摘要：Combi boilers offer an economic alternative to individual
single function gas boilers and instantaneous water heaters. These gas
appliances allow for producing thermal energy for two heating purposes
(space heating and hot water preparation). For this reason these compact
and highly efficient devices are becoming increasingly popular in many
residential buildings. The application of such heating systems often
requires an adequate approach for determining the natural gas demand. The
literature indicates several methods for this purpose, which often differ
significantly. Differences in calculated results seem to be the main problem
with these methods. Unfortunately, the selection of the above-mentioned
gas appliances always causes overestimation of natural gas demand. This is
mainly due to the fact that many calculation methods contain incorrect gas
demand coefficients. Therefore, this paper presents various methods for
estimating gas consumption for multi-family buildings. It provides
discussion and analysis of various calculation methods for residential
buildings equipped with two types of gas appliance. The performed
analysis made it possible to indicate the most reliable methods of gas
demand calculation.
其他摘要：Combi boilers offer an economic alternative to individual single function gas boilers and instantaneous water heaters. These gas appliances allow for producing thermal energy for two heating purposes (space heating and hot water preparation). For this reason these compact and highly efficient devices are becoming increasingly popular in many residential buildings. The application of such heating systems often requires an adequate approach for determining the natural gas demand. The literature indicates several methods for this purpose, which often differ significantly. Differences in calculated results seem to be the main problem with these methods. Unfortunately, the selection of the above-mentioned gas appliances always causes overestimation of natural gas demand. This is mainly due to the fact that many calculation methods contain incorrect gas demand coefficients. Therefore, this paper presents various methods for estimating gas consumption for multi-family buildings. It provides discussion and analysis of various calculation methods for residential buildings equipped with two types of gas appliance. The performed analysis made it possible to indicate the most reliable methods of gas demand calculation.
