What is a pressure temperature diagram?

What is a pressure temperature diagram?

The simplest phase diagrams are pressure–temperature diagrams of a single simple substance, such as water. The axes correspond to the pressure and temperature. The phase diagram shows, in pressure–temperature space, the lines of equilibrium or phase boundaries between the three phases of solid, liquid, and gas.

What is the mathematical equation between temperature and pressure?

P/T = K. This pressure-temperature relationship is usually called Gay-Lussac’s law in honor of Gay-Lussac, who was first to uncover the relationship.

What is high pressure and high temperature?

What is HPHT? ( High Pressure, High Temperature) HPHT or High Pressure, High Temperature is defined as those Wells with a bottom hole temperature greater than 150°C (300°F) and requiring pressure control equipment with a rated working pressure of above 69 MPa (10,000psi) (S.P.E E&P Glossary, HPHT, 2013).

Does lower pressure mean higher temperature?

For example, if air pressure increases, the temperature must increase. If air pressure decreases, the temperature decreases. It also explains why air gets colder at higher altitudes, where pressure is lower.

How does the temperature and pressure affect changes in phase?

Both temperature and pressure can be measured, and state changes can be observed. When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).

When pressure increases what happens to temperature?

For example, when the pressure increases then the temperature also increases. When the pressure decreases, then the temperature decreases.

What is PT diagram?

A P-T diagram is the most common way to show the phases of a substance. Figure 9 is the P-T diagram for pure water. A P-T diagram can be constructed for any puresubstance. The line that separates the solid and vapor phases is called the sublimation line.

What is the gradient of a pressure temperature graph?

Pressure is on the y-axis, and temperature is on the x-axis. The graph is a straight line with a positive slope passing the origin. The equation of the line is P = kT, which is the equation of Gay-Lussac’s law, and the slope of the line is k. As temperature approaches zero kelvin, pressure also approaches zero.

What is the average life-cycle of a well?

The well clogging/cleaning cycles and well replacement schedules during the 75-year life-cycle period of this analysis are shown in Figure 4. We assume the LCS well to last 25 years, whereas the HSLA well lasts 40 years and the SS well has a 75-year life (Figure 4).

What is the cut-in and cut-off cycle of a well pump?

This is referred to as the cut-in and cut-off cycle of the well pump. You just need those two numbers: The amount of water in gallons, of the drawdown of the pressure tank; and the time in seconds it takes for the well pump to fill up an empty pressure tank!

What factors affect the life expectancy of a water well?

Mineral level and type of minerals in water supply, or amount of sediment in the water supply are important features in the life expectancy of a water well. In areas of hard water, minerals in the water tend to clog the rock fissures through which water flows into the well – harder water clogs the fissures faster, reducing well output.

What is the pressure tank drawdown cycle?

This is known as pressure tank ‘drawdown’. Then the next step is to time (in seconds) how long it takes for your well pump to turn on and then turn off. This is referred to as the cut-in and cut-off cycle of the well pump.