Railways Technical Ability Refrigeration and Air-Conditioning Question Bank Refrigeration and Air-Conditioning

  • question_answer A water chiller with a capacity of 30 tons of refrigeration cools \[20\,{{m}^{3}}/hr\] of water entering at \[12{}^\circ C.\] what is the temperature of water leaving the chiller?

    A) \[5{}^\circ C\]                          

    B) \[6{}^\circ C\]

    C) \[7{}^\circ C\]                          

    D) \[7.5{}^\circ C\]

    Correct Answer: D

    Solution :

    \[Q=30\times 3.5167=105.5\,\,kW\]  \[{{m}_{w}}\times {{c}_{p}}\,({{t}_{i}}-{{t}_{v}})=Q\] \[\frac{20\times 1000}{3600}\times 4.187\,(12-{{t}_{0}})=105.5\] \[{{t}_{0}}=12-45=7.5{}^\circ C\]

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