What is the working principle of chiller?

Answer 1

A chiller plant normally consists of evaporator pumps, chillers, condenser pumps, and cooling towers.

The evaporator pumps pump chilled water out to the building through a water pipe loop to air handler units that use valves to vary the amount of chilled water to that unit's water coil to control the temperature of the air coming out of the unit. Thus added heat back into the water that goes back to the plant.

The return water from the building goes to the evaporator side of the chillers & they cool it back down, transferring the heat to the condenser side of the chillers, which is a separate water loop.

The condenser pumps pump the condenser water out to the cooling towers, which are outside. The water is pumped to the top of the tower & then rains down inside it. There are big fans on the top of the tower that pulls air through the tower, thus across the raining water & blows it outside. This water pools up at the bottom of the tower & is sucked back into the building to run through the condenser side of the chillers again, thru removing the heat from the building.

Answer 2

In air conditioning units a chiller works by passing the coolant through coils that rapidly cool the down. The coils have air forced around them and the cool aire given off the coils is what generates the air conditioning.

Answer 3

In a chilled-water system, the air conditioner is installed on the roof or behind the building. It cools water to between 40 and 45 degrees Fahrenheit. The chilled water is then piped throughout the building and connected to air handlers.

Answer 4

PV=nRT

The basic principle is that in a gas as pressure is reduced temperature goes down. The mechanics of reducing the pressure are different for different machines.

If you are driving a turbine with the steam it is likely you are using a turbine to reduce the pressure in the working gas. If you are using a piston then it is likely you use a piston on the working gas. But we shouldn't have to guess at your mechanism to answer your question.

If you do not know your mechanism, there is no way you can troubleshoot it even being there and seeing it.

Seal in pistons, filters, friction in mechanical devices, valves not set properly, operating temperatures not proper, working gas not at proper pressures, etc. can all contribute to less than optimal output.

Answer 5

I operate and work with three types of chiller. 1 Air cooled, 2 Cooling tower cooled, 3 Steam vapour. Cooling by air, systems- Compressor drives refrigerant gas throw copper pipe, after passing compressor it enter in expansion valve. In here refrigerant gas expand and becomes cool, this coolant gas goes throw 1st heat-exchanger received heat from water and become hot. This hot gas goes throw 2nd heat-exchanger, this is series of air blower fan which cool-down refrigerant gas and then refrigerant gas repeatedly entered in compressor. This process happen again and again until it reach required setting temperature (desire water temperature). Cooling by cooling tower, systems- all the systems works same as air cooled chiller only different is 2nd heat exchanger, in here heat exchanged by cooling tower water. For running chiller- firstly check cooling water reserved tank water level, then check the refrigerant gas pressure every thing alright then proceed next steps.1st steps cooling water pump running, pump OK then 2nd steps refrigerant gas compressor running. Then carefully monitor all process works properly. Check high/low gas pressure gauge, should be between permitted range. Typically high pressure between 09-10 Bar and low pressure between 04-06 Bar. Set the cooling water temperature as need and set differentiation of upper limit/ lower limit. Watch carefully, if temperature reach lower limit refrigeration gas compressor should be shut off and temperature reach upper limit refrigerant gas compressor should be start. All the parameter i write down in log book. Check all systems after an hour. Steam vapour chiller operation quite complex.