Method for the transfer of heat energy

Details Method for the transfer of heat energy Method for the transfer of heat energy

1986-06-24

1988-06-14

Davis, Jr., Albert W.

Heat exchange

Intermediate fluent heat exchange material receiving and...

Reversible chemical reaction

62497, F28D 2100

Patent

active

047505508

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION



TECHNICAL FIELD

This invention relates to a novel method for the efficient transfer of heat energy.


BACKGROUND ART

In district cooling or heating and central cooling or heating, the most important technique is to transfer heat energy from a heat generation place to widely scattered places of heat consumption. In the prior art, this transfer of heat energy has been carried out by using high-temperature water or steam as the medium. In either case, however, the dissipation loss of heat during its transport is substantial and, in an extreme case, as much as 50% of the effective heat energy is lost during its transport. This involves a serious problem in that the energy-saving nature of central cooling or heating is markedly impaired.
Moreover, since the heat-transfer medium such as high-temperature water or steam transported according to the prior art methods is directly utilized on the consumer side, heat storage functioning to maintain an adequate balance between heat generation and heat utilization cannot be achieved efficiently. Furthermore, especially where high-temperature water or low-pressure steam is used as the heat-transfer medium, a decrease in temperature of the heat-transfer medium provided for heat utilization as compared with its temperature at the heat generation place, i.e., the so-called degradation in the quality of energy, has been unavoidable.


DISCLOSURE OF THE INVENTION

It is an object of the present invention to provide a novel method for the transfer of heat energy which makes improvements over the above-described prior art methods for the transfer of heat energy and gives energy of high quality on the consumer side.
It is another object of the present invention to provide a method for the transfer of heat energy which, in particular, permits low-pressure steam to be transported efficiently and stored with little loss of heat.
It is still another object of the present invention to provide operating conditions under which this method for the transfer of heat energy can be carried out with very high thermal efficiency.
According to the present invention, there is provided a method for the transfer of heat energy which comprises the steps of produce the vapor of said heat-transfer medium; transport pipeline; absorption tank and allowing said heat-transfer medium vapor to be absorbed into an absorption fluid containing an absorbent, whereby the latent heat of said heat-transfer medium vapor and the heat of mixing generated by mixing of said heat-transfer medium and said absorption fluid are utilized to elevate the temperature of the resulting liquid mixture of said heat-transfer medium and said absorption fluid to a temperature higher than that of said heat-transfer medium vapor; its heat with the aid of a heat exchanger; and heat utilization into a liquid heat-transfer medium and an absorption fluid by means of a semipermeable membranous material having porosity, and recycling and reusing them as said heat-transfer medium and said absorption fluid, respectively.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow sheet illustrating one embodiment of the method for the transfer of heat energy in accordance with the present invention;
FIG. 2 is a graph showing the relationship between the ratio of the amount of absorption fluid recycled to the amount of low-pressure steam produced (W.sub.2 /W.sub.1) and the thermal efficiency; and
FIG. 3 is a graph illustrating the relationship between the weight fraction (x+z) of lithium bromide plus polyhydric alcohol in the absorption fluid and the degree of removal achieved at the separation section 7.


BEST MODE FOR CARRYING OUT THE INVENTION

The heat-transfer medium used in the present method for the transfer of heat energy can be any substance that has all of the following characteristics: be used. Among them, water is most preferred.
The heat generated at the heat generation place can be any type of heat, provided that it has a sufficiently high temperature to vaporize the aforesaid heat-transfer medium and thereby produce

REFERENCES:
patent: 2802344 (1957-08-01), Witherell

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