Comparative thermoeconomic assessment of renewable-driven hybrid-cooled sustainable greenhouses for subtropical regions

Abedrabboh, Omer; Koç, Muammer; Biçer, Yusuf

doi:10.1016/j.enconman.2023.117990

Cited by 8 publications

(2 citation statements)

References 43 publications

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“…It has always been challenging to regulate greenhouse humidity in an energy-efficient and cost-effective manner. The current solutions include both cultural practices such as precise watering, adequate place spacing, and weed controlling and passive and active ventilation methods. − Passive ventilation replaces the high-humid inside air with the low-humid outside air by opening and closing the glazing manually, facing problems of time-consuming, labor-intensive, and operator-dependent . Active ways for humidity control include heat pump, , desiccants, − and heat exchangers. , Heat pumps have been reported to be effective as they condense the moisture in the air with evaporator coils.…”

Section: Introductionmentioning

confidence: 99%

Smart Glazing for Energy- and Cost-Efficient Greenhouse Humidity Regulation

Weng,

Khater,

Paley

et al. 2024

ACS Sustainable Chem. Eng.

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Global food shortage demands significant progress in crop production. Greenhouses offer a solution for higher crop production by providing a controllable environment. Excess levels of humidity, however, encourage pests and diseases, drastically reducing crop yields. Traditional humidity control methods for greenhouses are expensive and energy-intensive. In addition to this, nonbiodegradable plastic covers cause massive white pollution. To tackle these concerns, we present smart glazing and sensors for greenhouse humidity regulation through both passive and active paths. We created biodegradable humidity-sensitive films by blending poly(ethylene glycol) (PEG) with cellulose acetate (CA). PEG/CA covers can automatically open for air circulation at high humidity, successfully demonstrating repeatable greenhouse humidity regulation to as low as 60% relative humidity. PEG/CA-based humidity sensors can actively accelerate air circulation and humidity reduction with repeated cycles at an even higher efficiency. Overall, our research introduces a low-cost, all-in-one, sustainable, and environmentally conscious solution for addressing the greenhouse humidity control challenges. Approximately, this solution can potentially achieve annual energy savings of up to 56.6 GWh for the U.S. if fully applied.

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Section: Introductionmentioning

confidence: 99%

Smart Glazing for Energy- and Cost-Efficient Greenhouse Humidity Regulation

Weng,

Khater,

Paley

et al. 2024

ACS Sustainable Chem. Eng.

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“…This is because, in the greenhouse, growing conditions can be better observed and controlled. This significantly improves out-of-season crop production and increases crop yields [2]. However, during the hot season, the heat input into the greenhouse causes the internal temperature to increase and exceed the optimum value [3].…”

Section: Introductionmentioning

confidence: 99%

Determination of Performance of Different Pad Materials and Energy Consumption Values of Direct Evaporative Cooler

Jakubowski,

Boyacı,

Kocięcka

et al. 2024

Energies

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The purpose of this study is to determine the performances of luffa and greenhouse shading netting (which can be used as alternatives to commercial cellulose pads, that are popular for cooling greenhouses), the contribution of external shading to the evaporative cooling performance, and the energy consumption of the direct evaporative cooler. In this experiment, eight different applications were evaluated: natural ventilation (NV), natural ventilation combined with external shading net (NV + ESN), cellulose pad (CP), cellulose pad combined with external shading net (CP + ESN), luffa pad (LP), luffa pad combined with external shading net (LP + ESN), shading net pad (SNP), and shading net pad combined with external shading net (SNP + ESN). The cooling efficiencies of CP, CP + ESN, LP, LP + ESN, SNP, and SNP + ESN were found to be 37.6%, 45.0%, 38.9%, 41.2%, 24.4%, 29.1%, respectively. Moreover, their cooling capacities were 2.6 kW, 3.0 kW, 2.8 kW, 3.0 kW, 1.7 kW, 2.0 kW, respectively. The system water consumption values were 2.9, 3.1, 2.8, 3.2, 2.4, 2.4 l h−1, respectively. The performance coefficients of the system were determined to be 10.2, 12.1, 11.3, 11.9, 6.6, 7.8. The system’s electricity consumption per unit area was 0.15 kWh m−2. As a result of the study, it was determined that commercially used cellulose pads have advantages over luffa and shading net materials. However, luffa pads can be a good alternative to cellulose pads, considering their local availability, initial cost, cooling efficiency, and capacity.

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