摘要
利用日光温室提供主动蓄热体参数研究所需的环境条件,测试了不同风速、空气温度以及空气-土壤温度差对主动蓄热体内空气-土壤热交换系统的管道内部温度、进出口温差以及蓄放热能力的影响规律,以期获得主动蓄热体内部管道通风系统的传热效率及优化调控参数。结果表明:同一风速条件下,进出口温差随室内空气温度增加而增加。放热阶段,当进风口以风速0.5～4.0m·s^(-1)运行时,系统放热量随着风速增加而增加,平均放热流量为9.8～73.9 W;蓄热阶段,当进风口以风速0.5～2.0m·s^(-1)运行时,系统蓄热量随风速增加而增加,平均蓄热流量为21.4～70.2 W,当进风口以风速2.0、4.0m·s^(-1)运行时,平均蓄热流量仅相差2.7 W,性能系数COP相差不大。同一风速条件下,随着室内空气-土壤温度差值不断增大,进出风口温差也不断增加,同时建议白天风机开启蓄热时设定的室内空气温度最少应该比蓄热体内土壤温度高4.5℃。
The solar greenhouse was used to provide the environmental conditions required for the study.The fluences of different wind speeds,air temperatures,and air-soil temperature differences on internal temperature inside the pipeline,inlet and outlet temperature difference and heat storage and release capacity of air-soil heat exchange system(ASHES)in the active heat storage body were tested.In order to get the heat transfer efficiency and optimize the control parameters of the air heat exchange system inside the active heat storage body.The results showed that the inlet and outlet temperature difference increased with the increase of indoor air temperature under the same wind speed conditions.In the heat release stage,when wind speed of air inlet was 0.5-4.0m·s^-1,the heat release of ASHES increased with the increasing of wind speed,the average heat flow was 9.8-73.9 W.In the heat storage stage,when wind speed of air inlet was 0.5-2.0m·s^-1,the heat storage of ASHES increased with the increasing of wind speed,the average heat flow was 21.4-70.2 W.When wind speed of air inlet were 2.0m·s^-1 and 4.0m·s^-1,respectively,the average difference of heat flow was 2.7 W,and coefficients of performance(COP)of different winds were not much different.At the same wind speed,the inlet and outlet temperature difference was increasing with the increasing of indoor air-soil temperature difference,and it was recommended that the indoor air temperature set when the fan was turned on during the day should be at least 4.5°C higher than the heat storage body soil temperature.
作者
曹晏飞
周海渊
鲍恩财
蒋程瑶
孙亚琛
邹志荣
CAO Yanfei;ZHOU Haiyuan;BAO Encai;JIANG Chengyao;SUN Yachen;ZOU Zhirong(College of Horticulture,Northwest A&F University/Key Laboratory of Protected Horticultural Engineering in Northwest,Ministry of Agriculture,Yangling,Shaanxi 712100)
出处
《北方园艺》
CAS
北大核心
2019年第3期84-93,共10页
Northern Horticulture
基金
现代农业产业技术体系建设专项资金资助项目(CARS-23-C05)
宁夏回族自治区重点研发计划重大资助项目(2016BZ0901)
陕西省科技统筹创新工程资助项目(2016KTCL02-02)
关键词
日光温室
主动蓄热体
空气-土壤热交换系统
风速
温差
热流量
solar greenhouse
active heat storage body
air-soil heat exchange system
wind speed
temperature difference
heat flux
