SIMULATION ON HYDRAULIC HEATING SYSTEM OF BUILDING UNDER THE CONTROL OF THERMOSTAT RADIATOR VALVES

Considering the dynamic control process of thermostatic radiator valves (TRVs) and adjustement behavior of consumers, as well as heat transfer through neighborhood, the main purpose of this paper is to derive a total model for simulating and analyzing the dynamic behavior of hydraulic heating system with the control of TRVs in multi-family building, based on state space model of room dynamic performance. This is done by treating building and the heating system as complete entities. First of all the dynamic models for rooms, radiators and TRVs are derived. Then the suggested models are formulated as a whole system. Multizone model for the simulation of building thermal performance is complicated and will be more difficult when considering dynamic process of radiators and TRVs, Thus the heat transfer between neighboring rooms is simplified by using explicit difference approximately. Finally, Detailed simulation of an actual building is given to verify the component models and their interactions. The experimental measured neighbor rooms temperature, outdoor temperature and supply temperature are used as input to the model, and the calculated results are compared with the measured air temperature and return water temperature. The agreement between simulant and measured data is quite good. KEYWORDS multi-family building simulation, hydraulic heating system, thermostat radiator control valves, variable flow-rat