Question 12 (2 points) A well-mixed, insulated water storage tank is to be maintained at internal temperature 60°C. The

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Question 12 2 Points A Well Mixed Insulated Water Storage Tank Is To Be Maintained At Internal Temperature 60 C The 1 (60.36 KiB) Viewed 50 times

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Question 12 (2 points) A well-mixed, insulated water storage tank is to be maintained at internal temperature 60°C. The environmental temperature around the tank varies from -25°C to 30°C. The tank's exterior surfaces (total = 125 m²) have four different levels of insulation as indicated in the table. Surface Effective RSI, Area, m² m². C/W Surface A 60.0 Surface B 30.0 Surface C 30.0 Surface D 5.0 1.0 Say that just one surface can be selected to have its insulation upgraded such that its effective RSI would be doubled. Which should be selected to achieve the greatest reduction in heat loss? Component 10.0 15.0 4.0
Surface A Surface B O Surface C O Surface D
Question 11 (3 points) A rooftop unit provides heating, cooling, and ventilation to a single HVAC zone. The supply fan provides air circulation rate of 1200 L/s. OA-> EA- T ню RTU CC HC conditioned space Ts heat gain Consider a period when the space temperature is 24°C, the net heat gain to the space is 15 kW, and the RTU operates to deliver average supply air temperature (Ts) to keep the room temperature steady. Based on a sensible fluid heating/cooling approximation (
Based on a sensible fluid heating/cooling approximation ( pcp = 1.23 J/L. ˚C), the average supply air temperature delivered by the RTU will be closest to which of the following values? O 8°C O 11°C 14°C O 17°C O 20°C 23°C