Research On Heating Mode Of Low Energy Consumption Building In Severe Cold Region

At present,the building energy consumption problem increasingly prominent,the cold region in winter heating load,energy consumption is more serious,for the sake of fossil energy consumption and reduce pollutants discharge,thus put forward a kind of complementary energy more clean energy or solar energy,air source heat pump heating mode and electric auxiliary hybrid heating way,capillary radiation board as the end of the heat dissipation,in order to achieve the goal of emission reduction consumption.Based on hourly building load heat,air source heat pump and solar collectors to provide heat and electric heating heat thermal equilibrium relationship,establish heat supply side and the building thermal consumption side thermal equilibrium mathematical model.In cold region,a low energy consumption building demonstration in Changchun city as an example),using the DEST software to the local outdoor dry bulb temperature,the humidity outdoor,solar radiation and construction,to simulate the hourly load according to the simulation results and actual working hours of outdoor dry bulb temperature distribution,the air source heat pump matching optimization.Air source heat pump in "public building energy efficiency design standard" regulation minimum COP,cold region-25oC can be used as a minimum reference temperature of the air source heat pump design for equipment selection,insufficient heat can use electric auxiliary heating mode complement,electric auxiliary power accounted for 4.5% of the cooling load.As solar energy,air source heat pump and electric auxiliary heating systems use fixed number of year for 15 years,the strongest solar collector design calculation under solar radiation area is the most economical,the solar heat load and ultra-low temperature air source heat pump and electric heating accounts for a total load ratio28:71:1.The system can reduce the equipment capacity of the air source heat pump and reduce the initial investment expenses in the premise of satisfying the heating demand of the hot users.Solar energy heating system,air source heat pump and electric auxiliary heating system load matching relationship of low energy consumption building,reconstruction of existing buildings heating and apply new energy saving building,has the rationality and feasibility.The system effectively uses clean energy to reduce the combustion of fossil energy,thus reducing the emission of harmful substances.