Post on 03-Jan-2016
description
ME 414: Project #1
Design Team Members: Andy CashKyle BredehoeftAlan KoersBrent Miller
Presentation Date: May 5, 2006
Project Definition
NASA Requests a quote: To design a heating and ventilation system for an
arctic research facility located at the North Pole. Contains four researchers Inside temperature to be maintained at 25 °C Outside temperature is a constant -40 °C No cooling system needed for obvious reasons
Design Constraints
Ducts formed from rubber coated sheet metal: Sheet Size: 70” x 90” Relative roughness: 2mm
Outside Walls 12” thick Inside Walls 8” Register location is fixed
Register Size: 6” x 16” Occupants Require 8 liters of fresh air per
minute
Resistance Network
Room #1 Heat Loss & Cost
Room #1 Mass Flow Rate
Fresh Air Heating
Heat Generation fromBuilding Occupants
Flowmaster Room Model
Return
Register
Junction
Piping
Flowmaster Model
Flowmaster Results
Room Number
Calculated Flow Rate
(m^3/s)
Flowmaster Flow Rate
(m^3/s)
Difference (m^3/s)
1 0.028 0.0077 0.02032 0.029 0.0117 0.01733 0.0185 0.0187 0.00024 0.0219 0.0181 0.00395 0.0244 0.0193 0.0051
Housing Layout
Room 1Room 2
Room 3
Room 4
Room 5
Solid Model Duct RoutingFRESH AIR OUTLET
FRESH AIR INLET
Duct Routing Close-up
Duct Work System
Building Front Section View
Material & Labor Costs
Material Costs
Sheet Width (in.) 70
Sheet Length (in.) 90
Total material area needed (in2) 169,748
Total Number of Sheets 27
Cost per Sheet $250.00
Material Cost $6,736.03
Labor Costs
Shearing Cost $1,347.21
Bend Forming $4,300.00
Branch Forming $1,000.00
Register Hookups $400.00
Total Material and Labor Cost: $13,783.24
800 CFM Fan Curve
800 CFM Fan Results
Fresh Air Inlet Results
800 CFM Pressure Distribution
800 CFM Pressure Distribution
800 CFM Velocity Distribution
Room Air Velocity Below Comfort Threshold of 0.15 m/s
800 CFM Flow Trajectory
800 CFM Flow Trajectory
800 CFM Pressure Dropand Air Changes per Hour
Blower Comparison
Blower Capacity
Volume
Flow m3/s ACHMass Flow kg/s
System Heat Loss Mass Flow Requirement
Maximum Velocity m/s
System dp inches of water
Fresh Air Inlet Mass
Flow m3/s
Fresh Air Outlet Mass
Flow m3/s
Fresh Air Volume Rate
Required m3/s
800 CFM 0.37 2.60 0.45 0.14 6.65 0.33 0.007 -0.007 0.031200 CFM 0.55 3.90 0.66 0.14 11.00 0.83 0.01 -0.01 0.032000 CFM 7.70 55.00 16.60 0.14 372.00 662.00 x.xx x.xx 0.03
Note:•2000 CFM Blower vel_max exceeds 100 m/s •Fresh Air Delivery Insufficient
Blower Operation Cost/Month
Monthly Heating Requirements & Costs
Note:•Total Bldg Q=14,651 BTU/hr •Basement not heated
Room Number Q insulated (Btu/hr) Cost ($/month) Heat Addition of Scientist (Btu/hr) 599121 2853 112.52 Cost savings from heat of scientist ($/month) 23.632 3692 145.61 Fresh Air Heating (Btu/hr) 2557.023 2299 90.68 Cost of fresh air heating ($/month) 100.844 2719 107.225 3088 121.78
Total Cost : 577.81
Operating Costs ($/month): 655.023 Month Cost: 1965.06
Risk Assessment and Contingency
Event of Furnace or Blower Failure
1) Gather at Central Bldg Location
2) Start Generator and Resistance heater
Like
lihood
ImpactHigh Low
Low
Hig
h
Risk Assessment and Contingency
Fresh Air VentilationSystem Frost or Other Blockage
1) Remove Blockage
2) Insure Safe Oxygen Levels
Like
lihood
ImpactHigh Low
Low
Hig
h
Cost Summary
Cost Item Cost
Material and Labor $13,783.24Heating $1,965.06Blower Operation $145.14
$15,893.44 Total
Questions
Special Thanks to: Billy Holland Professor Toksoy