A water-curtain heating system for plastic greenhouses

Meneses, J.F.; Canham, A. E.

doi:10.1016/0021-8634(92)80060-6

Cited by 3 publications

(5 citation statements)

References 5 publications

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“…The light transmission through the construction has not been evaluated during these tests. The water layer is not expected to influence the light transmittance much as previously reported [51,8], but moist or ice…”

Section: Limitationssupporting

confidence: 55%

“…A similar system with demineralized water was measured in 1983 by Chiapale et al [22], focussing on the development and validation of a simulation model. The absence of interior condensation or ice formation maximize the solar transmittance, however Meneses and Canham [8] found that the transmittance was reduced severely by condensed water if the flutes were drained. Recommended water flow rate for enclosed water curtain constructions is between 0.0056 and 0.0083 l⋅s − 1 ⋅m − 2 [23].…”

Section: Water Curtain Technologiesmentioning

confidence: 99%

“…This study accumulating on the inside of the outer foil will reduce the light transmission. Meneses and Canham [8] reported a light transmittance reduction of 1 % for water filled double-skinned polycarbonate, but after draining a reduction in solar transmission of 10 % is reported due to remaining water drops and condensation inside the flutes.…”

Section: Tablementioning

confidence: 99%

“…A greenhouse external water curtain heating system involves the flow of water along the outside of the greenhouse envelope for either cooling [1,2] or heating [3,4] allowing heating of the greenhouse by low water temperatures, enabling use of residual heat or waste heat sources that can be used at none or low cost. There are also attempts with water curtains enclosed between two foils [5,6] or enclosed in the flutes of double sheet plastic [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Low temperature heating system for greenhouses based on enclosed water curtain and liquid foam insulation

Persson

Chaillou

Huang

2022

Sustainable Energy Technologies and Assessments

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Section: Limitationssupporting

confidence: 55%

Section: Water Curtain Technologiesmentioning

confidence: 99%

Section: Tablementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low temperature heating system for greenhouses based on enclosed water curtain and liquid foam insulation

Persson

Chaillou

Huang

2022

Sustainable Energy Technologies and Assessments

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“…At this time, the specific capacity of 234 groundwater pumping wells was reduced by >20% (Table 4). Based on both PAT and API indexes, groundwater pumping rates in most of the study area decreased, which is expected to significantly reduce the thermal benefit applied to water-curtain greenhouses by groundwater pumping [39,40]. Water supply alternatives are needed if weirs are to be operated efficiently in areas concerned with difficult groundwater use.…”

Section: Effects Of Opening Of the Weir On Seasonal Groundwater Usementioning

confidence: 99%

Effects of Weir Operation on Seasonal Groundwater Use: A Case Study of the Han River, South Korea

Lee

Kim

et al. 2022

Water

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During the cold dry season, a large amount of groundwater is pumped for water-curtain cultivation in agricultural fields mostly located near the four major rivers of South Korea. Several weirs, installed previously to secure sufficient water resources from these rivers, were opened in 2017 for restoring the riverine environment. Weir-controlled river level fluctuations have altered stream–aquifer interactions, leading to groundwater drawdown. In this study, changes in stream–aquifer interaction caused by seasonal pumping and weir opening were investigated, using Visual MODFLOW. Two indexes that considered the pump type and aquifer characteristics—the pumping available thickness (PAT) and aquifer productivity index (API)—were used to analyze the effects of weir opening on seasonal groundwater use. Our simulations indicated that weir opening had a large impact on seasonal groundwater use due to groundwater drawdown, especially with respect to centrifugal pumps located in low transmissivity areas where the API decreased after the weir was opened. The resulting decrease in groundwater pumping rates would lower the thermal effect of the water-curtain greenhouse process. This indicates that water supply alternatives are needed so that the weirs can be operated efficiently and field requirements can be met, while the deleterious effects on groundwater are avoided.

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Evaluation of optimal water flow and temperature in response to outdoor air temperature in plastic greenhouse with recirculated water curtain system

et al. 2017

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A water-curtain heating system for plastic greenhouses

Cited by 3 publications

References 5 publications

Low temperature heating system for greenhouses based on enclosed water curtain and liquid foam insulation

Low temperature heating system for greenhouses based on enclosed water curtain and liquid foam insulation

Effects of Weir Operation on Seasonal Groundwater Use: A Case Study of the Han River, South Korea

Evaluation of optimal water flow and temperature in response to outdoor air temperature in plastic greenhouse with recirculated water curtain system

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