An Investigation of lower Installation Cost of the GSHP System with Pile Heat Exchangers

Abstract

A ground source heat utilization system is considered to have higher energy saving performance compared with air heat utilization. However, the initial installation cost is high due to many components and construction processes. Reducing the initial installation cost is important to expand spread. Therefore, in order to lower the installation cost of a ground source heat utilization system for general houses, the installation of pile heat exchangers, detailed design of piping and prefabricated assembling method were carried out. As a result, the prospect of realizing the initial introduction cost of 1.5 million yen / (5 kW heat output) by the prefabricated assembling method was obtained.