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UCL IEP Challenge 1 China Group 9
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  T ABLE  1 PAIR - WISE   COMPARISON   OF   DESIGN   CRITERIA    Safety Affordability Durability Efficiency Compactness TotalSafety  Safety Safety Safety Safety 4.0 Affordability  Tie Tie Affordability 2.0 Durability  Tie Durability 2.0 Efficiency  Tie 1.5 Compactness  0.5 T ABLE  2 FINAL   RANKING   OF   DESIGN   CRITERIA  WeightSafety  4.0 Affordability  2.0 Durability  2.0 Efficiency  1.5 Compactness  0.5   1  T ABLE  3 DECISION   MATRIX    FOR   DESIGN   CONCEPTS   SafetyAffordabilityDurabilityEfficiencyCompactnessTotal Weighting  4.0 2.0 2.0 1.5 0.5 Manure Digester (Collaborative)  by China Group 9 Grade (out of 3) Explanation 3  Airtight system that captures odors & gases. Filter removes harmful gases e.g. H 2 S from fermentation. 1 Digester can be constructed using cheap materials. Temperature control system uses solar panels which inflates costs. 3 Dependent entirely on quality of construction and input parts -> benefit of the doubt 3  Airtight system that captures odors & gases. Manure tank temperature controlled. 3 Digester is scalable and placed underground 13 Weighted Grade 12264.51.5 26 Methane Capture Plant  by Enrique García-Calvo Conde Grade (out of 3) Explanation 2  Airtight system that captures odors & gases. No filter -> harmful gases produced in fermentation process e.g. H 2 S not removed 3 Plant can allegedly be built using cheap materials such as bricks and plastic 3 Dependent entirely on quality of construction and input parts -> benefit of the doubt 1  Airtight system that captures odors & gases. Manure tank not temperature controlled 3 Plant is allegedly scalable, and is underground 12 Weighted Grade 8661.51.5 23 Manure Digester  by Gege Man Grade (out of 3) Explanation 2 Potentially airtight system that captures odors & gases (benefit of the doubt). No filter -> harmful gases produced in fermentation process e.g. H 2 S not removed 1 The choice of using solar panels to heat manure inflates costs 3 Dependent entirely on quality of construction and input parts -> benefit of the doubt 3  Airtight system that captures odors & gases. Manure tank temperature controlled 1 Large number of components that are above-ground e.g. manure preprocessor, solar panel and fermentation tank 10 Weighted Grade 8264.50.5 21 Biogas Generator  by Zhedong Zheng Grade (out of 3) Explanation 2  Airtight system that captures odors & gases. No filter -> harmful gases produced in fermentation process e.g. H 2 S not removed 2  All components can be obtained inexpensively, but there are many specific parts to the single-body construction 3 Dependent entirely on quality of construction and input parts -> benefit of the doubt 1  Airtight system that captures odors & gases. Manure tank not temperature controlled 3 Entire construction is a single unit that makes e ! cient use of space 11 Weighted Grade 8461.51.5 21 Manure Digester  by Yi Jun Wu Grade (out of 3) Explanation 2 Captures odors & gases but possible leak of gases in manure tank (1). Filter (2) removes harmful gases e.g. H 2 S from fermentation. 2  All components can be obtained inexpensively, but there are many specific parts 3 Dependent entirely on quality of construction and input parts -> benefit of the doubt 0 Not airtight so possible leak of gas pressure in manure tank (1). Manure tank not temperature controlled 1  A bove-ground processing of manure and storage of methane occupies relatively large amount of space 8 Weighted Grade 84600.5 18.5 CO 2 Transport System  by Jessica Rei  This design was not consistent with our design brief i.e. not a system that captured methane from manure. However, the transport and storage system of this design was integrated into Manure Digester (Collaborative) - the highest-rated design. N/A Small Scale Solar Setup  by Bandi Enkh-Amgalan This design was not consistent with our design brief i.e. not a system that captured methane from manure. However, the solar energy aspect of this design was integrated into Manure Digester (Collaborative) - the highest-rated design. N/A Sun Saluter  by Tahmid Ali  This design was not consistent with our design brief i.e. not a system that captured methane from manure. However, the solar energy aspect of this design was integrated into Manure Digester (Collaborative) - the highest-rated design. N/A Two-Way Solar Setup  by Quazi I Haque This design was not consistent with our design brief i.e. not a system that captured methane from manure. However, the solar energy aspect of this design was integrated into Manure Digester (Collaborative) - the highest-rated design. N/A   1
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