The present work is an investigation of ground heat exchangers for the air-conditioning of the supply air to residential buildings. To this end, an analytical approximate solution for the temperature field of the ground in which a ground pipe hasbeen laid is derived. This analytical approximate solution is applicable to a free-lying ground heat exchanger consisting of a single ground pipe. Extensions of this solution enable calculations for ground heat exchangers which are laid around a house, or which consist of several ground pipes connected in parallel.
Work has been in progress for several years on the revision of Byggeforeskrifter (Norwegian Building Regulations), and the new chapter 54 sets quantitative requirements for the air tightness of sections of a building and the building as a whole. In this project, good and bad solutions are illustrated and an effort is made to show the importance of good workmanship. The commonest types of leakage were identified by examination of Leca pipes.The conclusion drawn from the investigations was that Leca pipes should be surface treated to prevent large air leakages.
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