Question 11 from the 10-year case study
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An inorganic chemical plant is developing a new product by using steam jet refrigeration technology. The cooling capacity of the refrigeration unit is 1,800,000 kj/h, and the chilled water temperature drops from 14°C to 4°C in the evaporator. Which of the following values represents the amount of evaporation in the evaporator (in kg)? Temperature, Enthalpy of liquid water in kJ/kg, Enthalpy of water vapor in kJ/kg: 4 – 16.832; 2508.432. 14 – 58.785; 2526.855. (A) 772, (B) 589, (C) 620, (D) 90. Dear friends, I have looked into steam jet refrigeration technology; the cooling capacity refers to the energy absorbed per unit time during the evaporation of water. Why is the enthalpy change associated with evaporation based on 4°C as a reference point?
I’m asking experts for help; I still don’t understand this problem
Original poster, why do I get 722 as my answer? What is the correct answer?