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Title: Experimental investigation of an alternating evaporator duty refrigerator/freezer

Abstract

A bistable solenoid valve has been used to build an alternating evaporator duty (AED) domestic refrigerator/freezer. This refrigerator has two vapor compression refrigeration loops that share a common compressor, condenser, and suction line heat exchanger. Each of the refrigeration loops has an expansion device and evaporator. One evaporator is located in the fresh food compartment and the other is located in the freezer compartment. The bistable solenoid valve directs the flow of the refrigerant through one loop at a time. Only one of the two compartments is cooled at any given time. With this configuration, the food compartment is cooled at a higher evaporator temperature than the freezer. Due to this, the energy efficiency of the refrigerator is improved by 8.5% over a conventional domestic refrigerator/freezer. Also, this cycle allows for completely independent temperature control of the freezer and fresh food compartments. There may be a penalty because this cycle does not allow for both loops to be simultaneously optimized. Isobutane was the only refrigerant used in this investigation.

Authors:
; ;  [1]
  1. Univ. of Maryland, College Park, MD (United States)
Publication Date:
Sponsoring Org.:
Environmental Protection Agency, Washington, DC (United States); Maryland Univ., College Park, MD (United States)
OSTI Identifier:
687670
Report Number(s):
CONF-980650-
Journal ID: ISSN 0001-2505; TRN: IM9944%%335
Resource Type:
Book
Resource Relation:
Conference: 1998 ASHRAE summer annual meeting, Toronto (Canada), 20 Jun 1998; Other Information: PBD: 1998; Related Information: Is Part Of ASHRAE transactions 1998: Technical and symposium papers. Volume 104, Part 2; PB: 1511 p.
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; REFRIGERATORS; FREEZERS; VAPOR COMPRESSION REFRIGERATION CYCLE; EVAPORATORS; VALVES; DESIGN; ENERGY EFFICIENCY; REFRIGERANTS; EXPERIMENTAL DATA

Citation Formats

Lavanis, M., Haider, I., and Radermacher, R.. Experimental investigation of an alternating evaporator duty refrigerator/freezer. United States: N. p., 1998. Web.
Lavanis, M., Haider, I., & Radermacher, R.. Experimental investigation of an alternating evaporator duty refrigerator/freezer. United States.
Lavanis, M., Haider, I., and Radermacher, R.. Thu . "Experimental investigation of an alternating evaporator duty refrigerator/freezer". United States.
@article{osti_687670,
title = {Experimental investigation of an alternating evaporator duty refrigerator/freezer},
author = {Lavanis, M. and Haider, I. and Radermacher, R.},
abstractNote = {A bistable solenoid valve has been used to build an alternating evaporator duty (AED) domestic refrigerator/freezer. This refrigerator has two vapor compression refrigeration loops that share a common compressor, condenser, and suction line heat exchanger. Each of the refrigeration loops has an expansion device and evaporator. One evaporator is located in the fresh food compartment and the other is located in the freezer compartment. The bistable solenoid valve directs the flow of the refrigerant through one loop at a time. Only one of the two compartments is cooled at any given time. With this configuration, the food compartment is cooled at a higher evaporator temperature than the freezer. Due to this, the energy efficiency of the refrigerator is improved by 8.5% over a conventional domestic refrigerator/freezer. Also, this cycle allows for completely independent temperature control of the freezer and fresh food compartments. There may be a penalty because this cycle does not allow for both loops to be simultaneously optimized. Isobutane was the only refrigerant used in this investigation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 31 00:00:00 EST 1998},
month = {Thu Dec 31 00:00:00 EST 1998}
}

Book:
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