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ARE WE ALONE?

ARE WE ALONE?. Osinanna Okonkwo Vinay Prasad Ugochukwu Anyaorah Daniel Reed. P ROBLEM S TATEMENTS. Our Goal as experts in HVAC systems was to respond to a RFQ (Request For Quotation) issued by NASA , for the creation of a housing heating system in the North pole.

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ARE WE ALONE?

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  1. ARE WE ALONE? Osinanna Okonkwo Vinay Prasad Ugochukwu Anyaorah Daniel Reed

  2. PROBLEM STATEMENTS Our Goal as experts in HVAC systems was to respond to a RFQ (Request For Quotation) issued by NASA, for the creation of a housing heating system in the North pole. The house in question is required to support 4 scientists for 4 months, delivering functionality and comfort

  3. CONSTRAINTS • Inside temperature of 25° C • Outside temperature of -40° C • Maintain oxygen at a rate of 32L/min. • Minimize flow rate variation between all registers

  4. PROJECT MANAGEMENT - RACI

  5. THE HOUSE

  6. REQUEST FOR QUOTATION To win the contract we had to achieve the following: • Lowest blower cost • Lowest material cost • Least Labor • Operating Cost • Client Satisfaction

  7. LEAST BLOWER COST

  8. LEAST BLOWER COST • Achieving this goal required minimization of the system pressure drop. To do this we used Flowmaster software to create a Housing Heating System. • A network was created but due to insufficient technical support however the results of this part of the project were inconclusive.

  9. THE NETWORK DUCT PLAN FLOWMASTER

  10. LEAST MATERIAL COST

  11. LEAST MATERIAL COST Achieving this goal required the minimization of rubber coated sheet metal used in making the duct system.

  12. OPTIMIZING MATERIAL USE In order to reduce waste we had to optimize the diameter of the cylindrical straight pipes used in the duct-work. Optimization process: 90in side of sheet  four 22.25in Circumference pipes  7.08in Diameter This minimized cost as none of the coated sheet material was wasted, while still allowing us a good enough pipe diameter for a good flow rate.

  13. TOTAL MATERIAL COST Cost per sheet - $250 Diameter of pipe– 7.08in Circumference of pipe– 22.25in  4 per sheet TOTAL MATERIAL COST - $7,750

  14. LEAST LABOR COST

  15. LEAST LABOR COST To obtain this goal we had to minimize shearing of sheets as well as the use of 90 degree bends and branches due to the high cost of producing them.

  16. TOTAL LABOR COST TOTAL LABOR COST - $2,800

  17. OPERATING COST

  18. OPERATING COST This required the minimization of Energy costs. The cost of maintenance items includes: • monthly natural gas costs • oxygen costs • Electricity costs.

  19. Natural Gas Cost- Heat Requirement 296” Depth: 240” 460 “ • Based on an inside temperature of 25° C • Using peak heat requirement • We Assumed • No heat transfer by radiation • No heat loss from basement to ground • Inside wall dimensions were used for heat transfer surface area

  20. Natural Gas Cost- Heat Requirement • Convection coefficients differed due to orientation and outside or inside location • hin for vertical walls was 8.29 W/m2·°C * (still air) • hin for roof was 9.26 W/m2·°C * (still air) • hout for vertical walls and roof was 34 W/m2·°C* (air at 15 mph and any orientation of wall) * Cengel, Yunus A. Heat Transfer: A Practical Approach. pp 175, Table 3-7. McGraw-Hill Companies, Inc. 2003.

  21. Natural Gas Heating Cost • Heat Requirement: Q = 41655.21 W

  22. Oxygen Costs OXYGEN SUPPLY: OPTION I To supply oxygen to the 4 scientists (each scientist breathes air at 8L/min  32L/min), we decided to utilize PHOTOSYNTHESIS. Name of Plant: Leucaena leucocephala (Pronounced: Loo-Say-Na)

  23. Leucaena leucocephala – Plant Facts • One plant is estimated to produce about 0.22L of oxygen per minute. 32L/min required  0.22L/min per plant  145 plants • Applying a factor of safety of 1.1 we agreed on 160 plants. • Planted at 6in intervals, the plants will occupy approximately a 7ft. X 7ft. Area in the basement. Total Cost = 10c a plant x 160  $16.00 As opposed to 32L/min x 60min/hr x 24hr/day x 120 days = 5529600L 5529600L / 3000L/tank = 1844 tanks 1844 tanks x $1050 per tank = $1,936,200

  24. LEAST FLOW RATE VARIATION

  25. LEAST FLOW RATE VARIATION Again due to lack of technical Support the results of this part of the project were inconclusive. This is due to an incompatibility between software and project.

  26. FINAL COST SHEET • Blower cost - INCONCLUSIVE • Material Cost - $7,750 • Labor Cost - $2,800 • Heating Cost - $21,813.60 • Oxygen Replenishment - $16.00 • TOTAL COST - $32,380

  27. CONCLUSION • Designed a heating network using Flowmaster • Successfully determined heating cost • Successfully determined oxygen replenishment cost

  28. QUESTIONS

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