Monolithically Integrated Bi-Directional Heat Pump

a heat pump and monolithic technology, applied in the field of heat pumps, can solve the problems of significantly reducing the maximum power of the heat pump, limiting the performance of most heat pumps, and limiting the performance of some emergent heat pump technologies

Inactive Publication Date: 2014-06-12
UNIV OF TEXAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resistance to mass transfer fundamentally limits the performance of most heat pumps that rely on chemical driving forces for passive operation.
In the case of adsorption or absorption chillers, for example, a vapor passage constriction between the evaporator and adsorber or adsorber can significantly reduce the maximum power of the heat pump.
As shown in FIGS. 1A and B, the mass transfer impedance severely limits the performance of some emergent heat-pump technologies, such as thermo-adsorptive batteries for electric vehicle climate control that could otherwise enable significant enhancement in electric vehicle driving range [1].
Mass transfer impedance limits the performance of some heat pump systems that use working fluids at low pressure, because of the high volumetric flow rates involved.
While the mass transfer improves if advective transport is also considered, this improvement conies at fee cost of a pressure drop that reduces the useful temperature range of the heat pump.

Method used

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Embodiment Construction

[0046]An embodiment of the invention is shown in FIGS. 2(A) and (B). FIG. 2(A) shows the integrated design in a T-shape particularly adapted for battery electric vehicle integration. The integrated design 10 includes a combined evaporator-condenser unit 12 along with adsorbent-covered fins 14. In the explored view of FIG. 2(B), showing the adsorbent material mounted on liquid-cooled fin tubes, arrow 1 indicates the flow of heat transfer fluid to the evaporator-condesner 12. The arrow 2 indicated the flow of liquid refrigerant into the evaporator-condesner unit during battery discharge. Arrow 3 indicates the flow of heat transfer fluid to the adsorbent fins. The pressure vessel containing these elements is not, itself, shown for the sake of clarity.

[0047]The monolithically-integrated design disclosed herein combines three separate subsystems from traditional adsorption heat pumps—the evaporator, condenser, and adsorbent bed, into a single pressure vessel. This consolidation increases...

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Abstract

Monolithically integrated heat pump. The heat pump includes as adsorbent / absorbent condenser forming a hot terminal integrated with a phase change heat exchanger forming a cold terminal. The adsorbent / absorbent condenser and the phase change heat exchanger are integrated into a single pressure vessel.

Description

[0001]This application claims priority to provisional application Ser. No. 61 / 733941, filed on Dec. 6, 2012, the contents of which are incorporated herein by reference.[0002]This invention was made with government support under grant no. DE-AR0000185, awarded by the Department of Energy. The government has certain rights in the invention.BACKGROUND OF THE INVENTION[0003]This invention relates to heat pumps and more particularly to a monolithically integrated bi-directional heat pump that integrates evaporator, condenser and adsorption bed into a single compact pressure vessel.[0004]Resistance to mass transfer fundamentally limits the performance of most heat pumps that rely on chemical driving forces for passive operation. In the case of adsorption or absorption chillers, for example, a vapor passage constriction between the evaporator and adsorber or adsorber can significantly reduce the maximum power of the heat pump. As shown in FIGS. 1A and B, the mass transfer impedance severel...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B30/04
CPCF25B30/04F25B17/00F25B17/08F25B35/04F25B37/00F25B39/00Y02B30/62Y02A30/27Y02B30/00
Inventor MCKAY, IAN SALMONMIERS, COLLIERNARAYANAN, SHANKARWANG, EVELYN N.HIDROVO CHAVEZ, CARLOS HILLERWEHMEYER, GEOFFREY
Owner UNIV OF TEXAS
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