将微热管阵列应用于建筑一体化光伏光热(BIPVT)组件,设计了多能互补耦合热泵供能系统,实现了太阳能与空气能高效互补利用,并搭建了新型BIPVT超低能耗建筑。同时建立了BIPVT建筑的仿真模型,并将其与BIPV幕墙建筑和普通参考建筑的产能与...将微热管阵列应用于建筑一体化光伏光热(BIPVT)组件,设计了多能互补耦合热泵供能系统,实现了太阳能与空气能高效互补利用,并搭建了新型BIPVT超低能耗建筑。同时建立了BIPVT建筑的仿真模型,并将其与BIPV幕墙建筑和普通参考建筑的产能与用能进行模拟与对比分析。结果表明,新型BIPVT建筑全年累计空调负荷为3033 k W·h,相对于BIPV幕墙,建筑负荷降低了32.9%。相对于参考建筑,负荷增加了8.6%。新型BIPVT建筑能耗综合值为113.5 k W·h/(m^(2)·a),相对于BIPV幕墙和普通墙体围护结构,新型BIPVT建筑综合节能率分别为38.5%和62.2%。本研究为超低能耗建筑的应用提供了新的技术方法与理论依据。展开更多
提出了1种可再生能源多能互补协同蓄能建筑供能系统,该系统将空气源热泵、水源热泵、太阳能热电联供组件以及蓄能技术有效结合,通过夜间蓄能白天供能,实现可再生能源的高效利用与节能经济运行。系统测试结果表明,夏季典型日工况时在夜...提出了1种可再生能源多能互补协同蓄能建筑供能系统,该系统将空气源热泵、水源热泵、太阳能热电联供组件以及蓄能技术有效结合,通过夜间蓄能白天供能,实现可再生能源的高效利用与节能经济运行。系统测试结果表明,夏季典型日工况时在夜间蓄能模式下机组平均性能系数(coefficent of performance, COP)为3.2,水箱的蓄冷量可以满足用户在白天峰电时段的需求。冬季典型日工况时夜间为空气源热泵耦合水源热泵制热蓄能模式,系统平均COP为2.3且能将蓄能水箱提升至57.5℃,蓄能水箱的蓄热量可满足办公建筑全天的供热需求。通过对系统性能评价可知,该系统冬夏季运行均能达到设计要求,性能较好,且蓄能评价指标均满足T/CECS 799-2021《蓄能空调工程测试与评价技术规程》推荐限值。系统冬夏季的系统综合效率分别为2和2.45,单位蓄能消耗费用分别为0.16和0.14元/kW·h,运行费用约是常规空气源热泵直供系统的55%,表明该系统设计合理且运行高效,是值得推广应用的可再生能源高效利用技术。展开更多
This paper introduces a novel flat plate solar collector(FPC) using micro heat pipe array(MHPA) as a key element.To analyze the thermal transfer behavior of flat plate solar collector with micro heat pipe array(MHPA-F...This paper introduces a novel flat plate solar collector(FPC) using micro heat pipe array(MHPA) as a key element.To analyze the thermal transfer behavior of flat plate solar collector with micro heat pipe array(MHPA-FPC),an indoor experiment for thermal transfer characteristic of MHPA applied to FPC was conducted by using an electrical heating film to simulate the solar radiation.Different cooling water flow rates,cooling water temperatures,slopes,and contact thermal resistances between the condenser of MHPA and the heat exchanger were tested at different heating powers.The experimental results indicate that MHPA-FPC exhibits the enhanced heat transfer capability with increased cooling water flow rate and temperature.Total thermal resistance has a maximum decline of approximately 10% when the flow rate increases from 180 to 360 L h 1 and 38% when the cooling water temperature increases from 20℃ to 40℃.When the inclination angle of MHPA-FPC exceeds 30°,the slope change has a negligible effect on the heat transfer performance of MHPA-FPC.In addition,contact thermal resistance significantly affects the heat transfer capability of MHPA-FPC.The total thermal resistances lowers to nearly half of the original level when contact material between the condenser of MHPA and the heat exchanger changes from conductive silicone to conductive grease.These results could provide useful information for the optimal design and operation of MHPA-FPC.展开更多
文摘将微热管阵列应用于建筑一体化光伏光热(BIPVT)组件,设计了多能互补耦合热泵供能系统,实现了太阳能与空气能高效互补利用,并搭建了新型BIPVT超低能耗建筑。同时建立了BIPVT建筑的仿真模型,并将其与BIPV幕墙建筑和普通参考建筑的产能与用能进行模拟与对比分析。结果表明,新型BIPVT建筑全年累计空调负荷为3033 k W·h,相对于BIPV幕墙,建筑负荷降低了32.9%。相对于参考建筑,负荷增加了8.6%。新型BIPVT建筑能耗综合值为113.5 k W·h/(m^(2)·a),相对于BIPV幕墙和普通墙体围护结构,新型BIPVT建筑综合节能率分别为38.5%和62.2%。本研究为超低能耗建筑的应用提供了新的技术方法与理论依据。
文摘提出了1种可再生能源多能互补协同蓄能建筑供能系统,该系统将空气源热泵、水源热泵、太阳能热电联供组件以及蓄能技术有效结合,通过夜间蓄能白天供能,实现可再生能源的高效利用与节能经济运行。系统测试结果表明,夏季典型日工况时在夜间蓄能模式下机组平均性能系数(coefficent of performance, COP)为3.2,水箱的蓄冷量可以满足用户在白天峰电时段的需求。冬季典型日工况时夜间为空气源热泵耦合水源热泵制热蓄能模式,系统平均COP为2.3且能将蓄能水箱提升至57.5℃,蓄能水箱的蓄热量可满足办公建筑全天的供热需求。通过对系统性能评价可知,该系统冬夏季运行均能达到设计要求,性能较好,且蓄能评价指标均满足T/CECS 799-2021《蓄能空调工程测试与评价技术规程》推荐限值。系统冬夏季的系统综合效率分别为2和2.45,单位蓄能消耗费用分别为0.16和0.14元/kW·h,运行费用约是常规空气源热泵直供系统的55%,表明该系统设计合理且运行高效,是值得推广应用的可再生能源高效利用技术。
基金financially supported by the Natural Science Foundation of Beijing(Grant No.Z1004020201201)the Opening Funds of State Key Laboratory of Building Safety and Build Environment of China(Grant No.BSBE 2011-07)
文摘This paper introduces a novel flat plate solar collector(FPC) using micro heat pipe array(MHPA) as a key element.To analyze the thermal transfer behavior of flat plate solar collector with micro heat pipe array(MHPA-FPC),an indoor experiment for thermal transfer characteristic of MHPA applied to FPC was conducted by using an electrical heating film to simulate the solar radiation.Different cooling water flow rates,cooling water temperatures,slopes,and contact thermal resistances between the condenser of MHPA and the heat exchanger were tested at different heating powers.The experimental results indicate that MHPA-FPC exhibits the enhanced heat transfer capability with increased cooling water flow rate and temperature.Total thermal resistance has a maximum decline of approximately 10% when the flow rate increases from 180 to 360 L h 1 and 38% when the cooling water temperature increases from 20℃ to 40℃.When the inclination angle of MHPA-FPC exceeds 30°,the slope change has a negligible effect on the heat transfer performance of MHPA-FPC.In addition,contact thermal resistance significantly affects the heat transfer capability of MHPA-FPC.The total thermal resistances lowers to nearly half of the original level when contact material between the condenser of MHPA and the heat exchanger changes from conductive silicone to conductive grease.These results could provide useful information for the optimal design and operation of MHPA-FPC.
