Natural Gas Consumption1 ME 414 HVAC Project Michael Stark Joshua Keith Billy Burdette Brandon Mullen Joseph Listerman.
Post on 28-Mar-2015
218 Views
Preview:
Transcript
Natural Gas Consumption 1
ME 414 HVAC Project
Michael Stark
Joshua Keith
Billy Burdette
Brandon Mullen
Joseph Listerman
CUMMINS CONFIDENTIAL 2
Develop A Charter
Why Statement Business case – What is the project purpose?
• Reduce cost of heating the studied household• Obtain a better understand of the HVAC process and
analysis• Scope of data and calculations involved
CUMMINS CONFIDENTIAL
Types of Process Maps
Detailed Process Map Effectively shows input and outputs
Includes parties effected by the process
Flow-Chart Process Map Excellent method for visually envisioning a process
Visually displays outcomes dependent on situations
CUMMINS CONFIDENTIAL
SIPOC Process Map
ME 414 – 6S Approach 6
Supplier
Homeowner
Homeowner
Insulation Contractor
Homeowner
Homeowner
Mite - E - Ducts
Furnace
Gas bill
Temperature Sensor
Prof. Toksoy
Temperature Sensor
Homeowner
Homeowner
Input
Set desired temperature
Remove old filter, insert new filter
Add insulation to walls and ceiling, increase R value
Caulking, replace door and window seals
Set desired temperatures and times
Vacuum duct work
Thermostat turns furnace on
Fuel burning
Record time furnace is running
A file
Voltage
Hot water usage, shower, cleaning, washer, dishwasher...
Turn the stove knob on
Process
Adjust Thermostat
Change furnace filter
Improve Insulation
Seal doors and windows
Program temperature cycling
Clean ducts
Burning Gas
Measure volume of fuel consumed
Measure heat generation by furnace
Measure heat gen. from other sources
Measure Outside Temp.
Measure fuel consumption by water heater
Measure fuel consumption by stove
Output
Turn furnace on/off
Reduced resistance to air flow
Decreased heat loss
Decreased heat loss
Moderate gas consumption during off-peak hours
Improved air flow
Fuel is consumed
Heat usage in therms
Amount of fuel used to maintain inside temperature
Contribution of electrical appliances to interior temp.
Rate of heat loss due to temperature difference
Amount of fuel volume not used for heating
Amount of fuel volume not used for heating
Customer
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
Homeowner
CUMMINS CONFIDENTIAL 8
Flow-Chart Process Map
ME 414 – 6S Approach
CUMMINS CONFIDENTIAL 9
Critical Parameter Management
Defines energy consumption in household Where energy is
distributed in house
Shows locations of heat loads in a household Supplemental heat
production
Allows analysis of heat load paths in the household Shows several different
paths in one figureME 414 – 6S Approach
CUMMINS CONFIDENTIAL 10
Critical Parameter Map
ME 414 – 6S Approach
CUMMINS CONFIDENTIAL 11
Critical Parameter Map Continued
ME 414 – 6S Approach
CUMMINS CONFIDENTIALThis is a Header 12
Measurements
Household Measurements Rooms:
• Dimensions • Windows• Doors• Height• Floor Area
Furnace on time measurement HVAC register outlet temp
Outside Temperature Measured LM34 temperature sensor
HIH4000 Humidity sensor
LTC1298 A/D converter
Measure
HVAC Register Outlet Temp
CUMMINS CONFIDENTIAL 13
House Layout
ME 414 – 6S Approach
Basement Floor
First Floor
Second Floor
CUMMINS CONFIDENTIAL 16
Heat Loss Analysis Assumptions
Basement floor temperature is assumed to be 55°F
Ground temperature data taken from ground chart at right.
Basement is an underground room with window wells.
Windows are exposed to outdoor temperatures.
ME 414 – 6S Approach
CUMMINS CONFIDENTIAL 17
Heat Transfer Surfaces
The chart below displays the percent total area where heat loss occurs for three primary types of surfaces.
ME 414 – 6S Approach
92%
7%1%
Areas in House
WallsWindowsDoors
CUMMINS CONFIDENTIAL 18
HDD Calculated vs. Published
ME 414 – 6S Approach
25 30 35 40 45 50 550
10
20
30
40
50
60
f(x) = 0.939770506589167 x + 1.97304204038683R² = 0.990190778150552
HDD Calculated vs. Published
Calculated HDD (°C)
Published H
DD
(°C
)
CUMMINS CONFIDENTIAL 21
Calculated Data
ME 414 – 6S Approach
25 30 35 40 45 50 550.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
f(x) = 0.0685639124116851 x + 0.418724708122463R² = 0.586995928816416
Furnace On Time vs. Calculated HDD
Calculated HDD (°C)
Furn
ace O
n T
ime (
hours
)
CUMMINS CONFIDENTIAL 22
Calculated Data
ME 414 – 6S Approach
25 30 35 40 45 50 550.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
f(x) = 0.0714691011235955 x + 0.332847913322632R² = 0.568859861417215
Furnace On Time vs. Published HDD
Published HDD (°C)
Furn
ace O
n T
ime (
hours
)
CUMMINS CONFIDENTIAL 24
Calculated Data
ME 414 – 6S Approach
22-Jan 28-Jan 29-Jan 3-Feb 4-Feb 5-Feb 6-Feb0
10
20
30
40
50
60
70
Number of On - Off Cycles
Calculated # of On - Off cycles Plotted # of On - Off cycles
CUMMINS CONFIDENTIAL 34
Total Heat Loss on Sampled Days
ME 414 – 6S Approach
40200 40206 40207 40212 40213 40214 40215
0
2000
4000
6000
8000
10000
12000
14000
Total heat loss (watts) per day
Data
CUMMINS CONFIDENTIAL 35
Total Heat Loss over 7 days
Percent total heat loss for each of the three primary surfaces in the house.
Notice this is not proportional to the total areas where heat transfer occurs.
The walls comprised 90% of the heat transfer area, but just over 50% of the total losses.ME 414 – 6S Approach
top related