Author(s)

L. Marletta, G. Evola & F. Sicurella

Abstract

Environmental issues in domestic boilers in real operating conditions L. Marletta, G. Evola & F. Sicurella Department of Industrial Engineering, University of Catania, Italy Abstract In recent years, most obsolete central heating systems have been replaced by small, high efficiency gas fired domestic boilers. This new type of heating system is characterized by high energy efficiency (more than 90% at steady state operation) and low environmental impact due to the use of natural gas. On the other hand, under the pressure of environmental concerns, boiler manufacturers have recently developed new technologies aimed at lowering the polluting emissions. However, although small in size, domestic gas boilers, when used in countries with a mild winter climate (such as those of the Mediterranean sea area), are mostly proved to be oversized with respect to the actual energy needed. This results in intermittent operation, with concern raised for energy and environmental issues, because these operating c

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