Refrigeration – Refrigeration producer – Sorbent type
Reexamination Certificate
2000-06-19
2001-07-31
Doerrler, William (Department: 3744)
Refrigeration
Refrigeration producer
Sorbent type
C062S335000, C062S310000, C062S314000, C062S306000, C062S271000
Reexamination Certificate
active
06266975
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a heat pump/engine system and method, in particular to a heat pump/engine system and method for the air-conditioning of enclosed spaces.
BACKGROUND OF THE INVENTION
Conventional air-conditioners are effective in removing Sensible Heat (SH) and less effective in removing Latent Heat (LH). To remove heat, the evaporator of the air-conditioner must be cold compared with the ambient air which is normally about 26° C. Yet to remove vapor, the evaporator should be cold compared with the dew point temperature, which is about 15° C.
It can be shown that when the LH exceeds the SH, the humidity in a conventionally conditioned enclosed space exceeds 60%, which humidity is the maximum humidity recommended for maintaining a comfortable environment. For this reason, in humid climate air-conditioning systems require an absorption machine which, while removing humidity, heats the enclosed space, and thus, reduces the efficiency of the conditioning system.
In PCT Application Publication No. WO96/33378, there is disclosed a heat pump system and method for air-conditioning utilizing a refrigerant evaporation and a refrigerant condenser for exchanging heat with brine solution. The refrigerant is considered to have an adverse effect on the ozone, and thus, it is recommended to avoid the use thereof.
SUMMARY OF THE INVENTION
Hence, it is a general object of the present invention to provide an environmental friendly heat pump/engine system and method utilizing a water/brine flash evaporator and air/brine heat exchangers.
It is a further object of the present invention to provide a heat pump/engine system and a method for air-conditioning an enclosed space by controlling the heat load in the enclosed space, by regulating the water/brine concentration of a flash evaporator.
It is still a further object of the present invention to provide a heat pump/engine method and a system for air-conditioning an enclosed space by controlling the temperature of the water and or the brine of said flash evaporator.
According to the present invention there is therefore provided a heat pump/engine system, comprising a water/brine flash evaporator in fluid communication with a first air/brine heat exchanger, a brine condenser in fluid communication with a second air/brine heat exchanger, and a vapor compressor/turbine connected on a fluid conduit leading from said flash evaporator to said brine condenser.
The invention further provides a heat pump/engine method, comprising a flash water/brine evaporator in fluid communication with a first air/brine heat exchanger, a brine condenser in fluid communication with a second air/brine heat exchanger, and a vapor compressor/turbine connected on a fluid conduit leading from said flash evaporator to said brine condenser, and regulating the heat load in an enclosed space by controlling the water flow in said flash evaporator in accordance with humidity and heat load in said space.
The invention will now be described in connection with certain preferred embodiments with reference to the following illustrative figures, so that it may be more fully understood.
With specific reference now to the figures in detail, it is stressed that the particulars shown are by way of example and for the purposes of illustrative discussion of the preferred embodiments of the present invention only and are presented in the cause of providing what is s believed to be the most useful and readily understood description of the principles and conceptual aspects of the invention. In this regard, no attempt is made to shown structural details of the invention in more detail that is necessary for a fundamental understanding of the invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice.
REFERENCES:
patent: 2672024 (1954-03-01), McGrath
patent: 3018231 (1962-01-01), Valentine et al.
patent: 3415502 (1968-12-01), Munters
patent: 4212714 (1980-07-01), Coker et al.
patent: 5729993 (1998-03-01), Boiarski et al.
patent: 6122930 (2000-09-01), Nishiguchi et al.
patent: 6148634 (2000-11-01), Sherwood
Agam Energy Systems Ltd.
Bachman & LaPointe P.C.
Doerrler William
Shulman Mark S.
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