Home > Solution> Solar Photovoltaic Power Generation System> Solar PV Systems Energy Recovery

Solution
Hot Product

34 CO2 Emission Reduction Potential of Solar Power Generation System

Author: Source: Datetime: 2016-12-20 19:42:20
(2) According to the average power consumption of coal consumption estimates

According to China's electricity sector statistics, in 2005 the national power generation 24975, 2.6 billion kWh, more than 6000kW power plant power generation standard coal consumption 3438 / (kWh), power supply standard coal consumption 370g (kWh). The reason why the standard coal consumption of power supply is higher than the standard coal consumption of power generation is that at the end user, the power is lost due to the transmission through the power grid.

To calculate the standard coal consumption to calculate 370g (kWh) to calculate, if the carbon content of the power generation standard coal is 60%, equivalent to 1kWh of electricity per hair, to consume 0.222kg of carbon, into CO2

0.222 kg X 44/12 = 0.814 kg

Therefore, the CO2 emission index EI = 0.814 kg / (kWh), which is exactly the same as the previous results.

China's CO2 emission index is high, mainly due to the high proportion of coal burning in the power generation fuel structure. As can be seen from Table 2-11, in China's total power generation, coal-fired power stations account for nearly 80% The impact of great.


Table 2-11 Electricity production of various types of fuels in 2004 in some countries    Unit: 106 MWh

Electricity production of various types of fuels in 2004 in some countries

The potential for CO2 reduction in photovoltaic systems (PM) is defined as the amount of electricity delivered by a given unit power PV system to reduce GHG emissions, ie, a PV system with unit power (eg 1 kW) In the life cycle, the output of electricity is equivalent to reducing the amount of CO2 emissions, the unit is tCO2 / kW.

Clearly, the potential for CO2 emission reductions in addition to the CO2 emission index depends also on the local generation of PV systems. (kWh) per unit of power (1 kW) is multiplied by the CO2 emission index (tCO2 / kWh) of the PV system during its cycle, and the CO2 emission reduction potential of PV is obtained by combining formula (2-1) The formula is
PM = KP0YrNEI

Where  N            is the number of life cycles
            EI            CO2 Emissions Index

For the 28 major cities in China, the following two amendments are made in the light of the technical conditions of the IEA-PVPS Joint Report.

(1) Taking into account the photovoltaic system in the manufacturing process to consume energy, but also generate greenhouse gases, it should be deductible to pay the amount of time within the CO2 emissions. According to Table 2-4, according to the statistics of nine European and American PV manufacturing enterprises, for the 1kW grid-connected polysilicon photovoltaic system, the consumption of 2525kWh in the manufacturing process. Therefore, the potential of PV emission reduction formula is calculated

PM = (KP0Yr-2525) EI

(2) Analysis and calculation are made according to the installation of two kinds of grid-connected PV systems vertically to the equator at the best inclination angle and toward the equator. The overall efficiency of the system PR = 75% to calculate the photovoltaic system life cycle of 30 years, the results shown in Table 2-12

Table 2-12 CO2 emission reduction potential of grid-connected PV systems in some Chinese cities                                  Unit: tCO2 / kW

area

Best Inclination Installation

Vertical installation

area

Best Inclination Installation

Vertical installation

Haikou

23.96

11.84

Nanjing

20.52

11.86

Guangzhou

18.71

10.25

Xi'an

20.13

11.33

Kunming

27.52

15.98

Zhengzhou

23.89

16.34

Fuzhou

20.53

10.65

Lanzhou

25.21

14.99

Guiyang

15.68

7.79

Jinan

23.21

14.50

Changsha

20.51

11.47

Xining

28.42

18.17

Nanchang

18.46

10.50

Taiyuan

26.00

16.47

Chongqing

14.34

6.87

Yinchuan

32.03

20.90

Lhasa

37.15

22.64

Tianjin

25.18

16.32

Hangzhou

19.23

10.55

Beijing

25.24

17.10

Wuhan

18.98

10.34

Shenyang

25.24

17.10

Chengdu

14.35

7.22

Urumqi

26.08

16.55

Shanghai

22.02

12.50

Changchun

27.83

19.75

Hefei

20.30

11.55

Harbin

26.23

18.50



TAG: Fisker cobalt Eon CATL Ceramic Combinations KW 250 SCiB Batter Toshiba -Lithium Shared Show Pack