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