Energy Saving and Emission Reduction in Power Generation Sector for China’s Heat Pump Heating

2012 ◽  
Vol 608-609 ◽  
pp. 961-964
Author(s):  
Xia Chen ◽  
Li Wang ◽  
Li Ge Tong ◽  
Shu Feng Sun ◽  
Xian Fang Yue ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Heat Pump ◽  
Emission Reduction ◽  
Co2 Emission ◽  
Positive Impact ◽  
Current Trend ◽  
Northern China ◽  
Heat Pumps ◽  
The Impact

China is ranked as the world’s largest emitter of carbon dioxide (CO2). The CO2 emission from urban central heating (UCH) is responsible for 4.4% of China’s total CO2 emission. It is proposed that heat pump heating (HPH) could serve as a replacement for UCH to help realize energy-saving and emission-reduction goals to a greater extent. In northern China, 30% of urban building area is covered by urban decentralized heating (UDH). Replacing UDH with HPH is the current trend in China. In this paper we analyze the impact of replacing coal with heat pumps on the power generation sector in China. The results show that HPH has a positive impact on the power generation sector. By considering simultaneous replacement of UCH and UDH with HPH, the efficiency of power generation at the valley electricity time is increased by 0.512%; the ratio of peak–valley difference is decreased by 25.3%; the obtained reduction of CO2 emission cumulatively contributes to approximately 10.96% of this target.

scholarly journals Pulp and Paper Industry: Decarbonisation Technology Assessment to Reach CO2 Neutral Emissions—An Austrian Case Study

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1161
Author(s):  
Maedeh Rahnama Mobarakeh ◽  
Miguel Santos Silva ◽  
Thomas Kienberger
Keyword(s):  
Energy Consumption ◽  
Co2 Emissions ◽  
Emission Reduction ◽  
Co2 Emission ◽  
Manufacturing Industry ◽  
Paper Industry ◽  
Heat Pumps ◽  
Pulp And Paper ◽  
Low Carbon ◽  
Co2 Emission Reduction

The pulp and paper (P&P) sector is a dynamic manufacturing industry and plays an essential role in the Austrian economy. However, the sector, which consumes about 20 TWh of final energy, is responsible for 7% of Austria’s industrial CO2 emissions. This study, intending to assess the potential for improving energy efficiency and reducing emissions in the Austrian context in the P&P sector, uses a bottom-up approach model. The model is applied to analyze the energy consumption (heat and electricity) and CO2 emissions in the main processes, related to the P&P production from virgin or recycled fibers. Afterward, technological options to reduce energy consumption and fossil CO2 emissions for P&P production are investigated, and various low-carbon technologies are applied to the model. For each of the selected technologies, the potential of emission reduction and energy savings up to 2050 is estimated. Finally, a series of low-carbon technology-based scenarios are developed and evaluated. These scenarios’ content is based on the improvement potential associated with the various processes of different paper grades. The results reveal that the investigated technologies applied in the production process (chemical pulping and paper drying) have a minor impact on CO2 emission reduction (maximum 10% due to applying an impulse dryer). In contrast, steam supply electrification, by replacing fossil fuel boilers with direct heat supply (such as commercial electric boilers or heat pumps), enables reducing emissions by up to 75%. This means that the goal of 100% CO2 emission reduction by 2050 cannot be reached with one method alone. Consequently, a combination of technologies, particularly with the electrification of the steam supply, along with the use of carbon-free electricity generated by renewable energy, appears to be essential.

Study on Power Generation Expansion Planning Model Based on NOx Total Emission Control and Low Carbon Economy Effect

2013 ◽  
Vol 830 ◽  
pp. 439-443 ◽  
Author(s):  
Yu Li ◽  
Chao Ci Li
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Emission Reduction ◽  
Emission Control ◽  
Total Emission ◽  
Low Carbon ◽  
Low Carbon Economy ◽  
Generation Expansion ◽  
Total Emission Control ◽  
Carbon Economy

Acid rain and greenhouse effect are the major air pollution problems in China, and the goals for the total emission control of NOx and total energy consumption control begin to move forward in the 12th five-year plan. NOx emission reduction and energy saving of coal-fired power plants are still put in a strategic position. Accordingly, it is of great significance to carry out power planning work, considering effect of NOx emission index and energy saving on power industry. In this study, a mixed 0-1 integer linear power generation expansion model based on total emission control of NOx and low carbon economy effect is developed for the first time, which can be used for studying the change of power structure, confirming the releasing emissions of NOx from power system for development and reducing energy consumption by total amount control of power coal consumption and CO2 emission growth rate. The model is applied to the power system in Heilongjiang province and the results indicate that the proposed model not only can meet the requirement of power generation expansion management, but also can help the power industry clear the economic impact of NOx emission reduction on self-development and achieve the energy saving target.

scholarly journals Energy-Saving and CO2-Emissions-Reduction Potential of a Fuel Cell Cogeneration System for Condominiums Based on a Field Survey

