industrial final presentation from lyd
TRANSCRIPT
T. Nuttall, L. Jim, J. Stevenson, C. Grimshaw, R. Lee, A. Saunders & H. Owens
PHY 346TATA Group Industrial Project: Unglazed Transpired Solar Collectors
Design Brief
How does surface microstructure affect the retention of the thermal boundary layer?
Wind
TSC
Building
Wall
Fan
PlenumSun
Hot Air
What is the effect on performance of a heat reflecting wall?
Development
Surface Structure
Stereolithographic Approach
Adhesion
Hydraulic Press
Rig Operation
Method
Efficiency:
Lamp Stability
0 50 100 150 2000
100
200
300
400
Time (minutes)
Irradiance (W/m^2)
Lamp Stability
0 50 100 150 2000
20
40
60
80
100
Time (minutes)
Lamp Temperature (◦C)
Effect of Mass
848 852 856 860 8640
20
40
60
80
100
Mass (g)
% Efficiency
Wind Effect on Thermocouple Measurements
0 20 40 60 80 100 12023.25
23.5
23.75
24
With FanWithout Fan
Time (s)
Temperature (◦C)
Tests and Results
Different Backing Material
0 50 100
Matte Black Tape Avg 863.0gAluminium Avg 863.0gControl 863.0gLinear (Control 863.0g)
% Efficiency
94.7 ± 2.3 %94.6 ± 2.3 %
95.1 ± 3.3 %
0 50 100
Glue ChannelsGlue Channels ControlblankCircles on HolesCircles on Holes ControlblankCircles OutCircles Out Control% Efficiency
Surface Structure with No Wind
92.3 ± 3.5 %94.3 ± 3.5 %90.4 ± 3.5 %93.8 ± 3.5 %92.1 ± 3.2 %91.4 ± 3.2 %
0 50 100
WavyWavy ControlblankCocktail SticksCocktail Sticks Control
% Efficiency
Surface Structure with No Wind
83.4 ± 2.5 %90.4 ± 2.5 %88.5 ± 2.5 %91.1 ± 2.5 %
0 50 100
Control Av-erageWavyCocktail SticksCircles on HolesCircles InCircles Out
% Efficiency
Surface Structure with Wind
46.1 ± 3.3 %52.5 ± 3.1 %52.5 ± 3.6 %50.2 ± 3.4 %44.5 ± 3.1 %50.3 ± 3.1 %
Conclusion
Reflective and absorbing wall covering – No significant difference
Surface Structure without wind – Opaque objects reduced efficiency
Surface Structure with wind – Improved performance for separated, curved structures
Improvements
Questions?