Principles of modelling of slinky-coil groundheat exchangers

The paper presents analytical relationships based on the theory of Green’s functions. The relationshipsrefer to instantaneous and continuous as well as point and ring heat sources which are discussed. Therelationship relating to continuous ring source is the basis for modelling and designing of spiral groundheat exchangers. Heat transfer in the infinite and semi-infinite body was considered. In the latter case,the image method was discussed. Using the results of measurements regarding heat transfer in theground with a heat exchanger in the form of a single coil installed, a comparison of calculated groundtemperatures with measured values was presented.