Method of preventing frost damage of vegetation

Details Method of preventing frost damage of vegetation Method of preventing frost damage of vegetation

1983-07-25

1985-01-29

Hafer, Robert A.

Plant husbandry

Frost preventing

165 46, A01G 1300

Patent

active

044957238

ABSTRACT:
A method of maintaining vegetation above frost damage levels in which the roots, stems, trunks or foliage of the vegetation is surrounded by a phase change material having a melting point in excess of the frost damage level, which phase change material is encased in a plurality of bags or in an elongated tubular member. In the case of use of an elongated tubular member, it may be coiled directly about the vegetation or coiled in stacks positioned above the vegetation or laid below ground in rows or coiled within the interior of an automotive tire proximate the vegetation which serves to directly collect solar energy. A fluid path is provided through the center of the tubular member which is coupled to a solar collector. The solar thermal energy collected thereby is transfered via fluid recirculating in this path to the phase change material such that the phase change material melts. When the ambient temperature falls below frost damage levels, the phase change material, upon cooling and solidifying, releases thermal energy to heat the vegetation. Alternatively, when sufficient solar energy is not available, the transfer fluid is heated by a fuel-fired furnace. In the case of use of encasement of the phase change material in a plurality of bags, these fill the toroidal interior of an automotive tire proximate the vegetation which directly collects solar thermal energy which is conducted to the encased phase change material.

REFERENCES:
patent: 4223666 (1980-09-01), Wasserman
patent: 4250958 (1981-02-01), Wasserman

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