Experimental Low-Energy House at the Technical University of Denmark. Description of a System for Simultaneous Testing of Heating Systems for Conservation Houses under Actual Climate Conditions

摘要

During the winter 1981-82 a test facility has been built in connection with a multiple-purpose experimental low-energy house. In this test facility different sources of heat, mainly for hydronic systems, can be tested simultaneously under actual climate conditions, each test unit at any time generating the quantity of heat demanded by the experimental house. The basic control unit of the simulation system is a sensitive differential controller operating a fast modulating magnetic three-way valve. A series of tests shows that these controls will adjust the distribution and return temperatures in the simulation system according to the system temperatures in the experimental house with a mean deviation of less than +- 0.15 deg C. The first heat sources to be tested in the simulation system are two heat pumps - an air-to-air heat pump drawing heat from the external air and a water-to-water heat pump drawing heat from the ground. The air-to-water heat pump was installed in March 1982, and preliminary tests from the first period of operation show efficiencies of the heat pump unit ranging from 2.2 to 2.6 - the power consumption including the electricity used by the compressor and the evaporator fan. The water-to-water heat pump was installed in May 1982. The first measurements will be carried out at the beginning of the heating season 1982-83. (ERA citation 09:016737)