin heat exchanger is made of layers of corrugated sheets separated by flat metal plates, typically aluminium, to create a series of finned chambers.
  • Separate hot and cold fluid streams flow through alternating layers of the heat exchanger and are enclosed at the edges by side bars.
  • Heat is transferred from one stream through the fin interface to the separator plate and through the next set of fins into the adjacent fluid.
  • The fins also serve to increase the structural integrity of the heat exchanger and allow it to withstand high pressures while providing an extended surface area for heat transfer.

Applications :

  • The cost of Fin heat exchangers is generally higher than conventional heat exchangers due to a higher level of detail required during manufacture.
  • However, these costs can often be outweighed by the cost saving produced by the added heat transfer.
  • Fin heat exchangers are generally applied in industries where the fluids have little chances of fouling.
  • The delicate design as well as the thin channels in the fin heat exchanger make cleaning difficult or impossible.

Advantages :

  • High heat transfer efficiency especially in gas treatment
  • Larger heat transfer area
  • Approximately 5 times lighter in weight than that of shell and tube heat exchanger.
  • Able to withstand high pressure

Finned Tube Heat Exchangers

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