食品库房类建筑中溶液调湿空调碳减排潜力应用研究

RESEARCH ON CARBON EMIISSION REDUCTION POTENTIAL OF LIQUID DESICCANT AIR-CONDITIONING SYSTEM FOR FOOD WAREHOUSE

空调系统能耗是食品库房类建筑能耗的重要构成,为推动食品库房类建筑的低碳化发展,通过现场测试与模拟分析相结合的研究方法,对某巧克力成品库房的溶液调湿空调系统进行性能现状测试与优化潜力分析。研究结果表明,相比于常规的冷冻除湿系统,溶液系统在供冷季的碳减排率可达10.3%。由于小湿差大风量的空气处理特征,系统风机能耗高达近50%,仅考虑热湿处理过程冷热源能耗的优化原则无法实现系统整体性能最优,二次回风系统有助于实现系统性能最优,一次回风与二次回风风量的最优比值区间为0.4~1.5。

Air-conditioning system is a big energy consumer and carbon emitter in food warehouse buildings,and energy conservation of the system plays an important role in achieving a decarbonized future in food storage industry.In this study,on-site measurements were conducted to reveal carbon emission reduction potential of a liquid desiccant system.The results reveal that a carbon emission reduction rate of 10.3%can be achieved by the liquid desiccant system during the cooling season.Due to the characteristics of low humidity difference and huge air volume,the fans account for nearly 50%of the total energy consumption of the system.Energy-efficient operation of the system cannot be achieved without considering the energy-saving in fans.It is indicated that the secondary return air system contributes to system performance improvement,and a recommended air volume ratio between the primary and secondary return air ranges 0.4~1.5.