| Because of its comfortableness and energy conservation, radiant floor heating system is widely used in housing. Temperature of hot water supplied in the system is relatively low,which makes the system and ground source heat pump system has good adaptability. The combined operation of the two systems can improve the heating efficiency.On the basis of domestic and foreign relevant research,the paper mainly use CFD for analysis. The study on the practical application of ground source heat pump and radiant floor heating system,the method of calculation for radiant floor heating,and the control model is not very thorough. Many models for floor radiation have been simplified to two-dimensional model. There are some errors in the analysis of twodimensional models,so it is necessary to establish a three-dimensional model on the room with all aspects for research.Firstly, a three-dimensional radiant floor heating model on a single room is established by the pre-processing software Gambit. After drawing the grid,the model is introduced into software Fluent for the simulation of radiation heat transfer. In the calculation process,the supply of hot water is controlled in accordance with changes in air temperature. After calculation,the room temperature curves with different loads and its start-stop control time can be get.Secondly, a new model is established according to the building consisting of rooms with different loads. Based on the start-stop time for a single room,a time-control strategy is proposed to ensure all rooms of in the building can achieve comfortable conditions. Then the strategy must be inspected by the calculation and adjusted if necessary.Finally, the radiant floor heating system associated with several common heat source is running in the light of the control strategy. After the analysis of energy assumption of these combined system,the conclusion can be get:ground source heat pump and radiant floor heating system has better energy efficiency in line with the control strategy. |
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