李明,李涵,宋卫堂,王朝元,岳李炜.基于毛细管网的日光温室主动式集放热系统研究[J].农业机械学报,2019,50(11):341-349.
LI Ming,LI Han,SONG Weitang,WANG Chaoyuan,YUE Liwei.Application of Active Heat System Developed with Capillary Tube Mates in Chinese Solar Greenhouse[J].Transactions of the Chinese Society for Agricultural Machinery,2019,50(11):341-349.
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基于毛细管网的日光温室主动式集放热系统研究   [下载全文]
Application of Active Heat System Developed with Capillary Tube Mates in Chinese Solar Greenhouse   [Download Pdf][in English]
投稿时间:2019-08-23  
DOI:10.6041/j.issn.1000-1298.2019.11.038
中文关键词:  日光温室  毛细管网  主动式集放热系统  外保温复合墙  集放热性能
基金项目:中央高校基本科研业务费专项资金项目(2019TC160)和现代农业产业技术体系建设专项资金项目(CARS-23-C02)
作者单位
李明 中国农业大学 
李涵 中国农业大学 
宋卫堂 中国农业大学 
王朝元 中国农业大学 
岳李炜 中国农业大学 
中文摘要:为了对比日光温室传统保温蓄热后墙与基于毛细管网的主动式集放热系统(AHSCTM)的集放热性能,对AHSCTM的集放热性能进行了测试,构建了AHSCTM水温模型,利用一维差分法对相同环境条件下的外保温复合墙(370mm黏土砖和100mm聚苯乙烯板复合而成)日间储热量和夜间放热量进行了模拟。结果表明,AHSCTM的日间储热量和夜间放热量分别为相同条件下外保温复合墙的84.4%~111.3%和74.8%~100.7%,AHSCTM的COP(Coefficient of performance)为1.1~2.4。在夜间运行期间,AHSCTM放热量是相同时间段内外保温复合墙的98.2%~172.5%。因此,与外保温复合墙相比,AHSCTM有利于提高室内最低气温。改进AHSCTM的日间储热量和夜间放热量得到大幅提升,分别较外保温复合墙高67.6%~112.1%和69.0%~128.3%,COP可达2.8~7.0。改进AHSCTM的储放热性能优于外保温复合墙,说明利用改进AHSCTM配合保温墙体替代传统保温蓄热后墙是可行的。
LI Ming  LI Han  SONG Weitang  WANG Chaoyuan  YUE Liwei
China Agricultural University,China Agricultural University,China Agricultural University,China Agricultural University and China Agricultural University
Key Words:Chinese solar greenhouse  capillary tube mats  active heat system  external insulation composite wall  heat collection and release performance
Abstract:Chinese solar greenhouse (hereafter referred to as solar greenhouse) has been widely applied for growing vegetable during winter with little or without additional heating. The traditional back wall could store heat in the daytime and release heat in the solar greenhouse in the night. It plays an important role in maintaining high indoor air temperature in the solar greenhouse. However, this kind of wall has the disadvantages of high cost and uncontrollable exothermic process. The solar greenhouse with the traditional back wall was easy to show low air temperature in the late night. To solve the problems, it was proposed to replace the traditional back wall by employing the heat insulation back wall and the active heat system, which could collect heat in the daytime and release heat actively in night. The active heat system developed with capillary tube mats (AHSCTM) was developed. The heat collecting and releasing performances of AHSCTM was investigated and compared with the composite wall, which was constructed with 370mm clay brick and 100mm polystyrene board, aiming to test the above proposal. AHSCTM was composed of capillary tube mats installed on the back wall or hanged on the south roof of the solar greenhouse, water tank, water pump and pipes. By circulating water, AHSCTM could collect the heat from the solar radiation intercepted by the capillary tube mats in the daytime and stored in the water tank. And in the night when the air temperature was low, those heat could be recovered to heat the solar greenhouse by circulating water again. According to the test, the heat collected in the daytime and released in the nighttime by AHSCTM were 84.4%~111.3% and 74.8%~100.7% of those collected and released by the composite wall, respectively. The coefficient of performance(COP)of AHSCTM was 1.1~2.4. Nevertheless, during operation of AHSCTM in the nights of solar day, cloudy day and overcast day, the heat released by AHSCTM was 98.2%~172.5% of the composite wall. in the other hands, a dynamical model was developed to simulate the water temperature of the water tank. The results showed that the simulated water temperature agreed well with the measured water temperature. This model can be used to improve the heat collecting and releasing performances of AHSCTM. Based on this model, ASHCTM can be improved by lengthening the capillary tube and increasing the number of capillary tubes in each mat. Then, the heat collected in the daytime and released in the nighttime by the improved AHSCTM were 67.6%~112.1% and 69.0%~128.3% of the composite wall respectively. COP of the improved AHSCTM was 2.8~7.0. During operation of AHSCTM in the nights of solar day, cloudy day and overcast day, the heat released by AHSCTM was 2.5~5.1 times of that of the composite wall. Thus, it was feasible to replace the composite wall in the solar greenhouse by employing the improved AHSCTM and the insulation back wall.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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