| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Research Abstract |
In this study, we conducted an experimental study on heat transfer and pressure drop in a small-diameter tube with an outside diameter of 4.00 mm using R32 (which is one of the new-generation candidates for alternative low-GWP refrigerants) and R 410A (which is currently used in household air-conditioning systems). Furthermore we conducted thesame experimental study using pure R152a and R32+R152a refrigerant mixtures, and it was made clear that pressure drop and heat transfer characteristics. Also we proposed that the empirical correlation of heat transfer coefficient and pressure drop for equipment design can be applied for heat exchangers using the next generation refrigerants.
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