Question
Download Solution PDF24 सेमी जाडी असलेल्या विटांच्या भिंतीच्या आतील पृष्ठभागाचे तापमान 25°C आणि बाह्य पृष्ठभागाचे तापमान 5°C आहे. तर भिंतीच्या प्रति चौरस मीटरमधून उष्णता कमी होण्याचा दर (औष्णिक वाहकता = 0.15 ज्यूल/ (s⋅m⋅k)) आहे:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFयोग्य उत्तर 12.5 J/s आहे.
संकल्पना:
- फूरियरच्या नियमानुसार, एकसंध घनतेतून उष्णतेच्या प्रवाहाचा दर Q, हे क्षेत्र A च्या थेट प्रमाणात असते, उष्णतेच्या प्रवाहाच्या दिशेने विभागाच्या काटकोनातील आणि उष्णतेच्या मार्गावरील तापमानातील फरक dT आहे.
Q = - KA dT/dX
दिले आहे:
- उष्णता कमी होण्याचा दर = K = 0.15
- तापमान फरक = dT = 25 - 5 = 20°C
- dX = 24 सेमी = 0.24 मी
- क्षेत्रफळ (प्रति मीटर चौरस विचारले आहे) = 1 मी2
स्पष्टीकरण:-
- Q = - KA dT/dX
- = 0.15 x 1 x 20 / 0.24
- = 12.5 ज्यूल/सेकंद
Last updated on Jun 26, 2025
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