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- Title
Аналіз розподілу параметрів і ефективності енергетичних процесів в гідравлічних і аеродинамічних системах
- Authors
Арсірій, В. А.; Бутенко, О. Г.; Смик, С. Ю.; Кравченко, О. В.
- Abstract
An analysis of the methods for constructing the energy characteristics of pumps and fans showed the features of the representation of processes in aerodynamic systems and the method of regulating the supply of fans or smoke exhausters in the negative pressure or vacuum zone. It is shown, that the contradictions of the structural- parametric models of aerodynamic systems are the cause of the problems of the operation of energy facilities. The main problem of thermal power engineering is the "boiler capacity limitations" due to the insufficient performance of aerodynamic systems. A comparison is made of two options for increasing the power of boilers by increasing the performance of aerodynamic systems. Option 1 - replacing the fan or its electric motor with more powerful ones provides an increase in air supply to the boiler by 48%, while the specific energy consumption for the drive increases to 2.7. Changes in efficiency when replacing a fan are determined by the fan efficiency only, which maintains high values. To increase the air supply to the boiler, a new method has been proposed by improving the flow parts and aerodynamic processes in the auxiliary elements of the system without replacing the fan. In this case, the first place in calculating the efficiency of the system can be attributed to the specific reduction in energy costs for the fan drive. The adjustment of the flow parts of the auxiliary equipment of the boiler aerodynamic system allowed increasing the fan flow by more than 35%. The specific energy consumption is reduced to 1.05. However, the fan efficiencyhas decreased significantly. Thus, the fan efficiency does not correctly reflect the efficiency of the aerodynamic system. o correctly assess the effectiveness of aerodynamic systems, it is proposed to calculate two performance indicators. Fan efficiency shows the efficiency of converting electrical energy into aerodynamic. To assess the effectiveness of dynamic processes it is proposed to develop unified indicators of potential and action. The ratio of the dynamic component of power or action to the initial potential can characterize the efficiency of aerodynamic processes in the system.
- Subjects
THERMAL engineering; FANS (Machinery); ELECTRICAL energy; ENERGY consumption; AIRDROP; ELECTRIC motors
- Publication
Refrigeration Engineering & Technology, 2019, Vol 55, Issue 3, p177
- ISSN
0453-8307
- Publication type
Article
- DOI
10.15673/ret.v55i3.1576