Refrigeration – Diverse systems – e.g. – ice and mechanical – Primary and secondary dependent circuits
Patent
1991-05-09
1994-08-02
Davis, Jr., Albert W.
Refrigeration
Diverse systems, e.g., ice and mechanical
Primary and secondary dependent circuits
62 90, 62 95, 62119, 62173, 16510414, 165140, F25J 100, F28D 1502, F25B 504
Patent
active
053334701
ABSTRACT:
An air conditioning system uses heat-pipes in combination with a cooling coil to increase either the dehumidification capacity or the efficiency and capacity of an air-conditioning system. In the dehumidification mode, the secondary cooling coil is inactive, and the heat pipes operate as a heat exchanger between the warm return air and the cold supply air of the air conditioning system to precool the return air and reheat the supply air, increasing the latent capacity of the main cooling coil. In the efficiency and capacity boosting mode, the secondary cooling coil is activated by introducing a portion of the cooling fluid from the air-conditioning system. This results in a neutralization of the effect of the heat pipes as well as an increase in effective heat-exchange area between the cooling fluid and the air, therefore produces an increase in the capacity of the system. In the case of a direct expansion system, the evaporation temperature and pressure of the air-conditioning system are increased by the augmentation of the heat-exchange capacity of the evaporators, resulting in improved thermodynamic efficiencies as well as cooling output capacity. This ability to control the air-conditioning system for maximum dehumidification or maximum cooling efficiency and capacity allows a closer match with the variable load demands for a minimum energy requirement.
REFERENCES:
patent: 2093725 (1937-09-01), Hull
patent: 2691488 (1954-10-01), Ghai
patent: 4333520 (1982-06-01), Yanadori et al.
patent: 4607498 (1986-08-01), Dinh
Davis Jr. Albert W.
Heat Pipe Technology, Inc.
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