A fruit juice is being heated in an indirect heat exchanger using steam as a heating medium. The product flows through the heat exchanger at a rate of 1000 kg/h and the inlet temperature is 30 oC. Determine the quantity of steam required to heat the product to 100 oC when only latent heat of vaporization (2230.2 kJ/kg) from steam at 110oC is used for heating. The specific heat of the product is 4 kJ/(kg oC).

The appropriate response will be "125.55 kg/hr".

Explanation:

The given values are:

Rate of heat exchanger,

m = 1000 kg/h

Inlet temperature,

T = 30°C

Specific heat,

= 4 kJ/(kg°C)

Now,

The heat taken by juice from steam will be:

⇒

On substituting the values, we get

⇒    

⇒    

The heat given by the steam to juice will be:

⇒

On substituting the values, we get

⇒    

On equating both the heat values, we get

⇒

⇒        

⇒        

explanation:

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