Energy Consumption Survey And Simulation Analysis On Air Conditioning And Refrigeration System Of Xi'an Lifeng Shopping Plaza

This method of actual investigation, measurement and simulation by using TRNSYS were used to analyze the operational conditions and energy consumption of the air conditioning system of Xi'an Li Feng Shopping Plaza. The study is set from the insulation periphery structure,occupant density,interior lighting, building orientation, indoor temperature on winter and summer air conditioning load. Periphery structure of the additional insulation is cooling capacity for air conditioning in summer had little effect, but it seriously affected the air conditioning for heat in winter, the winter situation without air conditioning insulation materials for heat insulation material conditions for the addition of 1.72 times. Personnel density on shopping in winter and summer air conditioning loads have a greater impact, working air conditioning load is 1.33 times that of the holidays and weekends. Since energy-saving lamps,and lighting fixtures in the mall had very less effect on air conditioning load. Building orientation for such a small window and wall construction less affected than in the north and south of Xi'an to the building to the building more energy efficient than anything. Summer indoor design temperature change on the impact of air conditioning load is greater than the winter situation.Shopping personnel density through practical research specifild found that :days 0.12~0.16 person/m~2, holidays 0.15~0.21/m~2, far less than the limiting value 0.5to1.5 person/m~2 [2] leading to excessive cold air conditioning design, resulting in cooler selection is too large, making the cooler chilled water supply and return water temperature in the 3~4℃between the refrigerator and inefficient. Through the simulated part of the mall air-conditioning load in summer mainly concentrated in the 30% rate to 60%, accounting for the total running time of the summer air conditioning to 88%, 60% of the cases only 10%, "big horse cart" in serious condition.Glass House side of the court building to LOW-E glass, energy-saving programs, the court temperature can drop about 2℃. And thus the cooling demond for air-conditioning system can reduce by 1.75×10~4kWh. In the interior zone of the building,only sending the mixture air of fresh air and return air can make temperature reach 18℃.After taking this measure in winter,the amount of heat supplied by the air conditioning system can reduce the 9.16×10~4kWh.