Building Environmental Systems - Assignment | ARE 346N, Assignments of Architecture

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On the psychrometric chart below, sketch and label the cooling/ dehumidification process for both an idealized and a real cooling coil. Why is coil bypass desirable (one reason)?

You are using R-12 as part of a specialized HVAC cascade cycle system that serves a morgue. The evaporator is at 0 °F and the condenser is at 40 °F. Assuming that the cycle is a theoretical single-stage cycle (i.e. no superheat in the evaporator) such as that depicted in Figure 3.3: i) What is the pressure in the evaporator? ii) What is the area of the superheat horn? iii) R-12 is no longer manufactured in the U.S. What are the concerns associated with its use? Be specific in your answer.