Thermodynamics: An Engineering Approach 8th Edition

Published by McGraw-Hill Education
ISBN 10: 0-07339-817-9
ISBN 13: 978-0-07339-817-4

Chapter 2 - Energy, Energy Transfer, and General Energy Analysis - Problems - Page 108: 2-134

Answer

b) $9021 dollars$

Work Step by Step

The energy consumed by the compressor is: $E_{c}=\frac{75hp*\frac{0.7457kW}{1hp}*2500\frac{h}{year}}{0.93}=150342.74\frac{kWh}{year}$ Then the annual electricity cost is: $Cost=150342.74\frac{kWh}{year}*0.06\frac{dollars}{kWh}=9020.56\frac{dollars}{year}$
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