Centrifugal pumps are one of the most popular and frequently used industrial pumps in India. The rotary motion of the pump generates a centrifugal force that discharges fluids. They are used in a variety of industrial applications like the oil and gas industry, sugar industry, paper mills, chemical processing, and many others. Centrifugal pumps offer various benefits like efficiency, durability, flexibility, and can operate efficiently in low-output pressure and high-volume situations. They are highly energy-efficient and can handle different flow rates. There are several factors that impact the performance of a centrifugal pump. They are:
- The viscosity of the fluid
- Specific density of the fluid
- NPSH (Net Positive Suction Head) and cavitation
- Vapour pressure of the fluid
- Temperature of the fluid
In this post, we take a look at how the temperature of the pumped fluid impacts the performance of a centrifugal pump.
The Role of Temperature in Pump Selection
The temperature range of the fluid that will be pumped plays a crucial role in pump selection. The temperature doesn’t just determine the type of pump to install but also determines the pump components that you need. Here are a few questions that you have to keep in mind, while selecting centrifugal pumps:
- How hot or cold is the pumped fluid?
- What are the specific temperature requirements for this operation?
- Will the pump generate extra heat during operation?
Here’s a Quick Recap on Temperature in Industrial Operations:
Starting from the very basics, temperature is a measure of the heat in a liquid, solid, or gas. Temperature is measured in two scales:
- Centigrade and
Besides these two temperature scales, there are two other temperature scales, that are not so popular. They are:
- Kelvin Scale – Freezing point of water in the Kelvin scale is 273.2 K and the boiling point of water in the Kelvin scale is 373.2K.
- Reaumur Scale – This temperature scale is used in a few European countries. In this scale, the freezing point of water is 0°Re and the boiling point of water is 80°Re
The Impact of Temperature on the Operating Pressure of the Pump
The temperature and pressure are two crucial elements impacting the pump operation. For example, pumping fluids at high temperatures require extra features like special seals, additional gasketing and more. In the pump system, the temperature impacts the operational stability of the pump, the efficiency of various pump components as well as the pressure generated in the system.