period two

Condensers

notes

Condenser Control

ICondenser capacity is influenced by:

K Temperature difference between refrigerant and cooling media

K Flow rate of cooling media through condenser K Flow rate of refrigerant through condenser

Figure 15

Condenser Control

The heat rejection capacity of a condenser is influenced by (1) the temperature difference between the refrigerant and the cooling media (air, water, or other fluid), (2) the flow rate of the cooling media through the condenser, and (3) the flow rate of the refrigerant through the condenser.

To balance the rate of heat rejection (in the condenser) with the changing system load, at least one of these variables may be controlled.

Condenser Capacity

pressure

 

full load

 

condenser heat

 

rejection capacity

full load

 

part load

part load

 

condenser heat

 

rejection capacity

enthalpy

Figure 16

As the system load decreases, the heat rejection capacity of the condenser is greater than the load. Because of this excess capacity, the condenser matches the decreasing load by operating at progressively lower pressures. Additionally, a reduction in outdoor air temperature allows the temperature of the air or water flowing through the condenser to drop. This also has the effect of lowering the condensing pressure.

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TRG-TRC005-EN

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Trane trg-trc005-en manual Condenser Control, Condenser Capacity

trg-trc005-en specifications

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