Difference between.Adiabatic cooling and joule.Thomson cooling
Answers
Answer:
Adiabatic cooling happens as air mass expands with increasing elevation (because density of gases decreases farther into the atmosphere). As elevation increases, the air gets cooler because energy is drawn from the surroundings. Less dense air traps less heat resulting in this net cooling called adiabatic cooling. It occurs at an average of 6 degrees Celsius per 1000 meters, but it can vary.
Adiabatic cooling is the basis of most modern cooling devices. It is mechanically exploited by taking a volume of gas and compressing it within a radiator, essentially adiabatically heating the gas. The heated gas will then radiate away, and as the gas passes through to the other side of the radiator it is allowed to expand. Now an amount of the heat energy has been conducted away through the radiator, the expanded gas will be cooler. This mechanism is used in all modern refrigerators and air conditioners.
Thomson cooling is the adiabatic cooling or heating that accompanies the expansion of a real gas. During CO2 injection into a natural gas reservoir, the pressure near the injection well declines rapidly as gas expands into the reservoir. If Joule-Thomson cooling during this expansion were large, injectivity and formation permeability could be altered by formation of hydrates, freezing of residual water, and fracturing due to thermal stresses. The TOUGH2/EOS7C module for CO2-CH4-H2O mixtures is used as the simulation analysis tool. For verification of EOS7C, the classic Joule-Thomson expansion experiment is modeled for pure CO2 resulting in Joule-Thomson coefficients in agreement with standard references to within 5-7%. For demonstration purposes, a case with a large pressure drop is presented in order to show that temperature can drop by more than 20 degrees C by this effect. Lower permeability increases Joule-Thomson cooling while lower porosity decreases it for a system with constant-rate injection.
Answer:
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!
Explanation:
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!
WHAT!