Research On Comfort With Capillary Radiation Air-conditioning System In Heating Condition

With the promoting of building energy saving and the improving requirement toindoor thermal comfort, to use a more advanced, more energy saving of indoor airconditioning system is becoming more and more important. Because of theadvantages that high comfort, remarkable energy saving and save the architecturalspace which the capillary radation air-conditioning system has, it has been widelyused. This article use the numerical simulation and expermental method to researchthe capillary radation air-conditioning system. The main research as follows:Firstly, build four kinds of heating model: capillary is arranged in the roof andside wall, arranged in the floor and side wall, radiator heating model, air-conditioningsystem model. To the model which capillary is arranged in the roof and side wall theaccuracy of the numerical simulation is verified by the experimental results.Secondly, to the four kinds of model, compare the indoor temperature, air flowand PMV, the results concluded that in personnel activity area(1.1m below) radiationheating temperature changes of the most even, ceiling and side wall radiation heatingtemperature changes minimum; air-conditioning system have obvious hair drierfeeling, in some areas the wind speed is too fast; to the confort radiation heating isbetter than the others.Thirdly, to the ceiling and side wall radiation heating system investigate thecomfort when the diffuser is located in different position. The result show that whenthe diffuser is apart from the ground3.0m, the indoor comfort is best.Fourthly, using orthogonal test method to reseach the influence of the operationparameters such as fresh air to bear load, capillary spacing, average temperature of thesupply and return water of the capillary radiation air conditioning system of PMV. Theorder of the operation parameters effect on the PMV is that: average temperature ofthe supply and return water> fresh air to bear load> capillary spacing.Finally, starting from the thermal comfort, research the relations between theindoor temperature and the average temperature of the supply and return water. Thenput forward the control strategy.