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A window air conditioner requires approximately 1.5 × 10 3 W of power. How many square meters of PV cells would it require to provide this power? Assume that solar power is 1.0 × 10 3 W/m 2 and that the cells are 15% efficient in converting sunlight to electrical energy. Could you think of some good reasons to use solar power for air-conditioning units?

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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 10, Problem 34E
Textbook Problem
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A window air conditioner requires approximately 1.5 × 10 3 W of power. How many square meters of PV cells would it require to provide this power? Assume that solar power is 1.0 × 10 3  W/m 2 and that the cells are 15% efficient in converting sunlight to electrical energy. Could you think of some good reasons to use solar power for air-conditioning units?

Interpretation Introduction

Interpretation:

The area of the PV cells required to run the air conditioner is to be determined and some good reasons to use solar power for air conditioning units are to be stated.

Concept Introduction:

Power input on the PV cell is the total active area of the PV cell multiplied by the solar power. The percent of the input power that is converted to output power by a PV cell is called its efficiency. Percent efficiency of a PV cell is 100 multiplied by the ratio of power out and power in.

Percent efficiency=Power outPower in×100 …… (1)

Average solar power=Power inputSurface area

Explanation of Solution

Given information:

The power output required is 1500 W.

Solar power is 1.0 ×103W/m2.

Efficiency of the cells is 15 %.

The area of the PV cells is considered A m2.

Power input on the PV cell is calculated as:

(A m2×1000 Wm2)=1000A W

Therefore, the area required to provide the given amount of power is

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Chapter 10 Solutions

Chemistry In Focus
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