Analysis Of Performance In Household ASHP Heating

With high efficiency, energy saving, environmental protection and other (?)intages, more and more attention are paid on air source heat pump(ASHP). However, due to its dependence on climate, its promotion is limited in scope. How to make air source heat pump system optimization and reduce the impact of harsh winter weather on system performance has become the focus of many researchers in the air conditioning industry. The rapid development of computers has penetrated into all walks of life, the use of computer simulation technology to solve all kinds of practical engineering problems have already gained some results currently. In the field of HVAC simulation technology no long based on the test stand, Through computer simulation, can forecasts, analysis of the operating characteristics of the air conditioning system, applied to the simulation of air source heat pump system, not only for the debugging of the household air source heat pump, the development of beneficial help, but also cost savings, greatly reducing theR&D cycle.In addition, the analysis of the primary energy efficiency to achieve a unified evaluation of the energy ’quality’and’quantity’, which is of great significance to carry out energy-saving air conditioning and refrigeration equipment.By reference to the large number of heat pump air conditioner simulation literature,combined with the equation and the empirical formula given in the literature,established a steady-state conditions model for household ASHP system. Among them, condenser and evaporator modeling used the distributed parameter method, compressor used parameter fitting method, the capillary model use a combination of relational and distributed parameter methods to model. On the basis of the dichotomy, the use of MATLAB simulation to solute the changed conditions of R410a, R22air source heat pump system model. Analysis of the changed conditions of the simulation results in R410a ASHP system, that is, when the wind speed, outdoor temperature, capillary length changes, the impact on system performance. And compared simulation results with R22heat pump system’s.Computer the exergy analysis, energy efficiency of R410a air source heat pump system and conventional electric heating, perfect the evaluation system of R410a ASHP system. Compare the efficient of this two heating mode. The results showed that:R410a air source heat pump heating system as much as R22heat pump system, not only in the performance of heating system, but also more energy-efficient than conventional electric heating in energy efficient use.