Thermal Performance Research On A New Type Of Modular Ceiling Radiant Panel

In many countries, especially in Europe, cooling radiant ceiling panel is one of the widely used cooling model. Usually, the system is used in office buildings, school buildings, hospital buildings. After comparing with traditional air-conditioning systems, researchers believe that the system has many advantages. More hygienic and comfortable, less noise environment, and more convenient for erection and repair,etc can be provide by the system. These advantages accord with the requirement of people for a comfortable, healthy and energy-saving air-conditioning system.A new kind of radiant panel based on traditional panel be manufacture by a company in Zhuhai. Because of its simple structure, low price, especially, solution to the dew condensation problem, it may make radiant panel a bright prospect. But the new radiant panel has some shortages. For example, the cooling capacity of radiant panel be weaken by air gap. Finding out some parameters which do highly effect on the cooling capacity, and bring up optimum design of its structure parameters to improve the cooling capacity of the radiant panel through heat transfer model analysis is one of the purposes of this paper. These parameters include copper pipe outer diameter, pipe thickness, tube spacing, radiant emittance, plastic supporting height, temperature and flow rate of chilled water.The results show that the temperature of water, tube spacing and the radiant emittance influenced the radiant panel most in cooling capacity, followed by the plastic support height and pipe outer diameter. The pipe thickness and the flow rate of chilled water have little impact on cooling capacity; Cooling capacity of the radiant panel has a great potentiality, optimum design for the structural and operation parameters can improve its cooling capacity by 40% to 50%. A brief formula to estimate cooling capacity of the new radiant panel by means of heat transfer principle of fin is obtained in this paper. This fomula make radiant panel’s calculation more convenient and provide a reference for designer.