Energiagazdalkodasi Intezet

Geza Hivessy

Gyorgy Bergmann

Arpad Bakay

Mihaly Horvath

Tamas Homola

Peter Pecz

Istvan Szentgyorgyi

Heat exchanger apparatus which includes a substantially horizontal countercurrent heat exchanger of the shell-and-tube type, particularly for hybrid heat pumps operated with non-azeotropic work fluids. The apparatus further includes fluid distributor with fluid outlets the number of which corresponds to the number of the heat exchanger tubes of the heat exchanger is provided upstream the heat exchanger, the heat exchanger tubes of which are connected each to one fluid outlet of the fluid distributor.

Heat exchanger apparatus, particularly for hybrid heat pumps operated

A process for the operation of hybrid compression-absorption heat pumps or refrigerators with the use of fluid medium containing a mixture of differently volatile components (typically two) easily soluble in each other. During heat extraction, in a first counter current heat exchange, vapor of the more volatile component is partially dissolved in the liquid of the less volatile component. Simultaneously, an additional portion of the volatile component is condensed. Importantly, the medium is discharged from the first heat exchange in a stage of incomplete dissolution/condensation of the vapor phase. The combined medium is expanded and absorbs heat in a second counter current heat exchange phase, during which the more volatile component is both expelled from the solution and evaporated. A counter current heat exchanger is connected between the first and second heat exchangers, and uses low pressure medium exiting from the second heat exchange to effect cooling and thus further dissolution and condensation of the high pressure medium exiting from the first heat exchange.

Process and apparatus to improve the power factor of compressor-operated

A hybrid heat pump wherein the operating medium is a mixture of media which dissolve in each other and have different boiling points. The condensation and/or the evaporation is performed on more than one pressure levels and at variable temperatures. The compressor performs the suction on more than one pressure levels and performs the discharge on more than one pressure level. Between low pressure operating medium (p.sub.1, p.sub.2) and large pressure operating medium (p.sub.3, p.sub.4, p.sub.5) the heat transfer is performed by the internal heat exchangers.

Multi-stage heat pump of the compressor-type operating with a solution

The invention relates to a heat pump with compressor, in the thermodynamic system of which, solution is used. This way varying temperature conditions take place on the heat intake and heat discharge side. Provided that varying temperature system appears also on the demand side, adapting the heat pump of the invention accordingly, the specific cooling capacity may be several times that of the traditional cooling machines under identical temperature parameters. The 'wet compression' worked out in the invention, results in further increase of the specific cooling capacity, as well as it makes the competetiveness of the heat pump according to the invention indisputable in such field as for instance deep freezing.

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Budapest, Hungary

Geza Hivessy