Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1978-06-26
1980-11-11
Yeung, James C.
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
126443, 126450, 126422, 126448, F24J 302
Patent
active
042326559
ABSTRACT:
The invention is a solar energy conversion apparatus in which several evacuated, glass tubular collectors are connected together in a liquid circulation system for controlled movement of a liquid between the interior of the collectors and a storage tank. Liquid circulation is controlled by sensors and switches therefor in regulating operation of valves and/or a pump. The conditions for circulating the liquid rely upon (1) sensing a need for energy at the storage tank, (2) sensing solar radiation availability, (3) sensing thermal conditions in the solar collector tubes to avoid high temperature and thermal shock, and sensing a need to withdraw hot liquid and add more. The system is operable in either of two modes herein disclosed: (a) the "continuous batch circulation" mode in which liquid is pumped to fill the tubes, in parallel, and low temperature sensed below a set point to stop pumping and resume pumping when the temperature in the tubes arrives at the preselected higher temperature, and (b) the "full continuous circulation" mode in which liquid is continuously pumped through the tube collectors, in parallel, continuously withdrawing liquid from the top of the tube while introducing liquid at the bottom of the tube; in either mode, the hotter liquid being removed from the top of the tubes and relatively colder liquid introduced at the bottom of the tubes. The invention includes a full drainability of all the tubes of the system under control when conditions are sensed to call for draining the tubes; such as, the end of the solar day, the storage tank temperature exceeds a certain value (enough energy is stored), or tube temperature is too high; and, restarting of circulation of liquid to the tubes is abated until their temperature is within preselected operating range. The system will operate using water without additives without danger of freeze up and all collected energy is placed in storage at the end of a solar day period. The system includes a second circulation system through the storage tank to remove the heat in utilizing it, such as in a domestic hot water system. This second system removes water to be heated from the base of its hot water tank and pumps it through a heat exchanger in the solar heated liquid tank and back to the top of the hot water tank.
REFERENCES:
patent: 3799145 (1974-03-01), Butterfield
patent: 4027821 (1977-06-01), Hayes et al.
patent: 4029081 (1977-06-01), Strong
patent: 4044754 (1977-08-01), Cronin et al.
patent: 4060072 (1977-11-01), Johnson
patent: 4116219 (1978-09-01), Nurnberg
patent: 4119087 (1978-10-01), Cook
patent: 4120285 (1978-10-01), Nugent
patent: 4122830 (1978-10-01), Hapgood
patent: 4133338 (1979-01-01), Honikman
patent: 4138996 (1979-02-01), Cartland
"Solar Heating System Design Manual," ITT Training and Education Department, Fluid Handing Division 1976, pp. 4-9 to 4-15.
Frissora Joseph R.
Platt Michael H.
Click Myron E.
Nelson John R.
Owens--Illinois, Inc.
Wilson David H.
Yeung James C.
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