Performance of underground heat storage system in a double-film-covered greenhouse

Wang, Yongwei; Liang, Xifeng

doi:10.1631/jzus.2006.b0279

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…The simulation results were compared with their previous measured data and were found to be in very good agreement [39]. Wang and Liang [40] reported the performance of underground heat storage systems for greenhouse application by using a GHE. The system was designed to handle low ambient temperature during the nighttime which affected the crops.…”

Section: Agricultural Greenhouse Coolingmentioning

confidence: 57%

A Review of Ground Heat Exchangers for Cooling Application in the Malaysian Climate

2015

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The ground heat exchanger (GHE) is one of the energy sources that has been identified since the 1970s which is able to produce sustainable energy for cooling which is in passive side. GHEs are widely implemented around the world, especially in European countries and a few Asian countries. In Malaysia, application of GHE is still considered as a new passive cooling approach in building energy reduction. Therefore, this paper reviews several important ways of implementing GHE in order to supply passive cooling for any application. The review covers general implementation of the GHE for thermal comfort and agricultural greenhouse cooling. The ground temperature variation used in different researches is also reviewed in this paper as an important part of identifying potential GHE implementations. Design and performance aspects of the GHE are also reviewed. Finally, this paper summarizes the potential and benefit of GHE implementation in the Malaysian climate for cooling applications to reduce the energy used in buildings and greenhouse gas emission.

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Section: Agricultural Greenhouse Coolingmentioning

confidence: 57%

A Review of Ground Heat Exchangers for Cooling Application in the Malaysian Climate

2015

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“…An underground heat storage system in a double-film-covered greenhouse was designed on the basis of plant physiology to reduce the energy consumption in greenhouses. The results showed that the floor temperature was respectively 5.2°C, 4.6°C and 2.0°C higher than that of the soil in the adjacent reference greenhouse after heat storage in clear, cloudy and overcast sky in winter (Wang et al, 2006). Moreover, the temperature and humidity distribution of the canopy in double film solar greenhouse was studied based on computational hydrodynamics, and the simulation results showed high agreement with the measured values (Jiao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on indoor environmental factors of double film solar greenhouse and traditional Chinese greenhouse in cold region

Liu¹,

Liu²,

Chai³

et al. 2022

Energy Exploration & Exploitation

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In order to create a suitable thermal and humidity environment for crop growth in the solar greenhouse, a novel polystyrene foam modular double film solar greenhouse was designed and constructed. The double film solar greenhouse wall adopted polystyrene foam modules, with internal and external supporting frameworks and covering double-layer film, forming a thermal buffer zone which can collect and store solar energy passively. We tested indoor environmental factors variation of the double film solar greenhouse and the ordinary single film greenhouse in winter. Compared with the single film solar greenhouse, results show that the double film solar greenhouse effectively improves the indoor air, soil temperature and CO2 concentration, and reduces the indoor air humidity and soil humidity. The value of environmental factors of light, heat, water and air system in double film greenhouse is more stable than that in single film ordinary greenhouse. It provides a theoretical basis for the construction of double film solar greenhouse and indoor environment regulation.

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A review of upgradation of energy-efficient sustainable commercial greenhouses in Middle East climatic conditions

2021

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Greenhouse farming is considered as one of the most scientific approaches in agriculture, which are suitable for all climatic conditions, especially in Middle East, North America, and Europe. Sustainable greenhouses are innovative farming facilities for healthy vegetables and fruits in a controlled, conditioned indoor space. This article presents a literature review on the upgradation of a conventional to a sustainable greenhouse using modern engineering concept. This includes maintaining fully controlled indoor conditions such as temperature, relative humidity, and air velocity for specific agronomical parameters. The influence and improvements in upgradation of various heating, ventilation, and air-conditioning (HVAC) with the associated control systems and covering materials to reduce the energy consumption have been reviewed. Financial viability of conventional as well as upgraded greenhouses is highlighted. In Middle East climatic conditions, the major challenge is to control the optimal range of temperature (18–21°C), relative humidity (55 to 75%), and air velocity (0–1.3 m/s). It is found that the upgraded HVAC systems with climate control modules can increase the crop yield by 30%. Scientifically selected polycarbonate sheet covering materials are also found to increase the crop yield by up to 15% more than the conventional commercial greenhouses.

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Performance of underground heat storage system in a double-film-covered greenhouse

Cited by 3 publications

References 6 publications

A Review of Ground Heat Exchangers for Cooling Application in the Malaysian Climate

A Review of Ground Heat Exchangers for Cooling Application in the Malaysian Climate

Experimental study on indoor environmental factors of double film solar greenhouse and traditional Chinese greenhouse in cold region

A review of upgradation of energy-efficient sustainable commercial greenhouses in Middle East climatic conditions

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