Individual Assignment Provide a simple payback period of installing a heat wheel system in an 80,000-cfm constant Volume

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Individual Assignment Provide A Simple Payback Period Of Installing A Heat Wheel System In An 80 000 Cfm Constant Volume 1 (80.13 KiB) Viewed 30 times

Individual Assignment Provide a simple payback period of installing a heat wheel system in an 80,000-cfm constant Volume AHU. During the winter, air is exhausted at 72 °F, and during the summer at 76 °F. The heat recovery system operates during both heating and cooling seasons with 78 percent efficiency. The boiler is 75 percent efficient and uses natural gas above 50 °F ambient and diesel below 50 °F ambient. The chiller uses 0.8 kW/ton. Assume that the energy costs are $0.10/kWh, $0.90/gal (diesel), and $1.50/CCF (gas). The heat recovery system costs $1.50 per cfm and increases the static pressure in both supply and exhaust ducts by 0.75 in WG. Assume that the fan static efficiency is 75 percent. To Move the wheel, a 1.5 hp motor is required. To solve this problem, use the bin calculation for the Denver climate.