Postharvest Questions & Answers by Topic
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Can you help me find the specific heat of kiwi fruit? |
Cold Storage, Kiwifruit |
January 2009 |
I have been trying to find the specific heat of kiwi fruit, can you help me with this information? (F.M.) |
Specific heat of foods is used to calculate the heat that must be removed during initial cooling. It can be estimated with Siebel's formula: cp= 0.00800*a + 0.200, where “a” is the percent water content of the food. This formula is for cooling only and does not account for the heat removed during freezing. I looked up water content of kiwifruit on the web and found a paper listing the water content of Hayward variety equal to 85%. Using this number in the formula, kiwifruit has a specific heat of 0.88 Btu/pound-°F. To get specific heat in SI units (kJ/kg-°C) multiply this number by 4.19. – Jim Thompson