重庆地区夜间通风条件下西外墙动态蓄热分析
|
摘要
针对重庆地区高温湿热的气候特征,提出采用贴附射流冷却墙体内壁面的方式进行夜间通风,并进行了实验测试和模拟分析。对比室外气象条件相近的无通风工况和采用贴附射流夜间通风工况的实测结果,分析了夜间通风对墙体壁面温度的影响。通过测试室外气象条件近似、通风速率相同、通风开启时刻不同的2个工况的数据,采用Fluent软件建立非稳态三维模型,计算了西外墙的热流密度和蓄热量。计算结果表明,该夜间通风方式可以有效降低墙体蓄热量。
Considering the hot and humid climate condition in Chongqing,presents a novel night ventilation system using wall attachment jet to cool down the inner surface of walls,and performs an experiment and numerical analysis.Compares the actual results of non-ventilation condition with those of wall attachment jet night ventilation condition at the same outdoor air design condition.Analyses the influence of night ventilation on the surface temperature of the envelope.Tests the data of two conditions at similar weather conditions,same ventilation rate and different ventilation starting time,develops an unsteady 3 D model by Fluent software,and calculates the heat density and thermal storage capacity of the west external wall.The calculation results show that the night ventilation method can effectively reduce the thermal storage of the wall.
Considering the hot and humid climate condition in Chongqing,presents a novel night ventilation system using wall attachment jet to cool down the inner surface of walls,and performs an experiment and numerical analysis.Compares the actual results of non-ventilation condition with those of wall attachment jet night ventilation condition at the same outdoor air design condition.Analyses the influence of night ventilation on the surface temperature of the envelope.Tests the data of two conditions at similar weather conditions,same ventilation rate and different ventilation starting time,develops an unsteady 3 D model by Fluent software,and calculates the heat density and thermal storage capacity of the west external wall.The calculation results show that the night ventilation method can effectively reduce the thermal storage of the wall.
引文
[1]杨艺,邓启红,时冰冰.建筑墙体的延时与削弱作用[J].建筑热能通风空调,2005,24(8):66 70
[2]李峥嵘,曹斌.建筑夜间通风被动冷却技术研究综述及探讨[J].建筑节能,2012,40:6 9
[3]朱新荣,杨柳,刘加平.建筑夜间通风降温研究进展[J].暖通空调,2010,40(6):111 116
[4]王昭俊,易伶俐,高甫生.哈尔滨地区办公建筑夜间机械通风影响因素[J].哈尔滨工业大学学报,2009,41(2):105 111
[5]周军莉,彭畅,胡艳,等.夜间通风实验及计算研究[J].湖南大学学报,2012,39(5):23 27
[6]ARTMANN N,MANZ H,HEISELBERG P.Parameter study on performance of building cooling by night-time ventilation[J].Renewable Energy,2008,33:2589 2598
[7]KOLOKOTRONI M,ARONIS A.Cooling-energy reduction in air-conditioned offices by using night ventilation[J].Applied Energy,1999,63(4):241 253
[8]KUBOTA T,CHYEE D T H,AHMAD S.The effects of night ventilation technique on indoor thermal environment for residential buildings in hothumid climate of Malaysia[J].Energy and Buildings,2009,41(8):829 839
[9]沈艳.重庆自然通风建筑室内热环境实测与模拟分析[D].重庆:重庆大学,2008:48 72
[10]李楠,李百战,沈艳,等.住宅建筑自然通风对室内热环境的影响[J].重庆大学学报,2009,32(7):736 742
[11]罗莉莉,廖显芳,肖益民.重庆市区居住建筑空调季节夜间通风节能潜力分析[J].制冷与空调,2013,27(4):325 328,334
[12]CAUSONE F,CORGNATI S P,FILIPPI M,et al.Experimental evaluation of heat transfer coefficients between radiant ceiling and room[J].Energy and Buildings,2009,41:622 628
[13]JEONG J W,MUMMA S A.Ceiling radiant cooling panel capacity enhanced by mixed convection in mechanically ventilated spaces[J].Applied Thermal Engineering,2003,23:2293 2306
[14]JEONG J W,MUMMA S A.Simplified cooling panel capacity estimation model for top insulated metal ceiling radiant cooling panels[J].Applied Thermal Engineering,2004,24:2055 2072
[15]JEONG J W,MUMMA S A.Practical cooling capacity estimation model for a suspended metal ceiling radiant cooling panel[J].Building and Environment,2007,42(9):3176 3185
[16]VENKO S,DE VENTS D V,ARKAR C,et al.An experimental study of natural and mixed convection over cooled vertical room wall[J].Energy and Buildings,2014,68:387 395
[17]陈良,侯予,习兰.铜康铜热电偶的标定与误差分析[J].低温工程,2008(6):18 23
[2]李峥嵘,曹斌.建筑夜间通风被动冷却技术研究综述及探讨[J].建筑节能,2012,40:6 9
[3]朱新荣,杨柳,刘加平.建筑夜间通风降温研究进展[J].暖通空调,2010,40(6):111 116
[4]王昭俊,易伶俐,高甫生.哈尔滨地区办公建筑夜间机械通风影响因素[J].哈尔滨工业大学学报,2009,41(2):105 111
[5]周军莉,彭畅,胡艳,等.夜间通风实验及计算研究[J].湖南大学学报,2012,39(5):23 27
[6]ARTMANN N,MANZ H,HEISELBERG P.Parameter study on performance of building cooling by night-time ventilation[J].Renewable Energy,2008,33:2589 2598
[7]KOLOKOTRONI M,ARONIS A.Cooling-energy reduction in air-conditioned offices by using night ventilation[J].Applied Energy,1999,63(4):241 253
[8]KUBOTA T,CHYEE D T H,AHMAD S.The effects of night ventilation technique on indoor thermal environment for residential buildings in hothumid climate of Malaysia[J].Energy and Buildings,2009,41(8):829 839
[9]沈艳.重庆自然通风建筑室内热环境实测与模拟分析[D].重庆:重庆大学,2008:48 72
[10]李楠,李百战,沈艳,等.住宅建筑自然通风对室内热环境的影响[J].重庆大学学报,2009,32(7):736 742
[11]罗莉莉,廖显芳,肖益民.重庆市区居住建筑空调季节夜间通风节能潜力分析[J].制冷与空调,2013,27(4):325 328,334
[12]CAUSONE F,CORGNATI S P,FILIPPI M,et al.Experimental evaluation of heat transfer coefficients between radiant ceiling and room[J].Energy and Buildings,2009,41:622 628
[13]JEONG J W,MUMMA S A.Ceiling radiant cooling panel capacity enhanced by mixed convection in mechanically ventilated spaces[J].Applied Thermal Engineering,2003,23:2293 2306
[14]JEONG J W,MUMMA S A.Simplified cooling panel capacity estimation model for top insulated metal ceiling radiant cooling panels[J].Applied Thermal Engineering,2004,24:2055 2072
[15]JEONG J W,MUMMA S A.Practical cooling capacity estimation model for a suspended metal ceiling radiant cooling panel[J].Building and Environment,2007,42(9):3176 3185
[16]VENKO S,DE VENTS D V,ARKAR C,et al.An experimental study of natural and mixed convection over cooled vertical room wall[J].Energy and Buildings,2014,68:387 395
[17]陈良,侯予,习兰.铜康铜热电偶的标定与误差分析[J].低温工程,2008(6):18 23