Research Article
Complex Approach to Conceptual Design of Machine Mechanically Extracting Oil from Jatropha curcas L. Seeds for Biomass-Based Fuel Production
Table 1
Decomposition and interpretation of primary user’s needs (machines mechanically extracting oil).
| Primary user’s need | Need decomposition | Interpretation of need (requirement) |
| Low operational cost | Operated by unskilled worker | Low demand for qualification | Low energy consumption | Low power (fuel) consumption | High availability | Low failure rate | Long lifetime | Long lifetime of machine parts |
| High productivity | High labour productivity | Low manual work intensity | Fast filling up of machine | Fast filling up of machine bin | Fast and easy cleaning | Fast and easy cleaning of chamber | Easy spare parts replacement | Quick parts disassembly or assembly |
| High yield of quality oil | High oil yield | High efficiency of extraction | Low waste | High degree of seeds utilization | Clean oil | Low volume of impurities |
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