Fin Fan Coolers
The Air Cooled Heat Exchangers are also known as Fin fan Coolers. Since Fins are used in the Cooler it is called as Fin fan Cooler.
Fin Fan Coolers
Double Pipe Heat Exchanger
A double pipe heat exchanger, in its simplest form is just one pipe inside another larger pipe. One fluid flows through the inside pipe and the other flows through the annulus between the two pipes. The wall of the inner pipe is the heat transfer surface. The pipes are usually doubled back multiple times as shown in the diagram at the left, in order to make the overall unit more compact.
The term ‘hairpin heat exchanger’ is also used for a heat exchanger of the configuration in the diagram. A hairpin heat exchanger may have only one inside pipe, or it may have multiple inside tubes, but it will always have the doubling back feature shown.
Types of Double Pipe Heat Exchangers :-
1. Counter flow
2. Parallel Flow Heat Exchanger
1. Counter flow:-
The main advantage of a hairpin or double pipe heat exchanger is that it can be operated in a true counter flow pattern, To get More Efficiency, In the mean Time, it will give the highest overall heat transfer coefficient for the double pipe heat exchanger design.
2. Parallel Flow:-
Parallel Flow double pipe heat exchangers are focused to handle high pressures and temperatures applications. Also we can Achieve High Log mean Temperature using this.
3. Double Pipe Heat Exchanger Design:-
Determination of the heat transfer surface area needed for a double pipe heat exchanger design can be done using the basic heat exchanger equation: Q = UA ΔTlm, where:
Q is the rate of heat transfer between the two fluids in the heat exchanger in Btu/hr,
U is the overall heat transfer coefficient in BTU/hr-ft2-oF,Remove term:
A is the heat transfer surface area in ft2, and
ΔTlm is the log mean temperature difference in oF, calculated from the inlet and outlet temperatures of both fluids.
These parameters in the basic heat exchanger equation are discussed in ‘and they are used in an example in ‘ After determination of the required heat transfer surface area, the diameter and length of the inner pipe can be selected and then the diameter of the outer pipe. Finally, the length of the straight sections and the number of bends can be selected.
Copper heat exchangers are more efficient than shell and tube exchangers for low flow rates. Due to their simple construction they are low in price and easy to clean on the shell side. Their thermal efficiency approximates that of a true countercurrent flow type exchanger. Condenserors are used for condensation of vapours and cooling of liquids. Condensers are made by fusing number of parallel coils in a glass shell. Coils are made in different diameters using tubes of different bores.
Copper tubes are artificial to special requirements as to dimensional tolerances, finish and tempers for use in condensers and heat exchangers. These copper heat exchanger tubes are normally supplied in straight length in annealed & half hard temper. The copper tubes shaped by are metal industries not only have the stiff tolerances but also have the most dependable dimensions throughout the tube length. The tube surface is clean both inside and outside with no caustic stains. The copper tubes produced by are metal industries are suitable to transfer heat in a wide variety of operating conditions and to refuse to accept decay for the longest period of time possible under the harshest operating circumstances.
This is important because motors and motor-driven systems account for 43%-46% of all global electricity consumption and 69% of all electricity used by industry. Increasing the mass and cross section of copper in a coil increases the electrical energy efficiency of the motor. Copper motor rotors, a new technology designed for motor applications where energy savings are prime design objectives, are enabling general-purpose induction motors to meet and exceed National Electrical Manufacturers Association (NEMA) premium efficiency standards.
The average co-efficient of heat transfer in coil condenser is considered as :-
Condensation : 200 – 270 Kacl/m2, hr,oC apprx.
Cooling : 100 – 150 Kacl/m2, hr,oC apprx.
The purpose of heat exchangers is to transfer heat from one fluid (either gas or liquid) to
another. CHEs have a significantly greater surface area per unit volume than more conventional types of heat exchanger. For the purposes of the ECA Scheme, a CHE is defined as a heat exchanger with a surface to volume ratio of > 200
m2/m3.
These characterized by a high surface area per unit volume, which can result in a higher
efficiency than conventional heat exchangers, in a significantly smaller volume (typically
Compact heat exchangers can achieve efficiencies of over 95% cf. 80% for non-compact heat exchangers).
Compact heat exchangers transfer more energy in a cost-effective manner than other heat exchangers and save more energy when compared to standard technology.
Three types of compact heat exchanger are covered by the ECA Scheme. These are:
COIL TYPE HEAT EXCHANGER
Coil Type Heat Exchanger is nothing but Copper tubes are artificial to special requirements as to dimensional tolerances, finish and tempers for use in condensers and heat exchangers. These copper heat exchanger tubes are normally supplied in straight length in annealed & half hard temper. The copper tubes shaped by are metal industries not only have the stiff tolerances but also have the most dependable dimensions throughout the tube length. The tube surface is clean both inside and outside with no caustic stains. The copper tubes produced by are metal industries are suitable to transfer heat in a wide variety of operating conditions and to refuse to accept decay for the longest period of time possible under the harshest operating circumstances.Coil type exchangers are more efficient than shell and tube exchangers for low flow rates. Due to their simple construction they are low in price and easy to clean on the shell side. Their thermal efficiency approximates that of a true countercurrent flow type exchanger. Condenserors are used for condensation of vapours and cooling of liquids. Condensers are made by fusing number of parallel coils in a glass shell. Coils are made in different diameters using tubes of different bores.
