Abstract
This work represents a method for investigating the energy efficiency of fan systems used to transport fluids. Applying the methods of dimensional analysis (DA) enables establishing five dimensionless complexes ( π criteria), including some basic parameters having impacts on the consumed energy used for the transportation of a unit quantity of air. The proposed criterion π 1 includes the specific energy consumption e v (specific fan power SFP), and is used for the quantitative evaluation of the energy effectiveness of the fluid transportation. This criterion also includes the main geometric size of the pipe system (network) and the gas properties. The criterion π 3 indicates the impact of the applied method of flow rate regulation on the effective energy use of fan systems. This criterion includes parameters characterizing the selected method of flow rate regulation: speed ( n ) for using the frequency method and the referred length ( L T P ) of the pipe system for using the throttle method. The established (proposed) dimensionless parameters are used to study a concrete fan system. The obtained results concerning the evaluation of the impact of the two most used methods of flow rate regulation (frequency and throttle), as well as the density variation as a result of the temperature change, on the effective energy use are graphically presented: π 1 = f ( π 3 ) .
Highlights
Union (EU) directives, as well as the decreasing emissions of gases and reducing the continuously rising prices of energy and energy supplying.The systems, used to transport fluids, are widely used in practice
To demonstrate applying the established criteria equations used to evaluate the energy efficiency of a fan system, we studied such a system containing a centrifugal fan BHCH
Applying methods of dimensional analysis enables establishing of dimensionless complexes, which can be used for accomplishing a quantitative analysis of the effective energy use of systems transporting fluids
Summary
The systems (fan and pump), used to transport fluids, are widely used in practice. The energy consumption of such systems, used to drive the pumps or fans, represents a significant part of the global energy use. According to [1], 22% of the global energy consumption of the installed motors is used to drive pumps and 16% for driving fans. It is well-known that the key elements of a system transporting fluids respectively are the fan (or pump) aggregate and the pipe system. To improve the efficiency of an electro-hydraulic aggregate it is necessary to involve high-efficiency machines combined with the relevant control systems
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
