Science Inventory

TRANSIENT AND STEADY STATE STUDY OF PURE AND MIXED REFRIGERANTS IN A RESIDENTIAL HEAT PUMP

Citation:

Judge, J. AND R. Radermacher. TRANSIENT AND STEADY STATE STUDY OF PURE AND MIXED REFRIGERANTS IN A RESIDENTIAL HEAT PUMP. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-96/129 (NTIS 97-117741), 1996.

Impact/Purpose:

information

Description:

The report gives results of an experimental and theoretical investigation of the transient and steady state performance of a residential air-conditioning/heat pump (AC/HP) operating with different refrigerants. (NOTE: The project was motivated by environmental concerns related to the replacement of stratospheric ozone depleting refrigerants as required by international agreement and U.S. law. Hydrochlorofluorocarbon (HCFC)-22, a medium pressure refrigerant, is scheduled to be phased out of production and must be replaced. Significant empirical data are available on HCFC-22, but relatively little data exist on the transient performance of any of the zeotropic mixtures being considered as HCFC-22 replacements.) The experimental work, conducted by testing an AC/HP in environmental chambers, documented refrigerant performance for steady state, cyclic, and seasonal performance, evaluated various equipment modifications, and measured changes in the concentrations of refrigerant mixtures as a function of time. A computer model was developed, capable of modeling the transient and steady state performance of an AC/HP. This model is the first capable of representing the significant transient and steady state physics of an AC/HP operating with pure and mixed refrigerants while utilizing minimal empirical data.

URLs/Downloads:

NTISCONTACT.PDF   (PDF,NA pp, 8 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (PUBLISHED REPORT/REPORT)
Product Published Date: 11/27/1996
Record Last Revised: 10/02/2008
OMB Category: Other
Record ID: 115205

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

AIR POLLUTION PREVENTION AND CONTROL DIVISION

ATMOSPHERIC PROTECTION BRANCH