Coil Type Heat Exchanger
Brazed Plate Heat Exchanger
We are the leading manufacturers of Air heat exchangers in India.
Brazed Plate Heat Exchangers represent the most compact, rugged and cost-effective means of transferring heat in many industrial and refrigerant applications. Built from 316 stainless steel with copper brazing materials, they provide exceptional corrosion resistance. The SB-Series features corrugated plates that produce highly turbulent flow in a true counter-current direction.
This results in high efficiency and a very compact heat exchanger design. Due to the smaller size and reduced material content, they can be the most economical heat transfer choice.API Heat Transfer Brazed Plate Heat Exchangers are available for process and refrigeration applications. Made from stainless-steel plates and copper or nickel brazing materials, they are suitable for a wide variety of heat exchanger applications.
Aluminium Heat Exchanger
A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.
Cryo-tek -100/AL is a blend of virgin (not recycled) propylene glycol and Hercules exclusive Triple Protection additives designed for use in hydronic heating and cooling closed loop piping systems (including PEX and radiant tube heating systems), ice melt and general heating systems where aluminum heat exchangers are installed.
Hercules Triple Protection additives provide outstanding protection against acid corrosion, scale and sedimentation formation in properly maintained systems containing recommended concentrations of cryo-tek Anti-Freeze.
Acid neutralizing agent protects by neutralizing corrosive acids.
Mineral Deposition Preventative eliminates scale formation on critical heat transfer surfaces, piping systems and equipment.
Mineral Sediment Preventative keeps minerals in solution, resisting formation of clusters of mineral salts and preventing particles from precipitating out of solution.
Used at recommended levels, all three agents work together to prevent bio film (slime) build-up.
Cryo-tek -100/AL may be used in systems fabricated with metal, plastics (except CPVC) and rubber piping, fittings, seals, and other parts.
Formulated for the maximum propylene glycol protection directly out of the container.
Certified Performance: Freeze Protection Down to -60°F / -51°C, Pumpable down to -70°F / -57°C, and Burst Protection Down to -100°F / -73°C.
Cryo-tek -100/AL can be diluted with water for less severe conditions.
air heater heat exchanger
Air Heat Exchanger
Water to Air Heat Exchanger are gadgets that several devices and plants use within order to shift heat from one medium to a different. Therefore regularly located, as they are part of a terrific variety of house appliances. Air conditioning units, ovens or outdoors wood central heating boilers all have this revolutionary product as part of their built. Additionally, a great variety of plants and oil refineries make use of high-temperature exchangers within their day-to-day operations.
The top-of-the-line known application for Water to Air heat exchangers is its use in household appliances.
Air Cooled Condenser :
AIR COOLED CONDENSER
Air Cooled Condenser
We are United Heat Exchanger providing solution for Air condensation system for all types of Thermal Power plants.In systems involving heat transfer, a condenser ( Air Cooled Condenser )is a device or unit used to condense a substance from its gaseous to its liquid state, typically by cooling it. In so doing, the latent heat is given up by the substance, and will transfer to the condenser coolant. Condensers are typically heat exchangers which have various designs and come in many sizes ranging from rather small (hand-held) to very large industrial-scale units used in plant processes. For example, a refrigerator uses a condenser to get rid of heat extracted from the interior of the unit to the outside air. Condensers are used in air conditioning, industrial chemical processes such as distillation, steam power plants and other heat-exchange systems. Use of cooling water or surrounding air as the coolant is common in many condensers.
air cooled heat exchanger
Air-cooled heat exchangers are generally used where a process system generates heat which must be removed, but for which there is no local use. A good example is the radiator in your car. The engine components must be cooled to keep them from overheating due to friction and the combustion process. The excess heat is carried away by the water/glycol coolant mixture. A small amount of the excess heat may be used by the car’s radiator to heat the interior. Most of the heat must be dissipated somehow. One of the simplest ways is to use the ambient air. Air-cooled heat exchangers (often simply called air-coolers) do not require any cooling water from a cooling tower. They are usually used when the outlet temperature is more than about 20 deg. F above the maximum expected ambient air temperature. They can be used with closer approach temperatures, but often become expensive compared to a combination of a cooling tower and a water-cooled exchanger.
Air Cooled Heat Exchanger
Typically, an air-cooled exchanger for process use consists of a finned-tube bundle with rectangular box headers on both ends of the tubes. Cooling air is provided by one or more fans. Usually, the air blows upwards through a horizontal tube bundle. The fans can be either forced or induced draft, depending on whether the air is pushed or pulled through the tube bundle. The space between the fan(s) and the tube bundle is enclosed by a plenum chamber which directs the air. The whole assembly is usually mounted on legs or a piperack.
The fans are usually driven be electric motors through some type of speed reducer. The speed reducers are usually either V-belts, HTD drives, or right angle gears. The fan drive assembly is supported by a steel mechanical drive support system. They usually include a vibration switch on each fan to automatically shut down a fan which has become imbalanced for some reason
The air-cooled heat exchangers are mostly used when the plant location and the ambient conditions do not allow an easy and economic use of other cooling systems.