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Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is
[2011]
- a)0.052
- b)0.525
- c)0.151
- d)0.202
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in ...
Ch = Cc = 0.1 × 4200 = 420 J/s
Cc (Tc1 – Tc2) = Ch (Th1 – Th2)
(70 – 20) = 90° Th2
Most Upvoted Answer
Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in ...
°C to 80°C. The specific heat capacity of water is 4.18 kJ/kg°C. How much heat energy is transferred to the water?
To calculate the heat energy transferred to the water, we can use the formula:
Q = m * c * ΔT
Where:
Q = heat energy transferred (in kJ)
m = mass of water (in kg)
c = specific heat capacity of water (in kJ/kg°C)
ΔT = change in temperature (in °C)
Given:
m = 0.1 kg/s
c = 4.18 kJ/kg°C
ΔT = 80°C - 20°C = 60°C
Substituting the given values into the formula, we get:
Q = 0.1 kg/s * 4.18 kJ/kg°C * 60°C
Q = 0.1 kg/s * 4.18 kJ/kg°C * 60°C
Q = 24.9 kJ/s
Therefore, the heat energy transferred to the water is 24.9 kJ/s.
To calculate the heat energy transferred to the water, we can use the formula:
Q = m * c * ΔT
Where:
Q = heat energy transferred (in kJ)
m = mass of water (in kg)
c = specific heat capacity of water (in kJ/kg°C)
ΔT = change in temperature (in °C)
Given:
m = 0.1 kg/s
c = 4.18 kJ/kg°C
ΔT = 80°C - 20°C = 60°C
Substituting the given values into the formula, we get:
Q = 0.1 kg/s * 4.18 kJ/kg°C * 60°C
Q = 0.1 kg/s * 4.18 kJ/kg°C * 60°C
Q = 24.9 kJ/s
Therefore, the heat energy transferred to the water is 24.9 kJ/s.
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Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer?
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Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer?.
Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer?.
Solutions for Cold water flowing at 0.1 kg/s is heated from 20°C to 70°C in a counter flow type heat exchanger by a hot water stream flowing at 0.1 kg/s and entering at 90°C. The specific heat of water is 4200 J/(kgK) and density is 1000 kg/m3. If the overall heat transfer coefficient U for the heat exchanger is 2000 W/(m2K), the required heat exchange area (in m2) is[2011]a)0.052b)0.525c)0.151d)0.202Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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