Unsteady-state thermal analysis of a large space with vertical temperature distribution

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:33264

Arai, Yoshinobu; Togari, Satoshi; Miura, Katsuhiro ^[1]

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1. Kajima Corp., Tokyo (Japan). Kajima Technical Research Inst.

An unsteady-state analytical model is presented for evaluating the dynamic thermal environment of a large space with vertical temperature distribution. In this model, air currents along vertical walls generated by convective heat transfer are evaluated. The path of supply air jets and the volume of entrained air when the space is air conditioned are evaluated. A thermal network model is included to calculate transient wall temperatures. To verify the model, three experiments were conducted using a test room measuring 3 m by 3 m by 2.5 m: a natural convection experiment, an occupied-zone cooling experiment, and an ON-OFF controlled heating experiment. In all experiments, calculated values agreed well with measured values. The results of the thermal analysis indicate that in a large space with a vertical temperature difference, the influence of radiant heat transfer between wall surfaces is substantial The presented method was also found to be practical in terms of computation time.

• OSTI ID: 33264
• Report Number(s): CONF-9406105--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BUILDINGS
COMPUTERIZED SIMULATION
HEAT TRANSFER
ORIENTATION
TEMPERATURE DISTRIBUTION
TEMPERATURE GRADIENTS