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The purpose of this study is designing a hybrid system which is a combination of radiant cooling and low temperature air conditioning integrated with ice storage system. Also this evaluates the performance of the system. We compared energy amount with annual operating costs of conventional air conditioning system and this radiant air conditioning system.

A method of numerical calculation for radiation heat transfer in a three-dimensional closed space including diffuse and specular surfaces was developed. To enable an analysis of the radiation heat exchange on each surface considering multiple specular reflections and obstacles to radiation in the space, an improved heat ray-tracing method was presented to calculate view factors accurately. The method was determined to be applicable to complicated problems in test calculations using models with specular surfaces and obstacles. Continuing efforts are being applied to more realistic problems. The example examined in this paper is an infrared emitter with a parabolic specular reflector, which is a conventional electric heating apparatus. The measured result for radiant power distribution agrees well with the calculated one. The practical validity of our method was verified.

In order to make more effective use of infrared radiation, we have developed a basic method for predicting the heating effect quantitatively.It allows one dimensional heat transfer analysis taking account of spectral properties. We can estimate the distribution and temporal variations of temperature inside the plastic plates to be heated. This method is applicable to heating systems without vaporization and enables us to predict what kind of emitter is most suitable to the platsic plate to be heated.

We discussed the simple method about a subjective evaluation of cooking odor diffusion from kitchen to a dining (or living) room. The subjects standardized their sensitivity by progressive amount of a standard material (2,4-decadienal) before each evaluating. And the subjects took a rest periodically during the evaluation, in order to exclude decreasing of sensitivity by olfactor y adaptation. These evaluating results accord with results of the thermal environment measurement and the visual observation by the smoke flow in the room. Prof., Faculty of Education, Niigata Univ., M. Home Ec. Graduate School, Nara Women's Univ. Kansai