Comparative Dynamic Performance Tests of Two Real Technology Packages for Buildings Heating System Retrofit

摘要

This work is performed within the framework of the THERMOSS EU project. The main objective of the projectis to foster the deployment of advanced heating and cooling technologies with high replication potential, enabling20-30% primary energy consumption reduction through thermal solar combination, model predictive control andstorage strategy. The efficient match between supply and demand of energy is ensured by real-time managementof thermal energy at building level and at district level for District Heating and Cooling (DHC) connectedbuildings. Before installing the systems in real THERMOSS demonstration sites by the end of 2018, the wholesystem test of two heating technologies (hybrid solar heat pump and interface unit to heat network) from theindustrial partner has validated some recent features while assessing the performance of these technologies withdynamic reproducible boundary conditions (small residential buildings, Western European climate). The resultsassessed the primary energy savings in the range 9.7-36% and revealed its high sensitivity to control parametersettings related to the use of indoor temperature sensor. The realistic dynamic test also emphasized the majorinfluence on the standby heat losses of thermal inertia of the system components combined with flow temperaturecontrol. For both technologies, the realistic radiator thermostatic valve emulation enabled to keep the deviation of the space heat load below 1.8% compared to the reference individual gas boiler.