METHOD AND DEVICE FOR TESTING THERMAL RESPONSE OF UNDERGROUND HEAT EXCHANGER

摘要

PROBLEM TO BE SOLVED: To provide both a thermal response testing method to be performed for estimating the amount of heat collection by an underground heat exchanger by obtaining the thermal conductivity of the ground and for determining the length of an embedded heat exchanger pipe and a thermal response testing device. SOLUTION: In the method for testing the thermal response of the underground heat exchanger, water at temperatures higher than that of ground heat is circulated in the heat exchanger pipe 1 embedded underground. The thermal conductivity of the ground E is computed from the amount of heat radiation and water temperature of the heat exchanger pipe 1, and the length of the embedded heat exchanger pipe 1 is obtained from the thermal conductivity. In the device for testing the thermal response of the underground heat exchanger, a communicating pipe 2 communicates with the heat exchanger pipe 1 on the ground, and the communicating pipe 2 is provided with at least a heater 3 for heating water, a circulating pipe for circulating the water, a flow meter 5 for measuring the amount of circulation of the water, an entrance water temperature gauge 6 arranged on the entrance side of the heat exchanger pipe 1, and an exit water temperature gauge 7 arranged on the exit side of the heat exchanger pipe 1. A plurality of ground heat temperature gauges 8 are provided in a vertical direction outside the heat exchanger pipe 1.