Guangdong Mall Building Energy Saving Design Of Air Conditioning System Research

Public building energy saving isn′t a new topic, there are a lot of researches about publicbuilding energy saving. The market building energy consumption accounts for over30percent of public buildings energy consumption, and the Heating Ventilating and AirConditioning take up more than50%of the market building energy consumption. So theresearches on public buildings energy saving of air-conditioning system which drawingpeople’s attention and becomes a heated topic. Therefore this paper research temperature andhumidity, carbon dioxide concentration, illumination and comfort of typical markets inGuangdong, and studying the mall air conditioning system problems and solutions.At first, the temperature and huidity,carbon dioxide concentration, illumination andcomfort on typical markets are tested in Guangdong area, where the problems of testingprocess are analyzed. According to the survey: the room temperature is too low and unevendistribution in shopping market, about7.4℃different;the humidity in shopping markets is toolarge during the transition seasons; carbon dioxide concentration is too high in theunderground shopping markets, cinemas and restaurants and other places, the fresh air volumein the（shopping）markets is in-adequate; the illumination of upscale shops exceed the relatedstandards. The questionnaire results coincide with the measured results,explains:the marketindoor design temperature is too low, when cooling it is lower than24℃.Air conditioningenergy consumption is too large, and air conditioning unit selection too much; there will be alarge flow and small temperature difference phenomenon in the wind systems and watersystems; carbon dioxide concentration and illumination is too high which exceed the relatedstandards, especially in transition seasons, the air quality is poor; comfort does not meet the “Regulations of moderate thermal environment PMV and PPD index were measured and thethermal comfort condition of standard”.Secondly, an energy consumption simulation of typical shopping building in Guangzhouwere taken, the conclusion shows that: the air-conditioning system energy consumptionaccounts for41.1%of total building energy consumption, coinciding indoor air temperaturetest which is low and high consumption before. and solutions are put forward to energysaving.Thirdly, a energy-saving simulation scheme about indoor comfort was put forward, thesimulation includes market indoor temperature, air velocity, PMV/PPD and AGE values. Asthe simulation results shown, the reasonable wind speed and temperature was1.8m/s and20℃to storey3meters shopping malls, also save the energy consumption of fan.Finally, A energy-saving scheme about how to rational use of fresh air in commercialbuildings during transitional seasons. Through the typical years of indoor and outdoortemperature and humidity parameter and enthalpy difference of some cities in Guangdongprovince shows that: the full fresh air system could be used to meet the market requirementsfor temperature and humidity from October18th to April7th next year. Through theestablishment of a consistent with the actual shopping markets in the heat of the light of theroom, and based on experiments of the room in transition seasons,verifyed the possibility ofusing full fresh air system in transitional seasons to save a lot of energy.