建筑热能通风空调
建築熱能通風空調
건축열능통풍공조
BUILDING ENERGY & ENVIRONMENT
2014年
2期
6-9,82
,共5页
E nergyPlus%夜间通风%南京地区%节能
E nergyPlus%夜間通風%南京地區%節能
E nergyPlus%야간통풍%남경지구%절능
E nergyPlus%night-tim e ventilation%N anjing%energy-saving
为了对南京地区进行夜间通风的可行性进行预测,选取南京地区某典型办公楼,利用建筑全能耗模拟软件E nergyPlus进行了模拟研究。在典型气象条件下,分别考虑了通风时间,换气次数等因素对室内温湿度及空气比焓的影响。将室内空气焓值的变化等效为空气源热泵空调耗电量,通过对比空调的耗电量与通风风机的耗电量,得出最佳的换气次数,并进行了节能效果分析。结果表明:通风时间选择在室外温度较低的时间段内较为合适。换气次数在不同的通风时间下对应不同的临界点,当换气次数小于临界点的换气次数时,等效空调耗电量大于风机耗电量,此时具有节能效果。当通风时间为6:00~6:30时,换气次数为1~2ac/h时,等效空调的耗电量与风机的耗电量差值的绝对值最大,半小时通风的最大节能达到3.6kW h。
為瞭對南京地區進行夜間通風的可行性進行預測,選取南京地區某典型辦公樓,利用建築全能耗模擬軟件E nergyPlus進行瞭模擬研究。在典型氣象條件下,分彆攷慮瞭通風時間,換氣次數等因素對室內溫濕度及空氣比焓的影響。將室內空氣焓值的變化等效為空氣源熱泵空調耗電量,通過對比空調的耗電量與通風風機的耗電量,得齣最佳的換氣次數,併進行瞭節能效果分析。結果錶明:通風時間選擇在室外溫度較低的時間段內較為閤適。換氣次數在不同的通風時間下對應不同的臨界點,噹換氣次數小于臨界點的換氣次數時,等效空調耗電量大于風機耗電量,此時具有節能效果。噹通風時間為6:00~6:30時,換氣次數為1~2ac/h時,等效空調的耗電量與風機的耗電量差值的絕對值最大,半小時通風的最大節能達到3.6kW h。
위료대남경지구진행야간통풍적가행성진행예측,선취남경지구모전형판공루,이용건축전능모모의연건E nergyPlus진행료모의연구。재전형기상조건하,분별고필료통풍시간,환기차수등인소대실내온습도급공기비함적영향。장실내공기함치적변화등효위공기원열빙공조모전량,통과대비공조적모전량여통풍풍궤적모전량,득출최가적환기차수,병진행료절능효과분석。결과표명:통풍시간선택재실외온도교저적시간단내교위합괄。환기차수재불동적통풍시간하대응불동적림계점,당환기차수소우림계점적환기차수시,등효공조모전량대우풍궤모전량,차시구유절능효과。당통풍시간위6:00~6:30시,환기차수위1~2ac/h시,등효공조적모전량여풍궤적모전량차치적절대치최대,반소시통풍적최대절능체도3.6kW h。
In orderto study the feasibility ofnight-tim e ventilation in Nanjing,a typicaloffice building was selected and building energy sim ulation software EnergyPlus was used to sim ulate.In the typicalweather conditions,considered the ventilation tim e,the air change rate and other factors on the indoor tem perature,hum idity,and enthalpy.The change in enthalpy of the indoor air was equivalentto the power consum ption of source heatpum p air-conditioning,by com paring the energy consum ption in fan power consum ption.The results showthat:ventilation tim e appropriate to selectthe tim e when outdoor tem perature is lower. The air change rate corresponds to different critical point in different ventilation tim e.W hen air change rate is less than that of the critical point,the equivalent air-conditioning power consum ption is greater than the fan power consum ption.Ithas energy-saving effect.W hen the ventilation tim e is from 6:00 to 6:30 am , air change rate is 1~2 ac/h, the absolute difference of equivalent air-conditioning power consum ption and fan power consum ption was m axim um ,energy saving reach 3.6kW h in halfan hour.