What is the evaporative condenser used for?
What is the evaporative condenser used for?
An evaporative condenser is used to remove excess heat from a cooling system when the heat cannot be utilised for other purposes. The excess heat is removed by evaporating water. The evaporative condenser has a cabinet with a water-sprayed condenser, and it usually has one or more fans.
What is evaporative condenser?
Evaporative condenser. A device whose main purpose is to cool water of fluid by passing that fluid through a heat exchanger which is itself cooled by contact with water passing through a stream of air.
What is an ammonia condenser?
Ammonia Shell And Tube Condensers A shell and tube condenser (heat exchanger) is the most common type of heat exchanger used in refrigeration industry. Here water runs through the tubes, and ammonia vapour flows over the tubes (through the shell) to transfer heat between the two fluids.
What is the condensing temperature of ammonia?
A 100oF (38oC) day results in a condensing temperature of 125oF (52oC). At this condensing temperature, ammonia will be at 293 psig.
What is the difference between a cooling tower and an evaporative condenser?
The main differences are that the cooling water in an evaporative condenser simply goes from the basin to the top of the evaporative condenser since the coils/tubes are in the evaporative condenser. The cooling tower sends the cooling water to distant heat transfer equipment. There are no coils in the tower.
Is condenser the same as cooling tower?
Cooling towers and condensers both heat exchanger equipment but operate in opposite ways. Condensers turn a substance from gas to liquid by way of cooling it (with either air or water that would come from a cooling tower).
What are the advantages of evaporative condensers?
ADVANTAGES OF EVAPORATIVE CONDENSER
- Evaporative condensers reduce the water pumping and chemical treatment requirements associated with cooling tower-refrigerant condenser system.
- Also, they require substantially less fan power than the air cooled condenser of comparable capacity.
How does an ammonia condenser work?
In the cycle, the ammonia gas is compressed using the compressor, which causes it to heat up as it is pressurized. In the coils, the heat is dissipated, which causes the ammonia to condense into a liquid.
What does an ammonia compressor do?
The compressor compresses the ammonia gas. The compressed gas heats up as it is pressurized (orange). The coils on the back of the refrigerator let the hot ammonia gas dissipate its heat. The ammonia gas condenses into ammonia liquid (dark blue) at high pressure.
Why is ammonia compressor water cooled?
This also enables high suction pressure for the compressor and lower compression ratio. 7) High discharge temperature of ammonia gas: The discharge temperature of the ammonia refrigerant from the compressor is high, hence water cooling of the cylinder heads and the cylinders of the compressor is very important.
What is the viscosity of ammonia?
0.266 centipoise
| Molecular Weight: | 17.031 |
|---|---|
| Viscosity, Liquid @ -33.5° C., 1 atm. : | 0.266 centipoise |
| Heat of Formation, Gas @ 25° C.: | -11.4 kcal/mole |
| Entropy, Gas @ 25° C., 1 atm. : | 45.967 cal/mol ° C |
| Solubility in Water @ 0° C., 1 atm. : | 42.8% by weight |
What are the three basic types of condensers?
A condenser’s function is to allow high pressure and temperature refrigerant vapor to condense and eject heat. There are three main types: air-cooled, evaporative, and water-cooled condensers.
How does an air cooled condenser work?
In an air cooled condenser the refrigerant rejects heat to ambient air. According to second law of thermodynamics, heat transfer can only occur from a medium at higher temperature to a medium at lower temperature. Hence to increase the temperature of the refrigerant it is compressed to corresponding pressure in the compressor.
What is condenser and coil?
A condenser coil is one of many types of heat exchangers. The primary purpose of a heat exchanger is to efficiently transfer heat between two mediums. Condenser coils are found in space heaters, air conditioners, and car radiators. Although there are slight differences in the function of these devices, the primary purpose is the same.
What is an ammonia compressor?
An ammonia compressor is a mechanical device that creates refrigeration by removing heat from objects or spaces. Compression systems refrigerate by changing a refrigerant, such as ammonia, various types of Freon ™, and other gases, from a liquid state to a gaseous state and back to liquid.
