What is JT unit?

“JT” is an abbreviation for Joule-Thomson effect. In 1854, James Joule and William Thomson proved that cooling occurs when a non-ideal gas expands from high pressure to low pressure. This cooling effect can be amplified by using the cooled gas to pre-cool the inlet gas in a gas heat exchanger.

How does a JT work?

HOW DOES A JT SKID WORK? Gas enters the Joule Thomson System and travels through a gas to gas heat exchanger and then a gas-liquid heat exchanger. The gas then passes through the Joule Thomson valve, taking a pressure drop and cooling down to a low of -20°F.

What is gas conditioning skid?

A Gas Conditioning Skid is designed to pre-treat natural gas and other combustible gasses prior to injecting into a critical process or a Gas Turbine Generator. The skid performs two functions; remove all liquid droplets and solid contaminants from the gas, and adjust the gas temperature to the injection requirements.

What is a gas processing unit?

A gas processing unit (GPU) is a modular piece of equipment that is employed, especially in the Marcellus Shale, to perform a majority of the phase separation of the well stream fluids. GPUs arrive on a skid and are prepared to begin processing once they are tied into the flowline, stock tanks, and sales line.

Why is there a Joule Thomson effect?

Joule-Thomson effect, the change in temperature that accompanies expansion of a gas without production of work or transfer of heat. The cooling occurs because work must be done to overcome the long-range attraction between the gas molecules as they move farther apart.

What is natural gas conditioning?

Introduction. The term gas conditioning refers to that portion of the process necessary to meet residue gas specifications. This includes: Gas dehydration to prevent condensation of water. Hydrocarbon dew point control to preventcondensation of hydrocarbons.

What is the purpose of gas processing?

The objectives of gas processing are to produce transportable gas, meet sales-gas specifications, and maximize liquid recovery. Producing transportable gas to a remote location requires the gas to be delivered without allowing condensation of hydrocarbon (HC) liquids.

How is gas processed?

Although natural gas processing has several steps, the main processes include separation, carbon dioxide and hydrogen sulfide removal, dehydration, and NGL recovery. After leaving the gas well, the first step in processing natural gas is removing oil, water, and condensates.

What happens during a throttling process?

For real gases, a temperature drop parallel to the decrease in pressure is observed. Hence, a throttling process is the process of suddenly decreasing the pressure without changing the enthalpy (isenthalpic process) or utilizing work or heat.

How are JT skids used in natural gas processing?

Go! To produce an immediate processing upgrade to your natural gas stream, TransTex has a fleet of JT Skids of various sizes that are readily available and skid-mounted for quick installation. Our processing plants can increase your NGL recoveries by a pressure drop, condensing and removing ‘heavy’ hydrocarbons.

Why do we need a JT gas plant?

Excess liquids that may condense and cause problems in transmission are recovered and stored for fractionation into salable hydrocarbon components. The heavier the hydrocarbons contained in the gas, the higher the GPM value. We keep our pre-designed and packaged JT plants in stock and ready for rapid deployment.

What happens when gas enters a JT unit?

Following gas separation and dehydration, high-pressure gas enters the JT unit through the heat exchanger for cooling. The natural gas stream then passes through a JT valve causing a pressure drop and undergoes a process called “adiabatic expansion.” This means that the gas is expanding in a system where energy can neither enter nor exit.

How does the heat exchanger work in a JT unit?

Increase the recovery of valuable natural gas liquids (NGL). By removing the heavier components such as propane or butane, the producer achieves an immediate processing upgrade, increasing recoveries, and profits Following gas separation and dehydration, high-pressure gas enters the JT unit through the heat exchanger for cooling.