Technical and Economic Efficiency After the Boiler Room Renewal

Myroniuk, Khrystyna; Voznyak, Orest; Yurkevych, Yuriy; Gulay, Bohdan

doi:10.1007/978-3-030-57340-9_38

Cited by 17 publications

(2 citation statements)

References 10 publications

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“…Most of the existing heat supply systems do not connect new subscribers, and, therefore, at the moment the estimated capacity is known. When reconstructing centralized heat supply systems, in addition to replacing the main equipment, it is necessary to replace heating networks [12,13].…”

Section: It Is Shown That the Oee Indicator Allows One To Characterize The Efficiency Of Both The Heat Supply System As A Whole And Its Imentioning

confidence: 99%

Improvement of methods of comprehensive assessment of the operation efficiency of centralized heat supply systems in municipal heat power engineering

Kozlov

Kovalchuk

Klymchuk

et al. 2021

EEJET

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The possibility of a comprehensive assessment of the efficiency of the operation of a district heating system based on the indicator of the overall efficiency of the equipment OEE (overall equipment efficiency) and its extension to the system as a whole is considered. The disunity of the direction of existing approaches in assessing the efficiency of operation of district heating systems does not allow a comprehensive assessment of the overall efficiency of the functioning of the technological sequence of the entire system. It is proposed to consider efficiency as the probability of full functioning of all elements of the heat supply system. It is shown that the heat output of the boiler house is proportional to the power consumption of the boiler house and is approximated by a periodic function. It is shown that the main element of the heat supply system, which determines its efficiency, is the heat-generating source. As a result of the study, it is determined that the efficiency of the heat-generating source functioning increases as the maximum value of its efficiency is reached. Numerical modeling has shown that the flexible use of the installed heat generator capacity contributes to an increase in the efficiency factor from 0.53 to 0.70 and the overall efficiency of the heat supply system can be increased by more than 30 %. When designing a boiler house, it was recommended to provide for the installation of capacities with gradation 1; 0.5; 0.25. It is shown that the OEE indicator allows one to characterize the efficiency of both the heat supply system as a whole and its individual components, and can be used in the design and analysis of the operation of systems

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Section: It Is Shown That the Oee Indicator Allows One To Characterize The Efficiency Of Both The Heat Supply System As A Whole And Its Imentioning

confidence: 99%

Improvement of methods of comprehensive assessment of the operation efficiency of centralized heat supply systems in municipal heat power engineering

Kozlov

Kovalchuk

Klymchuk

et al. 2021

EEJET

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“…Microclimate of premise should be also improved due to energy saving measures of heat source [39], building walls [40,41], heating system [42 -44], ventilation system [45] and gas and heat supply systems [46,47]. It is advisable to use also exhaust air heat and recuperation [48,49] for energy saving.…”

Section: Introductionmentioning

confidence: 99%

Analysis of air jets velocity attenuation at special initial conditions

Voznyak¹,

Spodyniuk²,

Savchenko³

et al. 2022

Diagnostyka

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The article is devoted to solving the significant problem of efficiency increasing of air distribution in the premise by swirl air jet. The aim of the article is to decrease coefficient of velocity attenuation due to intensification of initial turbulence of different air streams leakage from the air distributor and to obtain of analytical equations for calculation of air distribution in a room to ensure the normative indoor air parameters. Effect of flow twisting results in a reduction of the velocity attenuation coefficient by 2.4 times. The regression analysis testified that the attenuation coefficient of the swirl air jet is more affected by the angle of the twisting plates inclination and less affected by the angle of change of the air flow direction. The attenuation coefficient of all types of rectangular air jets is more influenced by the the ratio of the sides of slit b/l and the angle of change of the air flow direction is also less affected. To minimize the attenuation factor, it is effective to use air distributors at smaller swivel plates inclination angles for swirl air jets and a smaller slit size ratio for all types of rectangular air jets.

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