Convegni ATI - Accesso riservato soci CTI

Autore: M. Piechowski

Collana: CA - 49 - Perugia 1994

Note:
A Ground Source Heat Pump (GSHP) is a heat pump which is linked with the soil by means of a ground heat exchanger. The soil is used here as a heat sink or source depending on the operating mode. In the cooling mode operation heat from the system is rejected to the soil, while during the heating mode operation soil is used a heat source for the system. By the system we understand here a heating and cooling system together with a thermal storage. A thermal storage might be either a cold thermal storage alone or together with a hot thermal storage, eg. hot water storage. In this paper we would like to concentrate on the principles of the design of a system working mainly in the cooling mode (summer operation). Essentially, the design of a system consists of three interrelated elements, that is a ground heat exchanger, thermal storage and a suitable operation strategy. The system ought to be designed in such a way that the thermal load of the building is satisfied by either a heat pump using a ground heat exchanger alone or in combination with a thermal storage. In other to avoid an unexpected reduction of the heat pump capacity as a result of a prolonged heat rejection to the soil, we need to be able to predict the long term performance of the ground heat exchanger.