不同建筑分层空调系统风口布置的优化研究
|
摘要
通过实验数据验证数学模型后,模拟研究了分层空调系统应用于不同类型建筑空间时风口布置对环境热舒适性和系统节能潜力的影响。结果表明:当分层空调系统应用于小型建筑空间时,需要注意回风口的诱导作用对室内气流组织的影响,避免形成"冷量短路"现象而引起热舒适问题;当分层空调系统应用于水平跨度较大的高大建筑空间时,应尽可能将送风口围绕人体活动区域均匀布置,以提高建筑下部空间气流组织的均匀性和环境热舒适性;将回风口布置在人体活动区域温度较低的位置,能够有效减小分层空调系统的制冷机组负荷;同时,增强室内空气沿外围护结构的贴附热羽流流动,也有利于提高系统的节能潜力。
With a validated simulation model,investigates the influence of diffuser layout on the thermal comfort and energy saving potential of stratified air distribution(STRAD)systems applied to different types of building spaces.The results indicate that for small buildings,the induction effect of the return air inlets on the indoor air distribution should be noticed to avoid the thermal comfort problems caused by"short circuit"phenomenon of the cold air.But for large space buildings with wide horizontal span,air supply diffusers should be arranged surrounding the occupied zone as uniform as possible,so as to improve the uniformity of the indoor air distribution and the thermal comfort in the lower zone.The return air inlets should be designed to the low air temperature area of lower occupied zone,in order to reduce the cooling load and improve the energy saving capacity of the STRAD systems. Furthermore,the enhancement of the thermal plume flow along with exterior walls is beneficial for further energy conservation of the STRAD systems.
With a validated simulation model,investigates the influence of diffuser layout on the thermal comfort and energy saving potential of stratified air distribution(STRAD)systems applied to different types of building spaces.The results indicate that for small buildings,the induction effect of the return air inlets on the indoor air distribution should be noticed to avoid the thermal comfort problems caused by"short circuit"phenomenon of the cold air.But for large space buildings with wide horizontal span,air supply diffusers should be arranged surrounding the occupied zone as uniform as possible,so as to improve the uniformity of the indoor air distribution and the thermal comfort in the lower zone.The return air inlets should be designed to the low air temperature area of lower occupied zone,in order to reduce the cooling load and improve the energy saving capacity of the STRAD systems. Furthermore,the enhancement of the thermal plume flow along with exterior walls is beneficial for further energy conservation of the STRAD systems.
引文
[1]林章,周天泰,曾志宽.层式通风——高温空调下的出路[J].化工学报,2008,59(增刊2):235-241
[2]王超,赵彬,杨旭东.一种评价挥发性有机物污染水平的室内空气质量健康指数[J].中南大学学报(自然科学版),2014,45(6):2099-2104
[3]ASHRAE.Ventilation for acceptable indoor air quality:ASHRAE standard 62.1-2010[S].Atlanta:ASHRAE Inc,2010:1962-1989
[4]张恺,张小松,李舒宏.地板送风空调系统静压箱热衰减特性[J].东南大学学报(自然科学版),2015,45(4):720-727
[5]LIN Z,CHOW T T,FONG K F,et al.Comparison of performances of displacement and mixing ventilations:part I:thermal comfort[J].International Journal of Refrigeration,2005,28(2):288-305
[6]LEE K S,ZHANG T,JIANG Z,et al.Air distribution effectiveness with stratified air distribution systems[G]∥ASHRAE Trans,2009,115(2):322-333
[7]LIN Z,LEE C K,FONG S,et al.Comparison of annual energy performances with different ventilation methods for cooling[J].Energy and Buildings,2011,43(1):130-136
[8]HASHIMOTO Y,YONEDA H.Numerical study on the influence of a ceiling height for displacement ventilation[C]∥The 11th International IBPSA Conference.Glasgow,Scotland,2009:1045-1052
[9]KAYE N B,HUNT G R.The effect of floor heat source area on the induced airflow in a room[J].Building and Environment,2010,45(4):839-847
[10]LIU Q A,LINDEN P L.The fluid dynamics of an underfloor air distribution system[J].Journal of Fluid Mechanics,2006,554:323-341
[11]BAUMAN F.Underfloor air distribution(UFAD)design guide[M].Atlanta:ASHRAE Inc,2003:28-30
[12]AWAD A S,CALAY R K,BARDRAN O O,et al.An experimental study of stratified flow in enclosures[J].Applied Thermal Engineering,2008,28(17/18):2150-2158
[13]HOLMBERG S,CHEN Q.Air flow and particle control with different systems in a classroom[J].Indoor Air,2003,13(2):200-204
[14]LAU J,NIU J L.Measurements and CFD simulation of the temperature stratification in an atrium using a floor level air supply method[J].Indoor and Built Environment,2003,12(4):265-280
[15]XU H T,GAO N P,NIU J L.A method to generate effective cooling load factors for stratified air distribution systems using a floor-level air supply[J].HVAC&R Research,2009,15(5):915-930
[16]程远达,张兴惠,景胜蓝,等.风口布置对分层空调系统节能潜力及头脚温差的影响[J].暖通空调,2016,46(6):116-121
