Method of and apparatus for reducing the heat load on a greenhou

Details Method of and apparatus for reducing the heat load on a greenhou Method of and apparatus for reducing the heat load on a greenhou

1990-09-12

1995-02-28

Gromada, Denise L.

Refrigeration

Processes

Circulating external gas

62271, 237 81, F25D 1706

Patent

active

053926110

ABSTRACT:
A method for controlling the condition of air in an enclosure, such as a greenhouse, containing growing plants involves reducing the heat load on the enclosure by reducing the rate of convective heat flow of air across the canopy of the plants. This is achieved by heating and dehumidifying the air in the greenhouse during periods of low light levels such as at night in a manner that minimizes ventilation for controlling humidity. Apparatus is also provided for controlling the condition of air in an enclosure using an air-brine-vapor direct contact heat exchanger. Regeneration of the brine from the heat exchanger can be achieved by heating the brine using heated air from the enclosure or hot flue gases such that latent heat and/or sensible heat contained in the air, gases, and/or vapor exiting the regenerator can be transferred to the sir in the enclosure.

REFERENCES:
patent: 2017027 (1935-10-01), Forrest
patent: 3949522 (1976-04-01), Kehl et al.
patent: 4305235 (1981-12-01), Roston
patent: 4567732 (1986-02-01), Landstrom et al.
patent: 4685617 (1987-08-01), Assaf
patent: 4819447 (1989-04-01), Assaf
Abstract of Japanese Patent Laid-Open No. 61-19432.
Abstract of Japanese Patent Laid-Open No. Sho 58-201922.
Search Report issued by the Japanese Patent Office regarding Japanese Application No. 2-122765.
European Search Report.
Stranghellini, "Evaporation of a Greenhouse Crop and Its Relationship to the Supply of Heat," Research Report 83-6, Institute of Agricultural Engineering, The Netherlands (Publication date unknown).

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