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TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei
Research on Refrigeration and heating integrated solar photovoltaic
technology
Author: Han Rui (Reporter), Sun Fei, Jiang Chang-BaoAdvisor: Prof. Gao Jihui
School of Energy Science and EngineeringSchool of Energy Science and EngineeringHarbin Institute of TechnologyHarbin Institute of TechnologySchool of Energy Science and EngineeringSchool of Energy Science and EngineeringHarbin Institute of TechnologyHarbin Institute of Technology
Date: 2012. 08. 28Date: 2012. 08. 28Date: 2012. 08. 28Date: 2012. 08. 28
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei ContentsContents
Research background1
2
3
4
5
Invention ideas
System introduction
Experiment research
Characteristics & innovations
Page 5-8
Page 3-4
Page 9-10
Page 11-13
Page 14
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅰ Ⅰ ResearchResearch backgroundbackground
fossil energy
Fossil energy pollute the environmental seriously; the reserves is reduced and the price is higher and higher ;Many wars were triggered because of the fossil energy.
Traditional energy problems
Solar energy has great potential
Solar energy belongs to low density energy, comprehensive utilization is a promising direction.
wind energy
The subprime energy of solar energy
biomass energy
The solar energy cured by plants
wave energy
fossil energy
Solar energy cured in ancient times
The subprime energy of solar energy
Page 3Page 3
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei ⅠⅠ ResearchResearch background background
Page 4Page 4
Air-conditioning consume power greatly and pollute the environment
Air-conditioning sales volume distribution Power shortage region distribution
From the picture we can see that the more the air conditioning is, the more serious the power shortage is. Statistics shows that heating, cooling and hot water supply together account for more than 70% of the household energy consumption.
The vast majority air conditioning use
refrigerants such as Freon, The wide
use of refrigerant have serious
negative effect on the ecological
environment; the conventional air
conditioning usually need pump, it
also will produce noise pollution.
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅱ Ⅱ Invention ideasInvention ideas
Solar building give us inspiration
radiation refrigeration
Passive ventilation
system
fermentation system
photovoltaic system
solar energy collection
The solar building reduces
the construction cost and
improves environmental
and economic benefits.
The solar building reduces
the construction cost and
improves environmental
and economic benefits.
The British low carbon hall of 2010 Shanghai world expo
We hope to find a kind of
material, on the radiation of
sunshine, the material generates
the effect of refrigeration. But it is
too difficult, the idea was not
fulfilled. So we think ,if we could
add some intermediate steps to
achieve our purpose?
We hope to find a kind of
material, on the radiation of
sunshine, the material generates
the effect of refrigeration. But it is
too difficult, the idea was not
fulfilled. So we think ,if we could
add some intermediate steps to
achieve our purpose?Solar energy Some material Heat transfer Page 5Page 5
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅱ Ⅱ Invention ideasInvention ideas
No noise
No liquid,gas medium
Without space limitation
Adjustment convenient
Role fastly, long service life
Mode conversion easily
Semiconductor refrigeration has significant advantages, it is
the ideal refrigeration way.Semiconductor refrigeration has significant advantages, it is
the ideal refrigeration way.
To the end of 21st century, the solar
power will account for more than
60% of the total power, photovoltaic
power generation has the broad
development prospect.
To the end of 21st century, the solar
power will account for more than
60% of the total power, photovoltaic
power generation has the broad
development prospect.
Solar energy Electric energy Heat transfer
Photovoltaic Semiconductor refrigeration
Solar-energy semiconductor
refrigeration matches to the
season well, namely if the
weather is hot, the sun
radiation is better and the
refrigerating capacity is great.
The use of solar semiconductor refrigeration technology
Page 6Page 6
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅱ Ⅱ Invention ideasInvention ideas
The put forward of "cooling water heated gradient technology”
Solar energy Electric energy Heat transfer
Photovoltaic Semiconductor refrigeration
Solar cell and semiconductor refrigeration will produce a lot of heat when they are working, one
side the heat will influence the performance of equipment, on the other hand the heat will lost to
the environment and cause energy waste.
Solar energy Electric energy Heat transfer
Photovoltaic Semiconductor refrigeration
High quality hot waterSolar
collector
On the one hand improve the work performance of photovoltaic cell and semiconductor
thermopile , on the other hand absorb quantity of heat, acquire the high quality of hot water.
Solar energy
Page 7Page 7
cooling water heated gradient technology
Heat conduction make use of temperature difference
heat convection
aquifer
Heat radiation don't need power supporting and temperature difference
Page 8Page 8
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅱ Ⅱ Invention ideasInvention ideas
The key principle to our project ---- three kinds of heat transfer
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅲ Ⅲ System introductionSystem introduction
System diagram
System diagram the effect diagram
Page 9Page 9
water cycle route in summer water cycle route in winter
Page 10Page 10
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅲ Ⅲ System introductionSystem introduction
Water cycle diagram
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅳ Ⅳ Experiment research Experiment research
Page 11Page 11
In order to verify the feasibility of the key technology which we proposed and obtain relevant technical parameters, we carried out theoretical calculation and experiment research.
Experiment system
Semiconductor cooling experiment system Experiment debugging
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei
Page 12Page 12
Study on semiconductor refrigeration properties
The influence of input current on refrigeration effect
The heat of hot side conducts to cold side through semiconductor thermopile which makes refrigerating capacity and COP decline;
It can be concluded that the best input current of semiconductor thermopile is 2.8 A , corresponding input power is 30 W.
Ⅳ Ⅳ Experiment research Experiment research
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei
Study on semiconductor refrigeration properties-continue
The influence of hot side cooling mode on refrigeration effect
Through the comparison of the two kinds of cooling modes, water cooling effect is much better than air cooling effect .
0 20 40 60 80 100 120 140 160
45
50
55
60
65
70
75
被冷
却水
温度
(o C
)
时间 min( )
制冷片开启 制冷片关闭
输入电压:14.8V
0 20 40 60 80 100 120 140 160
45
50
55
60
65
70
75
被冷
却水
温度
(o C
)
时间 min( )
30度水冷 关闭制冷片 15度水冷
输入电压: 14.8V
0 20 40 60 80 100 120 140 160
45
50
55
60
65
70
75
被冷
却水
温度
(o C
)
时间 min( )
30度水冷 15度水冷 风冷
输入电压: 14.8V
The lower the cooling water temperature is, the better cooling effect is, the greater refrigerating capacity of semiconductor thermopile is.
The influence of cooling water temperature on refrigeration effect
Ⅳ Ⅳ Experiment research Experiment research
Page 13Page 13
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei Ⅴ Ⅴ Characteristics & innovations
Page 14Page 14
The project integrate photovoltaic generation, semiconductor refrigeration, solar energy collector based on the buildings. It realizes the comprehensive utilization of solar energy.
1
Achieve two major technology targets: reducing the temperature difference of hot side and cold side to improve the efficiency of refrigeration (COP) and reducing the photovoltaic cells working temperature to improve the power efficiency of photovoltaic cells . And put forward the scheme of using groundwater to store heat and cool, which can realize the heat stored underground.
2
The project is the first to propose “cooling water heated gradient technology”, which cooling water is heated from 15℃to 30 ℃ through semiconductor air conditioning , and then transports into the photovoltaic cells working surface heated to 50℃, and finally transport into solar collector heated to 70 ℃ or higher, so it can provide high quality hot water.
3
Patent acceptance notice
Page 15Page 15
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei
Honor certificates
TECO Green Tech ContestTECO Green Tech Contest 20122012 Taipei
THANK YOU FOR YOUR KIND ATTENTION!