DOE/ORNL heat pump design model, overview and application to R-22 alternatives

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Description

This computer program is a public-domain system design tool for application to air-to-air heat pumps. The main aspects of the program are reviewed with emphasis on the newest features of the current fifth-generation version (Mark V) and an upcoming more fully HFC-capable release (Mark VI). Current model predictions are compared to test data for a leading HFC alternative to HCFC-22 in heat pumps. Examples are shown of some user interfaces that have been recently developed for the program. To demonstrate the design capabilities of the model for R-22 alternatives, a refrigerant-side optimization was conducted to find the best balance of ... continued below

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14 p.

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Rice, C. K. December 1997.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 28 times , with 5 in the last month . More information about this article can be viewed below.

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Description

This computer program is a public-domain system design tool for application to air-to-air heat pumps. The main aspects of the program are reviewed with emphasis on the newest features of the current fifth-generation version (Mark V) and an upcoming more fully HFC-capable release (Mark VI). Current model predictions are compared to test data for a leading HFC alternative to HCFC-22 in heat pumps. Examples are shown of some user interfaces that have been recently developed for the program. To demonstrate the design capabilities of the model for R-22 alternatives, a refrigerant-side optimization was conducted to find the best balance of heat transfer versus pressure drop for HCFC R-22, HFCs R-134a and R-410A, and the natural refrigerant propane. COP was maximized while refrigerant charge and tube size were minimized. Independent design parameters were fraction of total area in the outdoor coil, tube diameter and number of circuits for each heat exchanger, and condenser subcooling. Heat exchanger design tradeoffs are discussed for a heat pump relative to air conditioners and heating-only units. A design optimized for heating-only operation is presented.

Physical Description

14 p.

Notes

OSTI as DE98000799

Source

  • 3. international conference on heat pumps in cold climates, Wolfville (Canada), 11-12 Aug 1997

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  • Other: DE98000799
  • Report No.: ORNL/CP--95170
  • Report No.: CONF-9708120--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 554764
  • Archival Resource Key: ark:/67531/metadc696834

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Oct. 3, 2017, 6:41 p.m.

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Rice, C. K. DOE/ORNL heat pump design model, overview and application to R-22 alternatives, article, December 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc696834/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.