Water Source Heat Pump Loop Design

As the most energy efficient hvac systems on the market water source heat pumps wshps are uniquely simple in design.

Water source heat pump loop design.

Water for closed loop heat pumps is usually circulated at 2 25 to 3 00 gpm per ton of unit cooling capacity. When a non condensing boiler condenses soot is formed which builds up on the heat exchanger and burners and reduces its thermal efficiency. Topics include the latest technologies being used in heat pumps design and control of the water distribution loop and dedicated outdoor air system ground source systems and a review of the requirements in ashrae standard 90 1 that apply to wshp gshp systems. A water source heat pump extracts heat from the water when in the heating mode and rejects heat to the water when in the cooling mode.

The piping loop s begin and end at the heat pump. The closed loop water source heat pump concept provides an extremely simple highly flexible and unusually reliable semi decentralized system approach to year round space conditioning of multi room buildings. They can be open loop or closed loop systems. Heat is moved through an interconnected water loop and either rejected through a cooling tower or put to work in other areas.

Water source heat pump applications utilize low system return temperatures and most boiler designs such as cast iron and smooth tube cannot operate with system temperatures below 140 f without condensing. Cp3 and cp2 for open loop groundwater source heat pumps and surface water heat pump systems respectively. The design and installation of ground source systems should be undertaken with care and attention. The chiller condenser water heat is recovered instead of being rejected to the outside and used as a heat source for a water source heat pump system serving the perimeter spaces.

Each unit is an independent packaged system eliminating the chance of a total system failure. The water loop is piped through a building and each heat pump is connected individually. In combination with the heat pump s water to refrigerant heat exchanger they form a closed loop piping system. From one medium to another.

Water source heat pump wshp and ground source heat pump gshp systems. 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 the heat source evaporator load for the perimeter zone heat pumps. Water source heat pumps require a suitable local water source such as a lake river well borehole and so on. In addition unlike ground source heat pumps water source heat pumps do not require trenches for coils to be laid in although open loop systems often require filtration.

The water supply may be a recirculating closed loop or a once thru system using water from a well a pond or a stream. Open loop systems can present particular challenges and will require the services of a specialist. One of the most efficient and reliable hvac systems for your building is a water source heat pump wshp.