The objective of this research is to use mangosteen shell that from household wastes for produce the fuel briquette. This fuel is used in terms of renewable energy which instead of firewood and charcoal from natural forest. We used the adhesive paste as a binder and briquette with hand pack filler. The results showed that the mangosteen shell can be burned to charcoal black and lightweight. By grinding mangosteen charcoal into small size these charcoals were mixing with the paste. We have to compress the mixing charcoal molded into fuel briquettes. These briquettes are performed the stable and non-broken products. After sun drying the results of potential energy testing showed that the calorific value 5920 cal/g combustion rate 11.8 g/min fixed carbon content 61.7% and ash content 7%. For the combustion efficiency testing our fuel briquette could be performed cooking as well non-explosion high combustible non-soot non-smoke and non-odors during used. These fuel briquettes are suitable for fuel products in household community or commercial production and industrial. Due to these advantages our briquettes are possibly to instead of firewood and charcoal from natural forest which can be reduced the global warming by another way.

At present in Thailand single cylinder small engines have been used generally for agriculture. This leads to large amount of fuel import while the price of fossil fuels rise continuously. The Department of Alternative Energy Development and Eff iciency Ministry of Energy decided to draft the minimum energy eff iciency standard for small engines by studying and testing specif ic fuel consumption of gasoline and diesel engines based on the JIS B 8017 and TIS 787-2551 standards respectively. Results of the experiment revealed that specif ic fuel consumption of gasoline engine was higher than diesel engines between 39% and 49% at equivalent energy supply. However the limitation of maximum and minimum energy eff iciency for gasoline engine is still necessary in order to enhance energy eff iciency of small engines manufactured in Thailand

The research was aimed at studying 1) fuel energy saving of automobile drivers in Nonthaburi province 2) a correlation between cause and effect on fuel energy saving of automobile drivers in Nonthaburi province and 3) a model made for assessing fuel energy saving of automobile drivers in Nonthaburi province. The questionnaires were constructed as a tool for collecting data from 2389 automobile drivers who had been getting their car filled in gas station in Nonthaburi province. The statistics used for analysis were SPSS version 17.0 with frequency distribution percentage arithmetic mean K related samples and path analysis. The research finding indicated that the 98.06 percents of automobile drivers in Nonthaburi province had knowledge about fuel energy saving the 87.99 percents had agreeable attitude towards fuel energy saving and the 80.59 percents had operated fuel energy saving. They all had different levels of knowledge attitude and operation. It showed that the automobile drivers with knowledge and agreeable attitude didnt sometimes put it into operation and they sometimes had disagreeable attitude in spite of having knowledge. The result of hypotheses tests at the statistical significance of 0.05 showed that the types of fuel energy used in the car a change of types of fuel energy used in the car knowledge provided about fuel energy saving in the car knowledge and attitude towards fuel energy saving in the car correlated with fuel energy saving of automobile drivers in Nonthaburi province. Moreover a model made for assessing fuel energy saving of automobile drivers in Nonthaburi province was

The research in the aim for useless material from cashew nut shell produce are heating energy briquettes to use recompense energy fine wood and charcoal from natural. By the flour paste is join together pass procedure heating briquettes with hand press implement. It is cashew nut shell can make to burn with earthen stove high temperature stove and steel stove from cashew nut shell are still shape and have bring into fine crush machine receive dust charcoal. It is mixed dust charcoal with flour in ratio 5:1 (by melt flour into hot water one liter until flour paste) mixed and bring into heating briquettes with hand press implement receive heating energy briquettes are no broken. When we bring expose to the sun until dried. After that to test efficiency of heating energy to see that cashew nut shell can to produce are heating energy briquettes. It use heating energy in home family in community replace to use from fire wood and charcoal from natural and heating energy briquettes from cashew nut shell can to use a make cooking well no broken fire well and height heater. It is suitable to produce heating energy for to use home family communities or commercial production and industries are use heating energy from fire wood and charcoal.