Abstract
The thermal efficiency increase of boiler plant is actual task of scientific and technical researches. The optimization of boiler operating conditions is task complex, which determine by most probable average load of boiler, operating time and characteristics of the auxiliary equipment. The work purpose – the determination of thermodynamic efficiency increase ways for boiler plant with a gas-tube boiler. The tasks, solved at the research are the calculation of heat and fuel demand, the exergetic analysis of boilerhouse and heat network equipment, the determination of hydraulic losses and exergy losses due to restriction. The calculation was shown that the exergy destruction can be reduced by 2.39% due to excess air reducing to 10%; in addition the oxygen enrichment of air can be used that leads to reducing of the exergy destruction rate. The processes of carbon deposition from the side of flame and processes of scale formation on the water side leads to about 4.58% losses of fuel energy at gas-tube boiler. It was shown that the exergy losses may be reduced by 2.31% due to stack gases temperature reducing to 148 °C.
Highlights
One of the most important actions to efficiency increase of boiler plant is correct choice of capacity and boiler amount for projected heat supply source [1,2,3]
It was found that the loss with heat of stack gases, which is the main source of energy losses and leads to 82.3% of total heat losses due to very high stack effluents temperature at funnel, is only 8.7% of total exergy destruction
It was established that the heat and exergy efficiency of researched boiler was not optimal due to excessive losses at combustion chamber, steam generator and funnel
Summary
One of the most important actions to efficiency increase of boiler plant is correct choice of capacity and boiler amount for projected heat supply source [1,2,3]. The optimization of boiler operating conditions is task complex, which determine by most probable average load of boiler, operating time and characteristics of the auxiliary equipment [4,5,6,7]. The work purpose – the determination of thermodynamic efficiency increase ways for boiler plant with a gas-tube boiler. The tasks, solved at the research are the calculation of heat and fuel demand, the exergetic analysis of boilerhouse and heat network equipment, the determination of hydraulic losses and exergy losses due to restriction. The work scientific novelty is applying of modern exergetic analysis methods to new object of research – gastube boiler and boilerhouses, equipped this boilers. The work novelty – the known data improvement and addition about research object and topic
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