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Tumpeng is one of the ceremonial facilities used almost in every Hindu religious ceremony. Many people take advantage of these opportunities as a home-based business. At present the craftsmen encounter obstacles in the process of drying the cone. Currently the drying process still uses the manual method, namely by drying it by utilizing direct sunlight. In the previous research, the product planning for cone drying machine has been carried out, where the results obtained from this study are an increase in the productivity of the drying machine from the drying machine which was previously used by the cone maker of 683.33%. Although there is an increase in the productivity of the drying machine, the air distribution at each level of the rack is not evenly distributed, so the drying machine needs to be reviewed so that the air distribution in the drying chamber becomes more evenly distributed between the racks. From the results of studies conducted by the hot air entering the drying chamber from the results of the previous engine design, it is likely that conditions on level 1 shelves and level 2 shelves have temperatures that are quite high compared to other rack levels because this air is circulated at level 3, 4.5 and 6. To get the air distribution between the level of the rack evenly, it is necessary to do a redesign of the tool. The alternative that can be done is by circulating hot air from rack 1 to rack 6, another alternative is to try variations in air distribution in the drying chamber by varying the cone seat holes. The redesign method that was carried out was to replace the existing distribution before the air out of the level 3 blower in the rack was changed to the air out of the level 1 rack entry blower, and the cone seat was made varied by random holes, concentric holes and zigzag holes. From the results of engine redesign after testing the air distribution in the drying chamber with a random hole stacking model, the highest temperature is found in almost all shelf levels, except at the level 1 rack the highest temperature is achieved by a concentric perforated pedestal model that reaches 183 °C. Judging from the hot air distribution, the randomly hollowed cone seat model provides a more even distribution of hot air compared to the concentric and zigzag hollow cone seat model.

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Cooling machines have a direct contribution to environmental damage including depletion of ozone layer and global warming caused by the leakage and discharge of synthetic refrigerants (HCFC and HFC) into environment. The discharge of refrigerant into the environment is 60 percent of service sector. Some obstacles found when making a model of a refrigerant waste treatment system since it could only be used for CFC (R-12)/R-134a refrigerants. This research aims at redesigning a machine made beforehand thus it can process various refrigerant wastes used in hospitality industries which involved several components such as compressors, oil separators, filters and distillers for recycling R410A refrigerants. By having this ability, all refrigerant waste can be recycled. Result shows that the redesigned machine can recycle refrigerant waste and the signal can be reused. Calculation results on COP cooling system using pure R 410A showed 4.5, whereas by using recycled R 410A refrigerant 4.3 was obtained. COP using recycled refrigerants was lower than the one using pure refrigerants due to contamination of dirt, oil and other elements. However, with COP value of 4.3 the system performance is still good, therefore the recycled R410A refrigerant can be reused.