Performance of a new active solar heat storage–release system for Chinese assembled solar greenhouses used in high latitudes and cold regions

Xia, Tianyang; Li, Yiming; Wu, Xiaoyang; Fan, Zilong; Shi, Wenbin; Liu, Xingan; Li, Tianlai

doi:10.1016/j.egyr.2021.12.005

Cited by 22 publications

(13 citation statements)

References 50 publications

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“…Researchers have developed many active and passive heating systems to utilize surplus air heat energy or both excess solar radiation and air heat inside CSGs. The active solar heat storage-release systems are the most studied, which transfer and store energy through water circulation [34][35][36][37][38]. They focused on improving the heat collection efficiency of indoor collectors while considering the heat release capacity.…”

Section: Research Background and Problem Definitionmentioning

confidence: 99%

“…Where COPgC = 4.5 is the COP of the heat pump taking CSG surplus air heat as the heat source, not considering the power consumption of water pumps [46]; TDgC = 5 h is assigned running time of the heat pump under CSG air source heating condition [34,36,37], and TDg = 13 h is assigned time duration for heating the multi-span greenhouse in a 24-hour cycle. This formula ignores the difference of heat pump input powers between the rated and the CSG air source conditions due to the lack of data (the same below).…”

Section: Heat Pumpmentioning

confidence: 99%

“…The attainable maximum water tank temperature is higher than that achieved by the active solar heat storage-release systems [37,38] and water-flowing roof skeleton network [41], which had a range of 20-26℃. Some other water cycling systems, with improved collector and optimized heat storage volume, can also raise the water temperature to around 35℃ [34][35][36].…”

Section: Running Statusmentioning

confidence: 99%

“…Adding different heat collection devices will change the surplus air heat to varying degrees. It is not easy to measure the accurate surplus air heat inside In previous tests, the CSG excess heat could be harvested at a maximum daily average rate of 42-53 W m -2[36,37], indicating that the simulations are satisfactory in guiding the design of CSG energy utilization systems, at least from a qualitative point of view.…”

mentioning

confidence: 95%

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Greenhouse heating by energy transfer between greenhouses: System design and implementation

Sun

Wei²,

Zhou³

et al. 2022

Applied Energy

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Section: Research Background and Problem Definitionmentioning

confidence: 99%

Section: Heat Pumpmentioning

confidence: 99%

Section: Running Statusmentioning

confidence: 99%

mentioning

confidence: 95%

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Greenhouse heating by energy transfer between greenhouses: System design and implementation

Sun

Wei²,

Zhou³

et al. 2022

Applied Energy

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“…However, the construction cost of traditional solar greenhouses is high, and the construction of walls also takes much time. With the development of the theory of active heat storage and release, a whole steel frame solar greenhouse has been proposed in recent years 16 . This greenhouse structure is composed of a south roof, a north roof and columns.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response analysis of a whole steel frame solar greenhouse under wind loads

Wang

Jiang

et al. 2022

Sci Rep

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In recent years, whole steel frame steel greenhouses have become increasingly prevalent. With the characteristics of large flexibility and small mass, whole steel frame steel greenhouses are sensitive to wind loads. However, studies on the safety of whole steel frame steel greenhouses under wind loads are still limited. In this study, a 10 m span whole steel frame solar greenhouse was taken as the research objective. Taking the Davenport spectrum as the target spectrum, the time history of the wind speed was simulated by the harmonic superposition method. The finite element model of the greenhouse structure was established using ANSYS software. The simulated wind pressure was applied on the greenhouse structure for dynamic response analysis. The dynamic response results were compared with the static analysis results under average wind load. The results showed that the greenhouse structure mainly bears bending stress under wind load. The bending stress, axial stress and displacement of the greenhouse skeleton under average wind loads are lower than those under instantaneous wind loads. It is necessary to consider the dynamic characteristics of wind loads in the design of solar greenhouses. A wind-induced vibration coefficient is obtained, which can be used to convert the dynamic load into the equivalent static load and improve its design efficiency.

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Performance study of an active solar water curtain heating system for Chinese solar greenhouse heating in high latitudes regions

Xia

Sun

et al. 2023

Applied Energy

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Performance of a new active solar heat storage–release system for Chinese assembled solar greenhouses used in high latitudes and cold regions

Cited by 22 publications

References 50 publications

Greenhouse heating by energy transfer between greenhouses: System design and implementation

Greenhouse heating by energy transfer between greenhouses: System design and implementation

Dynamic response analysis of a whole steel frame solar greenhouse under wind loads

Performance study of an active solar water curtain heating system for Chinese solar greenhouse heating in high latitudes regions

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