We have a room with 18 luminaires. These luminaires will be cleaned once per year at a total cost of $10 per luminaire for labor and consumables (rags, cleaning solution, scissors lift, etc. Every six years the luminaires will be re-lamped at a total cost of $60 per luminaire for lamps and other costs (labor, equipment, new lamps, etc) What is the annual cost of cleaning and re- lamping? Table 1: Coefficient of Utilization - All floor reflectances = 20% RCC- RCC- RCC- RCC- RCC- RCC- RCC- RCC - RCR 80%, RW 80%, RW 80%, RW 70%, RW 70%, RW 70%, RW 50%, RW 50%, RW - 70% -50% -30% - 70% -50% -30% -50% -30% 0.97 .97 .97 .94 .94 .94 .90 .90 1.89 .86 .82 .87 .84 .81 .80 .78 2.82 .76 .71 .80 .74 .70 .71 .68 3.75 .67 .61 .73 .66 .61 .64 .59 4.69 .60 .54 .68 .59 .53 .57 .52 5.64 .54 .47 .62 .53 .47 .52 .46 6.59 .49 .42 .58 .48 .42 .47 .41 7.55 .45 .38 .54 .44 .38 .43 .37 8.51 .41 .34 .50 .40 .34 .39 .34 9.48 .38 .31 .47 .37 .31 .36 .31 10.45 .35 .29 .44 .34 .28 .34 .28

We have a room with 18 luminaires. These luminaires will be cleaned once per year at a total cost of $10 per luminaire for labor and consumables (rags, cleaning solution, scissors lift, etc. Every six years the luminaires will be re-lamped at a total cost of $60 per luminaire for lamps and other costs (labor, equipment, new lamps, etc) What is the annual cost of cleaning and re- lamping? Table 1: Coefficient of Utilization - All floor reflectances = 20% RCC- RCC- RCC- RCC- RCC- RCC- RCC- RCC - RCR 80%, RW 80%, RW 80%, RW 70%, RW 70%, RW 70%, RW 50%, RW 50%, RW - 70% -50% -30% - 70% -50% -30% -50% -30% 0.97 .97 .97 .94 .94 .94 .90 .90 1.89 .86 .82 .87 .84 .81 .80 .78 2.82 .76 .71 .80 .74 .70 .71 .68 3.75 .67 .61 .73 .66 .61 .64 .59 4.69 .60 .54 .68 .59 .53 .57 .52 5.64 .54 .47 .62 .53 .47 .52 .46 6.59 .49 .42 .58 .48 .42 .47 .41 7.55 .45 .38 .54 .44 .38 .43 .37 8.51 .41 .34 .50 .40 .34 .39 .34 9.48 .38 .31 .47 .37 .31 .36 .31 10.45 .35 .29 .44 .34 .28 .34 .28

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter2: Basic Electricity

Section: Chapter Questions

Problem 30RQ: True or False: Ohms law applies to all types of electrical circuits.

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