L11-liquefaction2 - LECTURE # 11 Topic: Liquefaction...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Liquification 1 8/19/2005 LECTURE # 11 Topic: Liquefaction
Background image of page 1

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

View Full DocumentRight Arrow Icon
Liquification 2 8/19/2005 “Four things that can be done to a gas” according to Willie Gully Figure adapted from Cryogenic Engineering by Thomas M. Flynn, Dekker:NY (1997), p. 274
Background image of page 2
Liquification 3 8/19/2005 s The simplest liquefaction process is the Linde or Joule-Thompson expansion cycle s Some of the steps in the process are b Gas is compressed at ambient pressure b Cooled in a heat exchanger b Passed through a throttle valve - isenthalpic Joule- Thompson expansion – producing some liquid b Liquid is removed and the cool gas is returned to the compressor via the heat exchanger of step #2 Liquefaction Process
Background image of page 3

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

View Full DocumentRight Arrow Icon
Liquification 4 8/19/2005 Liquefier block diagram Linde or Joule-Thomson (J-T) Cycle r Adapted from Helium Cryogenics, Van Sciver, Plenum (1986) p. 289 Isobaric cooling Non-liquefied return gas Simplest form of cycle Hydrogen requires pre-cooling J-T expansion valve Make-up gas Liquid out
Background image of page 4
Liquification 5 8/19/2005 Room Temp. isothermal compression ideal W=T S T e m p r a t u Entropy real compression Isobaric heating in counter- flow heat exchanger Isobaric cooling in counter- flow heat exchanger Ideal isenthalpic expansion Real isenthalpic expansion Unliquefied gas returning to compressor Fraction of gas liquefied } Linde cycle Temperature/Entropy diagram
Background image of page 5

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

View Full DocumentRight Arrow Icon
Liquification 6 8/19/2005 s The Linde cycle works for gases, such as nitrogen, that cool upon expansion at room temperature. s
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 16

L11-liquefaction2 - LECTURE # 11 Topic: Liquefaction...

This preview shows document pages 1 - 7. Sign up to view the full document.

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