Human thermal comfort: seasonal change in optimum effective temperature Compare the optimum effective temperature for human comfort in winter versus summer. Choose the correct relation.
Mechanical Engineering
Heat Transfer, Refrigeration and Air Conditioning
Difficulty: Easy
Choose an option
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AHigher in winter than in summer
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BLower in winter than in summer
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CSame in winter and summer
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DIndependent of season
Answer
Correct Answer: Higher in winter than in summer
Explanation
Concept/ApproachThe effective temperature concept accounts for dry-bulb temperature, humidity, and air motion to reflect perceived comfort. Seasonal clothing and acclimatization shift the comfort zone.
ReasoningIn winter, lower air movement and heavier clothing lead to a slightly higher optimum effective temperature compared to summer, where higher air movement and lighter clothing make a lower effective temperature feel comfortable.
Final AnswerHigher in winter than in summer