Transcript TECO Green Tech Contest 2012 Taipei Research on Refrigeration

TECO Green Tech Contest 2012 Taipei
Research on Refrigeration and
heating integrated solar photovoltaic
technology
Author: Han Rui (Reporter), Sun Fei, Jiang Chang-Bao
Advisor: Prof. Gao Jihui
School of Energy Science and Engineering
Harbin Institute of Technology
Date: 2012. 08. 28
TECO Green Tech Contest 2012 Taipei
1
Research background
Page 3-4
2
Invention ideas
Page 5-8
3
System introduction
Page 9-10
4
Experiment research
Page 11-13
5
Characteristics & innovations Page 14
Contents
TECO Green Tech Contest 2012 Taipei
Ⅰ Research background
Traditional energy problems
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.
Solar energy has great potential
biomass energy
fossil energy
The solar energy
cured by plants
Solar energy cured
in ancient times
wind energy
The subprime energy
of solar energy
wave energy
Solar energy belongs to low
The subprime energy density energy, comprehensive
utilization is a promising direction.
of solar energy
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TECO Green Tech Contest 2012 Taipei
Ⅰ Research background
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.
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TECO Green Tech Contest 2012 Taipei
Ⅱ Invention ideas
Solar building give us inspiration
The British low carbon hall of 2010 Shanghai world expo
The solar building reduces
the construction cost and
improves environmental
and economic benefits.
Passive
radiation
fermentation photovoltaic solar energy
ventilation
refrigeration
system
collection
system
system
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
Solar energy
Some material
Heat transfer
purpose?
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Ⅱ Invention ideas
TECO Green Tech Contest 2012 Taipei
The use of solar semiconductor refrigeration technology
Adjustment
convenient
No noise
Solar-energy semiconductor
Mode conversion
easily
No liquid,gas
medium
refrigeration matches to the
season well, namely if the
Role fastly, long
service life
weather is hot, the sun
Without space
limitation
radiation is better and the
Semiconductor refrigeration has significant advantages, it is
the ideal refrigeration way.
Solar energy
Electric energy
Photovoltaic
refrigerating capacity is great.
Heat transfer
Semiconductor
refrigeration
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.
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Ⅱ Invention ideas
TECO Green Tech Contest 2012 Taipei
The put forward of "cooling water heated gradient technology”
Solar energy
Electric energy
Photovoltaic
Heat transfer
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
Solar
energy
Solar
collector
Electric energy
Photovoltaic
High quality hot water
Heat transfer
Semiconductor
refrigeration
cooling water heated gradient technology
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.
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TECO Green Tech Contest 2012 Taipei
Ⅱ Invention ideas
The key principle to our project
---- three kinds of heat transfer
Heat radiation don't need power
supporting and temperature difference
Heat conduction make use
of temperature difference
heat convection
aquifer
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TECO Green Tech Contest 2012 Taipei
Ⅲ System introduction
System diagram
System diagram
the effect diagram
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TECO Green Tech Contest 2012 Taipei
Ⅲ System introduction
Water cycle diagram
water cycle route in summer
water cycle route in winter
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TECO Green Tech Contest 2012 Taipei
Ⅳ Experiment research
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 Page 11
Ⅳ Experiment research
TECO Green Tech Contest 2012 Taipei
Study on semiconductor refrigeration properties
 The influence of input current on refrigeration effect
5.0
Input power efficiency
Refrigerating capacity
50
4.0
COP
40
3.0
30
COP（ -）
Input power efficiency and
refrigerating capacity（ W）
60
2.0
20
10
1.0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
Current（ A）
 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.
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Ⅳ Experiment research
TECO Green Tech Contest 2012 Taipei
Study on semiconductor refrigeration properties-continue
 The influence of hot side cooling mode on refrigeration effect
75
75
55
50
45
65
输入电压：14.8V
60
55
50
45
20
40
60
80
100
时间（ min）
120
140
160
65
输入电压：14.8V
60
55
50
45
0
20
40
60
80
100
120
140
160
时间（ min）
0
20
40
60
80
100
120
140
160
时间（ min）
 The influence of cooling water temperature on refrigeration effect
30
1.3
1.3
Input power efficiency
Refrigerating capacity
28
Input power efficiency and
refrigerating capacity（ W）
0
 Through the comparison
of the two kinds of
cooling modes, water
cooling effect is much
better than air cooling
effect .
风冷
26
1.2
24
1.2
1.1
22
1.1
20
1.0
18
COP
1.0
16
15
20
25
30
35
Cooling water temperature（ C）
o
40
 The lower the cooling
water temperature is, the
better cooling effect is,
the greater refrigerating
capacity of semiconductor
thermopile is.
COP（ -）
60
30度水冷
15度水冷
70
被冷却水温度（ oC）
输入电压：14.8V
65
关闭制冷片
15度水冷
70
被冷却水温度（ oC）
被冷却水温度（ oC）
70
75
30度水冷
制冷片开启
制冷片关闭
0.9
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TECO Green Tech Contest 2012 Taipei Ⅴ Characteristics & innovations
1
The project integrate photovoltaic generation, semiconductor
refrigeration, solar energy collector based on the buildings.
It realizes the comprehensive utilization of solar energy.
2
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.
3
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.
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TECO Green Tech Contest 2012 Taipei
Patent acceptance notice
Honor certificates
Page 15
TECO Green Tech Contest 2012 Taipei
THANK YOU FOR YOUR
KIND ATTENTION！