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Title: Cold energy release characteristics of an ice/air direct contact heat exchanger

This paper deals with the cold energy release characteristics of an ice/air direct contact heat exchanger in a refined cold energy conveyance system. Characteristics of the outlet temperature, the humidity, and time history of released heat are examined when the initial height of the ice-cube-packed bed in the heat exchanger is changed. The following are the results obtained in these experiments: (1) Inlet air of 30 C is lowered to about 0 C by passing the air through the heat exchanger, and absolute humidity of the outlet air is reduced to about a quarter of that of the inlet air. (2) There is an optimum height of the ice-cube-packed bed for maximizing the amount of cold energy released. (3) This heat exchange method can supply about twice the amount of cold energy released by an ordinary fin-tube-type heat exchanger even if the air velocity in the heat exchanger is reduced to about 0.38 times that of the fin-tube-type heat exchanger.
Authors:
;  [1] ; ; ;  [2]
  1. Hitachi Ltd., Ibaraki (Japan)
  2. Tokyo Electric Power Co., Yokohama (Japan)
Publication Date:
OSTI Identifier:
687603
Report Number(s):
CONF-980650--
Journal ID: ISSN 0001-2505; TRN: IM9944%%268
Resource Type:
Conference
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.
Publisher:
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA (United States)
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 25 ENERGY STORAGE; AIR CONDITIONING; LATENT HEAT STORAGE; ICE; ENERGY CONSUMPTION; BUILDINGS; DIRECT CONTACT HEAT EXCHANGERS; PACKED BEDS; PNEUMATIC TRANSPORT; HEAT TRANSFER