1. Calculate a solar heating system's capacity factor (CF).Assumptions:– The design capacity is 10 MW per year– The actual use of panels is 3000 hours in a year2. Calculate the energy efficiencies of four types of bulbs in the figure below. Onlycalculate bulbs with 450 lumens. Lighting-ideas.netBulb TypeBrightBrightest450Lumens800Lumens1100LumensLeast EfficientRated LifeIncandescentEnergy used40W$4.82/yr60w$7.23/yr75w$9.03/yr1600 100wLumens$12.05/yr1 YearHalogenEnergy used29w$3.49/yr43w$5.18/yr53w$6.38/yr72w$8.67/yrCFLEnergy used11w$1.32/yr13w$1.57/yr20w$2.41/yr23w$2.77/yrMost EfficientLEDEnergy used9w$1.08/yr12w$1.44/yr17w$2.05/yr20w$2.41/yr15-20 Years1-3 Years6-10 YearsLighting accounts for 20-30% of electric billEstimated energy cost per year is based on 3 hours of use per day at 11 cents per kWhin an average single family home according to the Dept. of Energy

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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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1. Calculate a solar heating system's capacity factor (CF).
Assumptions:
– The design capacity is 10 MW per year
– The actual use of panels is 3000 hours in a year

2. Calculate the energy efficiencies of four types of bulbs in the figure below. Only
calculate bulbs with 450 lumens.

Lighting-ideas.net
Bulb Type
Bright
Brightest
450
Lumens
800
Lumens
1100
Lumens
Least Efficient
Rated Life
Incandescent
Energy used
40W
$4.82/yr
60w
$7.23/yr
75w
$9.03/yr
1600 100w
Lumens
$12.05/yr
1 Year
Halogen
Energy used
29w
$3.49/yr
43w
$5.18/yr
53w
$6.38/yr
72w
$8.67/yr
CFL
Energy used
11w
$1.32/yr
13w
$1.57/yr
20w
$2.41/yr
23w
$2.77/yr
Most Efficient
LED
Energy used
9w
$1.08/yr
12w
$1.44/yr
17w
$2.05/yr
20w
$2.41/yr
15-20 Years
1-3 Years
6-10 Years
Lighting accounts for 20-30% of electric bill
Estimated energy cost per year is based on 3 hours of use per day at 11 cents per kWh
in an average single family home according to the Dept. of Energy

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