Item Description

When energy increases in water, an increment of the activity between molecules is generated. This causes an increase of the number of molecules that escape from the surface, until the equilibrium state is reached. Such equilibrium state depends on the pressure between the water surface and the vapor. Molecules found in the water surface can escape more easily at a low pressure, requiring a smaller amount of energy to reach the equilibrium state (boiling point). The temperature at a given pressure at which the equilibrium is reached is known as saturation temperature. There is a single saturation temperature value for a saturation pressure and vice versa.

Sci-tech Computer Controlled Saturation Pressure Unit Model BSG 020, is a unit designed to demonstrate the water temperature behavior, as well as the change of the boiling point when there is a variation in pressure. Saturation curves can be obtained with this unit. Besides, the content of water in the wet steam generated by a throttling calorimeter can be determined (steam quality).

Model BSG 020 consists of a water boiler, including a computer controlled immersion heating element, and a sight glass to observe the boiling patterns in the water surface and control the water level in the boiler.

The saturated steam formed in the boiler passes through a throttle valve and is expanded to atmospheric pressure in a throttling calorimeter with the purpose of determining the dryness fraction of the saturated steam.

The temperature and pressure are measured after the boiler to determine the properties of the saturated steam, and after the expansion in the throttling calorimeter. In addition, a force sensor measures the weight of the condensed water.

The unit includes all the safety measures required for a safe operation, such as relief valve and pressure switch to limit the working pressure, and transparent protection panels.

The Unit is optionally supplied with Sci-Cal^R Computer Control System Data Acquisition System.