Ch5solutions

Ch5solutions - S-lC Water is not a fuel; thus the claim is...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
S-lC Water is not a fuel; thus the claim is f.:llse. 5-14C (a) No, (b) "'1tes. Accordin~to the second law, no heat engine can have and efficiency of 100%. 5-18 The rates of heat supply and Jheat rejection of a power plant are given. The power output and the thermal efficiency of this power pia t are to be determined. Assumptions 1 The plant op~rates steadily. 2 Heat losses from the working fluid at the pipes and other components are taken into consideration. Analysis (a) The total heat rejected ~y this power plant is Qt. = 145 + 8 = 153GJ/h ! Then the net power output of the plabt becomes 280 GJ/h . .. Wnel.oul =QH -QL =280-153=127GJ/h=3S.3MW (b) The thermal efficiency of the plant is determined from its definition. w = nel.OU'- 127GJ/h QH - 280GJ/h =1°,454 = 45.4% 'lth S-19E The power output and thermal efficiency of a car engine are given. The rate of fuel consumption is to be determined. Assumptions The car operates steadily.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Ch5solutions - S-lC Water is not a fuel; thus the claim is...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online