Abstract
In order to solve the environmental pollution problem caused by winter heating of rural residential building in northern of China, in this paper a biomass gasification (BG)-solid oxide fuel cell (SOFC) combined heat and power (CHP) system has been establishedand numerically investigated. Taking a rural village around Xi’an which is an ancient city and located at central of northern China as the study object, according to heat and electricity output of the system and the heating and electrical load characteristics of the residential building of village, the energy saving ratio and economical efficiency of the CHP system under three different operation schemes compared with the traditional energy system have been analyzed. The results show that the operation scheme for heating designated rooms in rural buildings and meeting the average heat demand of users is the most energy-efficient and economical way. The primary energy saving rate and annual cost saving rate can reach 18.0% and 10.3%, respectively. When the user’s heat and power load demand is clear, the closer the system’s output heat and power ratio to the user’s heat and power load ratio, the more significant the system’s energy saving effect.
Highlights
With the intensification of global warming trends, increasing pressure on environmental protection, and the increasing scarcity of fossil energy sources, the use of renewable energy is becoming more and more popular in the world, which has become one of the promising energy sources supporting the sustainable development of human society
There are a lot of biomass resources in northern China, after the harvesting of crops how to deal with a large amount of straw become a big problem
The results show that the primary energy utilization rate of the system is 37.58%, compared with the traditional system, the primary energy saving rate is 17.12%
Summary
With the intensification of global warming trends, increasing pressure on environmental protection, and the increasing scarcity of fossil energy sources, the use of renewable energy is becoming more and more popular in the world, which has become one of the promising energy sources supporting the sustainable development of human society.
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