Lub zog hluav taws xob thiab kub hloov dua siab tshiab? Ua ntej tshaj tawm cov kab thiab cov cim ntawm lub zog thiab cua sov.
(1) Watt yog lub zog ua haujlwm, cim: W,
Kilowatt yog chav ua zog, cim: KW,
1 kW = 1000 watts
(2) Joule yog chav ua cua sov, cim: J
KJ yog chav ntsuas cua sov, cim: KJ
1 kJ = 1000 joules
1 kW · teev = 860.04 daim npav loj 1 daim npav loj ≈ 4186 joules
Piv txwv li: 2KW lub zog sov npaum li cas?
Tshav Kub = 2 * 86.04 * 4186 = 7200254.88 joules
Piv txwv: nrum txhuas cua sov phaj, specifications: 300 * 320 * 20mm, yuav tsum kub txog 400 ° C, lub hwj huam suav:
Ua ntej pom thaj chaw thaj tsam: 30 * 32 * 2 + 30 * 2 * 2 + 32 * 2 * 2 = 1920 + 120 + 128 = 2168cm2,
Qhov thib ob, qhov kub saum npoo av yuav tsum yog 400 ° C, thiab qhov kev thauj khoom saum npoo yog xaiv tau 1.8 W / cm 2.
Thaum kawg lub zog muab xam 2168 * 1.8 = 3902.4W