Solar energy collecting system
AssigneeDirector-General of Agency of Industrial Science and Technology
InventorsYasuo Tanaka, Kenji Shimokawa, Muneshige Nagatomo
Life of this patent
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Abstract
In a solar energy collecting system which comprises a primary closed circuit including a solar energy collector, a heat exchanger, a carrier fluid receiver tank, and a circulating pump and a secondary closed circuit including a utilization means and engaged with the primary closed circuit through the heat exchanger, a heat carrier used in the primary closed circuit is a fluid capable of evaporating at low temperature under low pressure and the control of the primary closed circuit is performed according to a surface temperature of the solar energy collector, a temperature of the carrier emanating from the collector and/or a pressure of the carrier in the primary closed circuit.
Claims14
A solar energy collecting system utilizing latent heat transfer, comprising a primary closed circuit including, in series, a solar energy collector, a heat exchanger, a carrier receiver tank and a first circulating pump for circulating a heat carrier through said primary closed circuit, said carrier capable of evaporating at a low temperature under a low pressure, and a first control means responsive to surface temperatures of said solar energy collector, the temperature of said heat carrier emanating from said collector and a pressure in said heat exchanger and being operable to output a control signal to control the operation of said pump and the flow of fluid through a bypass circuit connected across said pump by opening and closing a control valve thereof to maintain the temperature of said carrier emanating from said collector at substantially a constant value, a secondary closed circuit including, in series, said heat exchanger, a utilization means, a second circulating pump for circulating water through said secondary circuit and a second control means responsive to the temperature of said water in said secondary circuit to maintain the temperature thereof at substantially a constant value.
Dependencies are inferred from the claim text.