Question

Set up a table showing the individual load components and calculate the total load in Btu/hr-ft²

Consider an office building of 7,680 ft² floor area and 76,800 ft³ volume in Phoenix, AZ. The outdoor temperature is 110 ⁰F. The room is kept at 72⁰ F and the solar heat gain thru the window is 85,000 Btu/hr. The gross areas and the overall U values of each element are given below:

- wall: 3440 ft² and 0.30 Btu/hr-ft²- ⁰F

- window: 576 ft² and 0.60 Btu/hr-ft²- ⁰F

- door: 160 ft² and 0.64 Btu/hr-ft²- ⁰F

- roof: 7680 ft² and 0.15 Btu/hr-ft²- ⁰F F

- infiltration: 0.8 air changes per hour

Also the internal loads are specified as:

- lighting power density: 1.2 W/ft²

- Plug and equipment load density: 0.8 W/ft²

Answer 1