शीतलन कुण्डल का उपमार्ग गुणक 0.2 है। यदि सतह का तापमान 5°C है और हवा 40°C पर प्रवेश करती है, तो हवा का निकास तापमान _______ होगा।

This question was previously asked in
ISRO IPRC Technical Assistant Mechanical 21 April 2016 Official Paper
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  1. 5°C
  2. 12°C
  3. 20°C
  4. 40°C

Answer (Detailed Solution Below)

Option 2 : 12°C
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अवधारणा:

उपमार्ग गुणक कुल प्रवेशिका हवा के आंशिक भाग का प्रतिनिधित्व करता है जो कुण्डल के संपर्क में नहीं है।

शीतलन कुण्डल का उपमार्ग फैक्टर निम्न द्वारा दिया जाता है:

\(BPF = \frac{{{T_{outlet}} - {T_{coil}}}}{{{T_{inlet}} - {T_{coil}}}}\)

गणना:

दिया हुआ है कि:

BPF = 0.2, Tप्रवेशिका = 40°C, और Tकुण्डल = 5°C

\(0.2~=~\frac{T_{outlet}\ -\ 5}{40\ -\ 5}\)

Tनिर्गम = 12°C

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