關於熱傳導係數的單位換算

Question

0.5　cal / cm‧s‧oC 換算成 ?W/m-K
0.37　cal / cm‧s‧oC 換算成 ?W/m-K
0.29　cal / cm‧s‧oC 換算成 ?W/m-K

Answer 1

1 (cal) = 4.186(j)， 1 (cal/s) = 4.186( j / s) = 4.186 (W)。
雖然℃ = K-273 ，但是 1 ℃ = 1 K。(攝氏改變一度時，絕對溫度也改變一度)
1 (cal / cm.s.℃) = 4.186 (w/cm.K) = 4.186 (w/cm.K)*(100cm/1m) = 418.6 (w/m.k)
(1) 0.5 (cal / cm.s.℃) = 0.5*418.6 (w/m.k) = 209.3 (w/m.k)
(2) 0.37 (cal / cm.s.℃) = 0.37*418.6 (w/m.k) = 154.882 (w/m.k)
(3)0.29 (cal / cm.s.℃) = 0.29*418.6 (w/m.k) = 121.394 (w/m.k)