The Operation Characteristics And Temperature Field Simulation Of Ceiling Radiation In Hot Summer And Warm Winter Area

This paper focus on the study of Ceiling radiation assist with Ground source heat pump air conditioning system to analysis the operation characteristic by experiment.Simulate the energy consumption and temperature field by Design Builder and PHOENICS for the application of ceiling radiation technology in hot summer and warm winter area.The main research content is as follows:(1)In this paper,the application of ceiling radiation assist with ground source heat pump in office buildings in hot summer and warm winter area.The experiment test of system operate in cooling and heating condition show that the system and unit cop is 3.6 and 5 in heating condition.In cooling condition the system and unit cop is 3.2 and 4.2.So the system operate stably with obvious energy saving characteristics.(2)Using single factor method that changed the inlet water temperature to analysis the relationship between inlet temperature and heat exchange per unit area in cooling and heating condition?Pointed out that in normal operation condition,radiation plate heat transfer per unit area is more than 300 W/m2.(3)By the study of system operate.Compare the vertical temperature difference in three different working condition:radiant independently?radiant +nature wind?radiant + preheat air.The result showed that radiant + preheat air the vertical temperature difference is the minimum,2 m below the vertical temperature difference at about 1?.In cooling condition,compare the vertical temperature difference in two different working condition:radiant independently?radiant +cooling air when radiant +cooling air operate in a long time it performance well.And it also showed that system with obvious dehumidification ability.2 m below the vertical temperature difference in 0.3 ?or so,at the same time,through the experiment shows that in terms of frozen dehumidification,room humidity is relatively stable,freezing dehumidification effect is equivalent to the temperature for 28 ?,humidity is about 70%drop to the air temperature in 22 ?,humidity is around 55%,freezing effect meet summer humidity comfort range.(4)Through DESIGN BUILDER build model to analysis the energy consumption of the building by experiment dates,Through calculation and analysis of energy consumption of refrigeration simulation by about 12.4%,the heating energy consumption and simulation is about 1%,And make use of PHOENICS to simulate the radiant effect in room temperature filed in that radiant independently,radiant + preheat/cooling air condition.Results show that the maximum temperature difference in the vertical direction room 1? or so.Where there is fresh air,in addition to outlet speed is larger,the rest are very weak and feel no wind.