Title: Brukermanual for Refra varmepumpe.pdf
The ground loop is a heat exchanger that is similar to a cooling coil or an evaporator in a chiller. The goal is to transfer energy from the heat pump loop fluid to/from the ground. The purpose of loop design is to estimate the required loop length. This is best done with computer software, but a basic understanding of the process is helpful. The heating and cooling loads provide the designer with the energy transfer rates for sizing the loop. The design supply fluid temperatures must be estimated. The larger the loop for a known load, the cooler the supply fluid temperature will be. Lower fluid temperatures improve the heat pump performance and capacity. The designer must find a balance between heat pump fluid supply temperature and the capital cost of the ground loop.