Performance analysis of an earth–air heat exchanger integrated into an agricultural irrigation system for a greenhouse environmental temperature-control system

Yang, Li-Hao; Huang, Bo-Wun; Hsu, Chien-Yeh; Chen, Sih‐Li

doi:10.1016/j.enbuild.2019.109381

Cited by 36 publications

(7 citation statements)

References 27 publications

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“…In agriculture, EAHE was used to create the suitable air conditions for growing plants in greenhouses and the survival of animals and livestock in their houses in extreme weather conditions. Yang et al [17] analysed the performance of an EAHE system applied in an agricultural greenhouse temperature-control system. Compared with the traditional heat-pump system, they found that 561.6 kWh can be saved through this EAHE system in summer (operating for 90 days), with an energysaving benefit of 74.3%, and 177.6 kWh can be saved in winter (operating for 30 days), with an energy-saving benefit of 67.3%.…”

Section: Eahe Applicationsmentioning

confidence: 99%

A Review – Earth-air Heat Exchanger: Applications, Advances and Challenges

Zeitoun

Lin

Siroux

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Due to global warming and energy security, renewable energy systems became a subject of interest in research. Earth-air heat exchanger is one of these systems that can decrease the primary energy consumption using shallow layers of the ground as a source or sink of heat. Different configurations and designs of EAHEs were under research to assess their performance and find the optimal designs. It is important to identify and classify these designs to further develop innovative research on this topic. This review sheds light on the different classifications of EAHEs and their applications.

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Section: Eahe Applicationsmentioning

confidence: 99%

A Review – Earth-air Heat Exchanger: Applications, Advances and Challenges

Zeitoun

Lin

Siroux

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The use of water for EAHE systems has already been studied with very interesting results. The adjustment of the EAHE for greenhouse heating and cooling in the irrigation channel has been proven to enhance the efficiency of the EAHE system in an experimental work where the system was purposed to operate both for heating and cooling [20]. The cooperation of an EAHE system and evaporative cooling has also been investigated via a thermal model [21].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Performance of an Earth to Air Heat Exchanger for Greenhouse Cooling by the Incorporation of Water Finned Tubes—A Theoretical Approach

et al. 2022

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Proper climatic conditions in greenhouses are one of the major parameters to ensure optimum crop development. The installation of heating and cooling systems are the common solution to form a proper microclimate inside the greenhouse. However, the operation of these systems is accompanied by energy consumption. Therefore, many methods and alternative systems are sought to encounter this issue. A system which has been examined as an alternative solution for full or partial cover of a greenhouse is the Earth to Air Heat Exchanger (EAHE). Up to now, many research works have concentrated on the investigation and operation of such systems. In this study, a method to enhance the efficiency of the EAHE is examined based on the simultaneous flow of water (Water assisted earth to air heat exchanger—WAEAHE) following the concept of a double pipe heat exchanger which has been widely used in other applications. Furthermore, the improvement of the systems’ efficiency is investigated via the application of fins on the internal pipe of the heat exchanger. For the purpose of the study, different case studies have been investigated in order to reach safe results conserving the parameters affecting its efficiency. The results of the theoretical analysis have shown that the application of an internal water pipe can increase the system’s efficiency sufficiently, while it is further increased with the application of fins. In fact, the application of fins can lead to an increase of the overall heat transfer coefficients varying from 36–68%. In the current study, only the energy efficiency of the system was estimated. This system needs to be further investigated to be technically and financially efficient and applicable in actual case studies.

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“…Agricultural greenhouses greatly support the cultivation of crops in a controlled manner, thereby protecting crops from the random effects of natural weather conditions [1][2][3]. The operation of greenhouses is often associated with high heating costs [4,5]. As a result, it is necessary to look for technical and technological solutions that would allow us to optimize the plant production process in greenhouses, and thus reduce the maintenance cost of these facilities.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Effect of Ground Dampness on Heat Transfer between Greenhouse and Ground

Nawalany

Sokołowski

2021

Sustainability

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This paper deals with the problem of the influence of ground dampness on heat exchange between greenhouse and ground. The effect of humidity on the distribution of ground temperature fields was analyzed. The analysis was performed based on the analytical numerical method in the WUFI®plus software. The computational tool was used after a validation process. Research and simulations were conducted on the example of a real single-span greenhouse located in Southern Poland. The results of indoor and outdoor air temperature measurements were used to determine the boundary conditions, while the measured ground temperatures were used to compare with the results of theoretical calculations. Three variants were used for calculation analysis, assuming different levels of ground dampness. Analysis of the test results showed that during the summer period, dry ground provides 8% more thermal energy to the interior of the greenhouse than the damp ground, and provides 30% more thermal energy than wet ground. In the transition period (autumn/spring), the ground temperature fields are arranged parallel to the floor level, while the heat flux is directed from the ground to the interior of the greenhouse, regardless of the ground dampness level. During this period, the ground temperature ranges from 4.0 °C to 13.0 °C. Beneficial effect of dry ground, which contributes to maintaining an almost constant temperature under the greenhouse floor, was found in winter.

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Performance analysis of an earth–air heat exchanger integrated into an agricultural irrigation system for a greenhouse environmental temperature-control system

Cited by 36 publications

References 27 publications

A Review – Earth-air Heat Exchanger: Applications, Advances and Challenges

A Review – Earth-air Heat Exchanger: Applications, Advances and Challenges

Improvement of the Performance of an Earth to Air Heat Exchanger for Greenhouse Cooling by the Incorporation of Water Finned Tubes—A Theoretical Approach

Numerical Analysis of the Effect of Ground Dampness on Heat Transfer between Greenhouse and Ground

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