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A platform for research: civil engineering, architecture and urbanism
Condensing boilers in buildings and plants refurbishment
Highlights ► Condensing boilers can be used in building refurbishment. ► Condensing boilers can attain high seasonal efficiencies even with radiators. ► Variable flow rate circuits require a series of special fittings. ► An economical analysis is carried out.
Abstract Condensing boilers allow better performances when return temperatures from the plant are lower and above all when these temperatures are below the dew temperature of the smoke. That is the reason why many believe that condensing boiler is not suitable for the traditional heating plant terminals: the radiators. Instead the classic control system with weather compensation curve produces relatively low temperatures and an appreciable condensing operation during March, April, October and November. Moreover, condensing boilers allow a better performance than traditional boiler even when they do not perform condensing operation. However for the optimum exploitation of condensing boilers in a radiator plant, variable-flow-rate plants should be selected that permit every outside condition to maintain a high difference between delivery and return temperature. This control selection, which is fully consistent with the use of thermostatic valves, needs variable-flow-rate pumps and, if possible, with proportional head.
Condensing boilers in buildings and plants refurbishment
Highlights ► Condensing boilers can be used in building refurbishment. ► Condensing boilers can attain high seasonal efficiencies even with radiators. ► Variable flow rate circuits require a series of special fittings. ► An economical analysis is carried out.
Abstract Condensing boilers allow better performances when return temperatures from the plant are lower and above all when these temperatures are below the dew temperature of the smoke. That is the reason why many believe that condensing boiler is not suitable for the traditional heating plant terminals: the radiators. Instead the classic control system with weather compensation curve produces relatively low temperatures and an appreciable condensing operation during March, April, October and November. Moreover, condensing boilers allow a better performance than traditional boiler even when they do not perform condensing operation. However for the optimum exploitation of condensing boilers in a radiator plant, variable-flow-rate plants should be selected that permit every outside condition to maintain a high difference between delivery and return temperature. This control selection, which is fully consistent with the use of thermostatic valves, needs variable-flow-rate pumps and, if possible, with proportional head.
Condensing boilers in buildings and plants refurbishment
Lazzarin, Renato M. (author)
Energy and Buildings ; 47 ; 61-67
2011-11-17
7 pages
Article (Journal)
Electronic Resource
English
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