[ Home ] [ Up ]

International Journal of Environmentally Conscious Design & Manufacturing 

Volume 10, Number 2, 2001 - 2002

NOTE: In order to access the full-text version of the papers below, you need to be a current subscriber of the journal. To subscribe, please click HERE. If you already subscribed, click any link below and you will be taken to the full-text area

Contents
Contents

New and Energy Efficient Design for Home Refrigerator-Freezers, by M. Ghassemi, H. Tavana and A. Keshavarz, P. 1

    Over the years, refrigerator-freezers constitute the largest segment of home appliances
in Iran. Home refrigerator-freezers are the largest consumers of electricity among the
household appliances consume about 3.1% of the energy. Thus, the design and use of
home refrigerator-freezers has become increasingly important. Most modern
refrigerator-freezers have their condensing unit placed under the cabinet. In Iran,
almost all refrigerator-freezers condenser is placed vertically, on the back, outside of the
cabinet. This type of design not only occupies more space, but also could easily become
damaged when it contacts any sharp objects. Thus the purpose of this study was to
discuss the effects of placing the identical condenser inside the back panel of a 12 ft3,
single-door home refrigerator cabinet. The goal was to experimentally evaluate the
performance of the refrigerator unit with its identical condenser placed vertically, on the
back, inside the cabinet panel while no system modifications were considered. The study
showed that no dramatic changes in energy consumption occur when the identical
condenser is located on the back, inside the cabinet. In addition, this design is more
environmentally sound, less occupying.

Effects of Working Fluid Filling Ratio and Heat Flux on Correlations of Heat Transfer Coefficient in the Loop Thermosyphon, by Ki-Chang, Ki-Woo Lee, Young-Soo Lee, Seong-Yeon Yoo, P. 11

    Due to the relationship between momentum and energy transport, theoretical analysis of the
loop performance is very complicated; therefore it is necessary that these problems be solved
by experimental investigation before applying the loop thermosyphon to heat exchanger
design. The evaporator and condenser of the loop thermosyphon were made of carbon-steel,
and distilled water was used as working fluid in the experiments. Correlations of heat
transfer coefficients for evaporator and condenser sections were obtained from the
experimental data. For heat fluxes in the range of 13,000-78,000W/m2, the correlation
equations of heat transfer coefficients in evaporator and condenser predict the experimental
behavior to within ±5% and ±20% respectively.

1500 Watt Deployable Radiator with Loop Heat Pipe, by V. Perotto, S. Tavera, K. Goncharov, A. Orlov, A Golovin, P. 22

    Two-phase capillary loops are being extensively studied as heat collection and dissipation
systems for space applications as they appear to satisfy several requirements like low weight,
low volume, temperature control under variable heat loads and/or heat sink, operation on
ground and zero gravity, simple mounting and heat transfer through tortuous paths.
A deployable radiator with Loop Heat Pipe (LHP) with a heat transport capability of 1500
W has been defined and conceived by Alenia, and developed by Lavochkin Association
under Alenia contract.
In this paper a detailed description of the deployable radiator (and of its 1000 W LHP
precursor) is presented, with emphasis on the areas that required research activities to
improve performances. First test results are presented and discussed.