Development of Calculation Technique by Designing the Radiative Recu- perators Advanced in Frame of EUREKA Program

• Дата: 2014
• Автори: Sevcsik, M., Kapros, T., Sandor, P., Soroka, B.S.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут газу НАН України 2014
• Назва видання: Энерготехнологии и ресурсосбережение
• Теми: Приборы и оборудование
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/127294
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Development of Calculation Technique by Designing the Radiative Recu- perators Advanced in Frame of EUREKA Program / M. Sevcsik, T. Kapros, P. Sandor, B.S. Soroka // Энерготехнологии и ресурсосбережение. — 2014. — № 3. — С. 56-68. — Бібліогр.: 11 назв. — англ.

The EUREKA project «REPLACE NG» is focused on development and application of radiative (radiative-convective) recuperator of advanced design for heat recovery of flue gases by combustion the fuels including those of low calorific value (LCV gases) in the industrial furnaces of various types. It was supposed that the recuperators are suitable for preheating the flows of combustion air or LCV gases. Recuperators of both purposes could be used by installation at the furnaces fired with LCV gases. Mentioned equipment — recuperator of RRD type — was developed by Gas Institute of NASU (Ukraine). It was supposed accordingly preliminary program and schedule to involve Co. TUKI (Hungary) as the project partner for testing the recuperator arranged at the bell type furnace of Cold Rolling Mill Plant of ISD DUNAFERR Group under the furnace firing with different process gases (alternative fuels) originated by several metallurgical productions. The present paper demonstrates the proposed calculation technique suitable for comparison the thermal state of the new type heat exchangers and the radiative recuperators of traditional wide spread design basing upon computation of heat exchange processes within parallel-current and counter-current flows. The system of simplified differential one-dimensional heat balance and heat exchange equations was composed and used as the computation background. The computation model provides an opportunity to analyse an influence of heat transfer coefficients, mass and volume flow rates and heat fluxes by process of an air preheating due discovering and application the generalizing auxiliary dimensionless parameters. The advantages of new approach to the recuperators designing even by neglecting of an enhancement of heat transfer intensity from both sides of heat exchange surface(s) or from both media flows are connected with increase the heat exchange surface in case of recuperator of RRD type in comparison with ordinary one-stage radiative recuperators. Application of secondary (intermediate) adiabatic emitters arranged in channels for flue gases and air (or LCV gas) flows provides the additional opportunities.