Indoor Thermal Comfort And Economic Evaluation Of Different Heating And Air-conditioning Systems

Energy conservation and thermal comfort are two key problems researched inHVAC field. With the increase of demand for buildings and the development ofheating and cooling technologies, the ways of heating and cooling supplyingbecome various. The energy consumption and thermal comfort of these ways are thepoints cared by people.This paper takes heating and air conditioning program of Heilongjiang BorderDefense Corps communications station for engineering practice, studies comfortand economic issues of common heating and air conditioning program. Buildingheating and air conditioning load is calculated, the initial scheme is proposed, andcomfort and economy of each scheme are studied in detail. Mainly aspects of thework are as follows.Taking the selection of heating and air conditioning program of HeilongjiangProvince Border Defense Corps communications for example, the cooling load iscalculated using cooling load factor method while the heating load is calculatedusing the method of steady-state heat transfer. According to the research of heatingand air conditioning program and the actual engineering situation, the initialprogram of heating and air conditioning and hot and cold source programs wereproposed.Taking a typical office room in the building as the prototype, a numericalsimulation study on the comfort of the initial heating and air conditioning programwas carried out with Air-Pak software. PMV was selected as an evaluation indexto provide a reference to determine the indoor heating and air conditioning program.Basing on knowledge of economics, the initial investment, running costs andthe annual cost of the three were evaluated. From the perspective of Primary EnergyRatio(PER), this paper evaluated the energy efficiency of sewage source heat pump,gas direct-fired unit, chillers plus coal-fired boiler house in order to provide areference for the heating sources selection in actual project.