The project team for a retail shopping space is calculating the baseline indoor

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试卷: LEED AP ID+C 模拟试卷C[查看]
The project team for a retail shopping space is calculating the baseline indoor water use. The project team has divided the employees and customers into two usage groups. There are 150 part time employees that each work 4 hours per day. 100 are women and 50 are men. Also, there will be an average estimated 800 retail shoppers daily and the center will be open every day of the year. What is the baseline water usage?
A: 968 gallons
B: 353,411 gallons
C: 222,650 gallons
D: 610 gallons

参考答案: C

本题解释:
Baseline water usage is calculated as part of Water Efficiency Prerequisite, Water Use Reduction. The problem also discusses retail customers.

Employees are part time so remember to calculate FTEs. The calculation is an annual rate. Since no genders are given for shoppers assume 1 to 1 ratio of men to women.

100 Part Time Women = 50 FTE (women)
50 Part Time Men = 25 FTE (men)
800 Retail shoppers = 400 men, 400 women

50 FTE Women * 1.6 gallons (water closet conventional flush rate)* 3 uses per day = 240 gallons/day
25 FTE Men * 1.6 gallons (water closet conventional flush rate) * 1 use per day = 40 gallons/day
25 FTE Men * 1.0 gallon (urinal conventional flush rate) * 2 uses per day = 50 gallons/day

Shoppers
400 women * 0.2 uses per day * 1.6 gallons per flush = 128 gallons/day
400 men * 0.1 uses per day * 1.6 gallons per flush = 64 gallons/day
400 men* 0.1 uses per day * 1.0 gallon per flush = 40 gallons/day

Sink Flow Rates
50 FTE Women + 25 FTE Men = 75 FTEs
[(75 FTEs * 3 uses/day * 15 seconds) / 60 seconds per minute] * 0.5 gallons per minute = 28 gallons/day

800 Shoppers
[800 * 0.2 * 15 seconds) / 60 seconds per minute] * 0.5 gallons per minute = 20 gallons/day

240+40+50+128+64+40+28+20= 610 gallons/day

The center is open every day of the year = 610 * 365 = 222,650