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Energy Saving Climate Control System
(ESCCS)
Team: Sean Jacobs, Brad Nissenbaum,
Colin Tracy
Advisor: Professor Anderson
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Mission Statement
Environmental- Relieving stresses caused by increasing energy
demands
Economic- Saving the consumer money through decreased
energy use
Engineering- Use sound engineering practices in order to meet
goals and satisfy consumer demands.
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System Outline
•Temperature is measured
•Based on User Settings, Room Environment is adjusted
•Control system is used to adjust fan operation, lighting, and electrochromic glass
Thermostat and User Input dials
Control System
Monitors and Adjusts
Room with Electrochromic glass climate and light changes
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Deliverables
A model enclosure demonstrating the functionality of the ESCCS
All documentation regarding circuit schematics, parts list, testing results and project costs
User’s manual
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System Block Diagram
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System Logic
Initialize Read User
Temperature (Tuser)(On default set)
Measure (binary) Current Temperature
(Tcurrent)
Signbit=1 (negative)
ΔVec = + 0.2V
Vec = max ?
Vfan = on10 seconds
Yes
Wait Time
Yes
ΔVec = - 0.2V
No
Wait Time
No
Subtract significant bits Tcurrent -Tuser
Difference = 0
Vec > max/2 ? Signbit=0 (positive)No
Vlight = on Yes
Vlight override
Vec override
Vec = 0V ?
Vec override
on?No
Vlight override
on?
Yes
Vec < max/2 ?
No
Vlight = off
Yes
No
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Description of System Logic
After initialization, the current temperature is measured.
The user temperature is compared to the current temperature, and the next action in order to meet the desired temperature is decided based on this comparison.
Wait times are incorporated in order to take into account small temperature changes.
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MDR Deliverables
Assembled test enclosure with sensors Interior lighting PV panel Ventilation fan Some preliminary test data Refined plans for remainder of project
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Assembled Test Enclosure
Our test enclosure is fully assembled with lighting and fan installed. The sensors have been selected, and we can begin initial testing of heat levels in our prototype living space.
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Enclosure Design and Materials
Polyisocyanurate foam insulation sandwiched between ¼ inch plywood.
70 Dergee tilt on front panel
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Power system
We decided that in order to minimize our expenses, we would recycle the solar panel and charge controller from an SDP project from two years ago.
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Sensor Selection
Our temperature sensors were selected with desired temperature range of 5-35 C with a small error and a low power consumption.
Sensors are digital.
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Microchip Selection
Our microchip was selected with low power but with enough pins to collect all necessary data and comparators to calculate the needed changes for our system.
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Window Test Data
0
10
20
30
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3
Volts
% l
igh
t tr
ansm
itte
d
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Next Steps
1. Programming
2. Control circuitry1. Windows
2. Fan
3. Light
3. Power circuitry
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Problems Encountered
Low fluctuating impedance of variable opacity mirrors.
Digital temperature sensors, uSOP packaging
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Questions and Answers