Tag Archives: Condenser (heat transfer)

Evaporator Coil for Heat Pumps & Air Conditioners | HVAC Refrigeration

Old Evaporator Coil in a Rooftop Air ConditionerEvaporator Coil for Heat Pumps & Air Conditioners - the evaporator is responsible for absorbing heat into the coils and the refrigerant. The evaporator is an essential component of vapor compression refrigeration. This is usually done as result of passing air or water over the evaporator coil where a heat exchange process takes place. Heat leaves the air or water (whatever medium is used) and is absorbed into the coil and the liquid refrigerant. As more and more heat is absorbed by the evaporator coil and the refrigerant again changes state from a liquid to a refrigerant vapor. By the time the refrigerant leaves the evaporator coil the refrigerant should be all vapor and ready to be received again by the refrigeration compressor.

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About Chilled Water Systems | HVAC Hydronics

About Chilled Water Systems

Old York Chiller

About Chilled Water Systems – Chilled water systems are mainly used in large commercial HVAC air conditioning systems and industrial cooling applications although there are some residential and light commercial HVAC chilled water systems in use. Chilled water systems are popular because they use water as a refrigerant. Water is far less expensive than refrigerant. This makes them cost effective especially in commercial HVAC air conditioning applications. Instead of running refrigerant lines over a large area of the building water pipes are ran throughout the building and to evaporator coils in air handlers for HVAC air conditioning systems. The chilled water is pumped through these pipes from a chiller where the evaporator coil absorbs heat and returns it to the chiller to reject the heat.

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Cooling Tower Evaporation Cools Water | HVAC Technical

Cooling Tower Evaporation Cools WaterCooling Tower Evaporation Cools Water | HVAC Technical

Cooling towers use the process of evaporation to cool or removes heat from the condenser water that was transferred to the water in the chiller condenser barrel. The heat is absorbed at the load in this case in a data center on a data center floor. The servers and electrical equipment produce a massive amount of sensible heat. The heat is absorbed by computer room air conditioners or computer room air handlers. These systems, computer room air handlers and air conditioners, have chilled water coils. The chilled water originates at the chiller into the primary loop. The water circulates through the primary loop and makes its way into the secondary loops.

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Large Condenser Pump for a Chilled Water System

Large Condenser Pump for a Chilled Water SystemLarge Condenser Pump for a Chilled Water System

This large HVAC condenser pump serves a new chiller located in a data center. This pump pumps condenser water through the condenser chiller barrel and to a cooling to reject the heat absorbed in the chillers evaporator barrel. The pump works to move the water from the chiller to the cooling and then back through the chiller again. The water is diluted with a glycol solution to prevent freezing in the winter time when the chiller needs to run at low ambient temperatures.

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Air Conditioner Troubleshooting | HVAC Technical

Air Conditioner Troubleshooting

Air Conditioner Troubleshooting – To properly troubleshoot air conditioners one needs to understand some basics of air conditioners including refrigeration, electricity, electrical components and how electro-mechanical controls work, basic air conditioner components and air conditioner sequence of operation. Before troubleshooting air conditioners you need to identify the basic problem of the air conditioner. Is a component not working and why is the component not working. For example, is the compressor working and if the compressor is not working is it the compressor that is bad or is it an electro-mechanical component that controls the compressor with the problem that will prevent the air conditioner from running? So in the process of troubleshooting air conditioning not only do you need to know the basics of air conditioners you also need to understand basic techniques for troubleshooting air conditioners.

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SUNDAY, JULY 20, 2014