[17]CHENG Y D,NIU J L,GAO N P.Stratified air distribution systems in a large lecture theatre:a numerical method to optimize thermal comfort and maximize energy saving[J].Building and Environment,2012,55:515-525
[18]杨毅,曹志刚,丁德,等.夏热冬冷地区大型剧场建筑空调系统设计难点及分析[J].暖通空调,2013,43(9):2-4
[19]ASHRAE.Thermal environmental conditions for human occupancy:ASHRAE standard 55-2010[S].Atlanta:ASHRAE Inc,2010:145-158
[20]SKISTAD H,MUNDT E,NIELSEN P V,et al.Displacement ventilation in non-industrial premises[M].Belgium:Federation of European Heating,Ventilation and Air-conditioning Associations,2002:12-13
[21]ZHANG H,HUIZENGA C,ARENS E,et al.Modeling thermal comfort in stratified environments[C]∥The 10th International Conference on Indoor Air Quality and Climate.Beijing,2005:133-137
[22]ZHANG H,ARENS E,HUIZENGA C.Thermal sensation and comfort models for non-uniform and transient environments:part I:local sensation of individual body parts[J].Building and Environment,2010,45(2):380-388
[23]ZHANG H,ARENS E,HUIZENGA C.Thermal sensation and comfort models for non-uniform and transient environments:partⅡ:local comfort of individual body parts[J].Building and Environment,2010,45(2):389-398
[24]黄晨,李美玲.大空间建筑室内垂直温度分布的计算方法[J].暖通空调,1999,29(5):28-33
[2]王超,赵彬,杨旭东.一种评价挥发性有机物污染水平的室内空气质量健康指数[J].中南大学学报(自然科学版),2014,45(6):2099-2104
[3]ASHRAE.Ventilation for acceptable indoor air quality:ASHRAE standard 62.1-2010[S].Atlanta:ASHRAE Inc,2010:1962-1989
[4]张恺,张小松,李舒宏.地板送风空调系统静压箱热衰减特性[J].东南大学学报(自然科学版),2015,45(4):720-727
[5]LIN Z,CHOW T T,FONG K F,et al.Comparison of performances of displacement and mixing ventilations:part I:thermal comfort[J].International Journal of Refrigeration,2005,28(2):288-305
[6]LEE K S,ZHANG T,JIANG Z,et al.Air distribution effectiveness with stratified air distribution systems[G]∥ASHRAE Trans,2009,115(2):322-333
[7]LIN Z,LEE C K,FONG S,et al.Comparison of annual energy performances with different ventilation methods for cooling[J].Energy and Buildings,2011,43(1):130-136
[8]HASHIMOTO Y,YONEDA H.Numerical study on the influence of a ceiling height for displacement ventilation[C]∥The 11th International IBPSA Conference.Glasgow,Scotland,2009:1045-1052
[9]KAYE N B,HUNT G R.The effect of floor heat source area on the induced airflow in a room[J].Building and Environment,2010,45(4):839-847
[10]LIU Q A,LINDEN P L.The fluid dynamics of an underfloor air distribution system[J].Journal of Fluid Mechanics,2006,554:323-341
[11]BAUMAN F.Underfloor air distribution(UFAD)design guide[M].Atlanta:ASHRAE Inc,2003:28-30
[12]AWAD A S,CALAY R K,BARDRAN O O,et al.An experimental study of stratified flow in enclosures[J].Applied Thermal Engineering,2008,28(17/18):2150-2158
[13]HOLMBERG S,CHEN Q.Air flow and particle control with different systems in a classroom[J].Indoor Air,2003,13(2):200-204
[14]LAU J,NIU J L.Measurements and CFD simulation of the temperature stratification in an atrium using a floor level air supply method[J].Indoor and Built Environment,2003,12(4):265-280
[15]XU H T,GAO N P,NIU J L.A method to generate effective cooling load factors for stratified air distribution systems using a floor-level air supply[J].HVAC&R Research,2009,15(5):915-930
[16]程远达,张兴惠,景胜蓝,等.风口布置对分层空调系统节能潜力及头脚温差的影响[J].暖通空调,2016,46(6):116-121
[17]CHENG Y D,NIU J L,GAO N P.Stratified air distribution systems in a large lecture theatre:a numerical method to optimize thermal comfort and maximize energy saving[J].Building and Environment,2012,55:515-525
[18]杨毅,曹志刚,丁德,等.夏热冬冷地区大型剧场建筑空调系统设计难点及分析[J].暖通空调,2013,43(9):2-4
[19]ASHRAE.Thermal environmental conditions for human occupancy:ASHRAE standard 55-2010[S].Atlanta:ASHRAE Inc,2010:145-158
[20]SKISTAD H,MUNDT E,NIELSEN P V,et al.Displacement ventilation in non-industrial premises[M].Belgium:Federation of European Heating,Ventilation and Air-conditioning Associations,2002:12-13
[21]ZHANG H,HUIZENGA C,ARENS E,et al.Modeling thermal comfort in stratified environments[C]∥The 10th International Conference on Indoor Air Quality and Climate.Beijing,2005:133-137
[22]ZHANG H,ARENS E,HUIZENGA C.Thermal sensation and comfort models for non-uniform and transient environments:part I:local sensation of individual body parts[J].Building and Environment,2010,45(2):380-388
[23]ZHANG H,ARENS E,HUIZENGA C.Thermal sensation and comfort models for non-uniform and transient environments:partⅡ:local comfort of individual body parts[J].Building and Environment,2010,45(2):389-398
[24]黄晨,李美玲.大空间建筑室内垂直温度分布的计算方法[J].暖通空调,1999,29(5):28-33
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |