Hardware in the Loop Tests on Eleven Solar and Heat Pump Heating Systems
Abstract
Eleven heating systems that combine combistores with solar thermal collectors and heat pumps have been tested and evaluated as a whole by detailed measurements in a laboratory with the Concise Cycle Test (CCT). This hardware in the loop test utilizes the boundary conditions of climate and a typical load from a reference year in a representative 12-day test cycle. The complete systems were installed on a test rig that emulates a building and the tested systems acted autonomously to cover the heat demand for space heating and domestic hot water. The tests gave important insights into the behavior and the performance of these heating systems under transient operating conditions. One of the core findings is that the hydraulics and control strategy have a big influence on the temperature level of the heat pump condenser – and therefore also on the exergetic performance and the performance factor of the systems.
Keywords
“keywords: solar thermal, Heat pump, Combistore, Whole system test, Hardware in the loop”