Rural Straw Briquetting Direct Combustion Heating Systems Life Cycle Assessment And Analysis Of Comfort

In most rural areas,the coal fired hand burning stove are used for household heating at present.With the improvement of environmental protection requirements,the mode of straw briquette direct fired heating has become the main push of the local government to replace the coal-fired heating.On the basis of rural straw briquette direct fired heating system in the mode of household heating/centralized monitoring,this paper uses the Life Cycle Assessment Method to study the energy efficiency,the coefficient of resource depletion,the environmental impact load and the economical efficiency of the straw briquette fuel throughout its life cycle.Comparison to the heating mode of coal fired hand burning stove,the results show that the straw briquette fuel heating has more advantages in environmental implication and economical efficiency than the coal burning heating."Coal furnace and radiator" with " hot blast stove and air duct " are the main forms for rural household heating now.Both them can meet the basic needs for heat of the users,but there is big difference from the perspective of indoor comfort.In this paper,Airpak simulation software is used to analyze the distribution of the indoor temperature and flow field in rural area.And the cloud picture of the temperature field,flow field,predicted mean vote(PMV),and the predicted dissatisfaction percentage(PPD)are gained.Meanwhile,the effect of both heating modes radiator and hot-blast heating on the indoor temperature and flow field and the indoor comfort is discussed.The results show there is obvious temperature gradient in the hot air heating system.In contrast,the radiator heating system is more suitable for rural areas for its indoor temperature distribution being more uniform and for that there is more comfort and less dissatisfaction.The results of this paper are of guiding significance for the application of the technology of the straw pressing in the rural areas and the application of centralized monitoring mode.The results of this study provide a scientific basis for the replacement of straw briquette fuel,provide the decision support for the industrial promotion of the direct fired heating system in the rural areas.