Heat Pump Cooling Tower

Typically outdoor air is conditioned and delivered by a.

Heat pump cooling tower.

During operation heat is transferred from the warm fluid in the coil to the spray water and then to the atmosphere as a portion of the water evaporates. Water source heat pump applications. Plate heat exchangers with open circuit cooling towers. As the most energy efficient hvac systems on the market water source heat pumps wshps are uniquely simple in design.

Also connected to this water loop are a heat rejecter e g cooling tower or geothermal heat exchanger a heat adder e g boiler or geothermal heat exchanger circulation pumps and related accessories. The heat pumps are connected to a common water loop figure 1. For example if there is a moment when cooling and heating loads are equal this system can operate with both the boiler and cooling tower deactivated. The chiller adds heat to the condenser water and the cooling tower cools it down by rejecting this into the atmosphere.

For the tower piping circuit the pump must overcome the piping flow friction loss. Piping condenser cooling tower losses and valves. It must also provide the energy head necessary to raise water from a low to a higher static head level. The need to install a dedicated heat pump for each building zone drives up the cost of these systems but this is compensated in the long term thanks to the superior energy efficiency achieved.

In general adiabatic cooling can reduce operating costs by up to 30 percent compared with conventional open circuit cooling towers. An alternative to adiabatic cooling is to keep the conventional cooling tower but isolating it from the process or chiller plant with a plate heat exchanger. In addition to chiller applications and industrial process cooling closed circuit cooling towers are often used in heat pump loops where closed loop cooling is preferred. The closed water loop provides condenser water to the interior zone cooling units picking up the heat normally rejected to a cooling tower and transferring it as.

A centrifugal pump moves water known as condenser water between the chiller in the basement and the cooling tower on the roof. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet bulb air temperature or in the case of closed circuit dry cooling towers rely solely on air to cool the working fluid to near.