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6611
Author(s):  
Kazui Yoshida ◽  
Hom B. Rijal ◽  
Kazuaki Bohgaki ◽  
Ayako Mikami ◽  
Hiroto Abe
Keyword(s):  
Power Generation ◽  
Energy Consumption ◽  
Fuel Cell ◽  
Energy Saving ◽  
Electric Power ◽  
Water Use ◽  
Co2 Emission ◽  
Contribution Rate ◽  
Electric Power Generation ◽  
Cogeneration System

A residential cogeneration system (CGS) is highlighted because of its efficient energy usage on both the supplier and consumer sides. It generates electricity and heat simultaneously; however, there is insufficient information on the efficiency according to the condition of usage. In this study, we analysed the performance data measured by the home energy management system (HEMS) and the lifestyle data of residents in a condominium of 356 flats where fuel cell CGS was installed in each flat. The electricity generated by CGS contributed to an approximately 12% reduction in primary energy consumption and CO2 emission, and the rate of generation by the CGS in the electric power demand (i.e., contribution rate) was approximately 38%. The electricity generation was mainly affected by the use of electricity up to 4 MWh/household/year. Gas or water use also impacted electric power generation, with water use as the primary factor affecting the contribution rate. Electric power generation changes monthly, mainly based on the water temperature. From these results, we confirmed that a CGS has substantial potential to reduce energy consumption and CO2 emission in condominiums. Thus, it is recommended for installation of fuel cell CGS in existing and new buildings to contribute to the energy-saving target of the Japanese Government in the residential sector.

The Integrated Evaluation Index of Energy-Saving and Emission Reduction Generation Dispatching

2011 ◽  
Vol 382 ◽  
pp. 56-59
Author(s):  
Yong Hua Li ◽  
Jun Wang ◽  
Wei Ping Yan
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Power Supply ◽  
Coal Combustion ◽  
Emission Reduction ◽  
Evaluation System ◽  
Power Plants ◽  
Consumption Rate ◽  
Coal Consumption ◽  
Reduction Effect

In China, coal combustion to generate electric power is the primary method, the energy-saving and emission reduction is the urgent task. At present, the energy-saving dispatching trial method in some area evaluates energy-saving and emission reduction of coal combustion power generation according to power supply coal consumption rate only. But the power supply coal consumption rate can’t reflect the energy-saving and emission reduction effect of coal combustion power plant overall. For example, the same coal combustion unit, the coal consumption rate is difference when desulfuration system is operating or not; the coal consumption rate of the unit with SCR will be increased; the coal consumption rate of the air-cooled unit is higher than water-cooled unit; etc.. This paper considers synthetically coal consumption rate, pollution emission, water resource wastage, etc., establishes a integrated evaluation system, adopts factor analysis method, gets the integrated evaluation system and index of energy-saving and emission reduction of coal combustion power generation, evaluates energy-saving and emission reduction effect of 5 power plants reasonable. The results show that the index can reflect the energy-saving and emission reduction level of coal combustion power generation.

Vincoli europei e internazionali. Il rilancio della politica climatica dell'Unione Europea per il periodo post Kyoto

2009 ◽  
pp. 149-161
Author(s):  
Andrea Molocchi
Keyword(s):  
Energy Saving ◽  
Emission Reduction ◽  
Burden Sharing ◽  
Gdp Per Capita ◽  
Carbon Intensity ◽  
Renewable Sources ◽  
Legislative Proposals ◽  
Per Capita ◽  
The Impact ◽  
The Eu

- The relation describes the European strategy on energy and climate under the UNFCCC process for the post Kyoto period (after 2012), by which on march 2007 the EU Council adopted general targets at 2020 for a 20%/30% emission reduction, 20% renewables and 20% energy saving. Furthermore it highlights the main features of the legislative proposals published by the European Commission (EC) to implement the strategy on the 23rd January 2008, soon after the Bali COP13 (so called "energy and climate package"). The package contains proposals to implement the 20% emission reduction through EU level defined caps in the ETS sectors and by national targets differentiation in the non-ETS sectors (respectively under the "ETS revision directive" and "Effort Sharing Decision") and a further directive proposal to implement the 20% target for renewables through national target differentiation as well. The burden sharing criteria applied by EC in the energy package proposals are based on GDP per capita and they do not consider any environmental efficiency criteria, such as carbon intensity or potential for renewable sources based on land availability. As the Impact Assessment produced by the Commission itself shows, the way the "solidariety criteria" has been applied produced estimated costs on GDP highly differentiated between Member States and non-coherent with the GDP per capita distribution. Nevertheless, these burden sharings have not been timely corrected by the EC to bring optimisation with GDP per capita rankings in the UE. In addition, the EC package does not contain legislative proposals aimed to implement the 20% energy saving target. Recent disclosure of information by EC consultants (NTUA - Primes Model) shows that the implicit energy saving potential of the proposed package is limited to 7%, thus far away from the announced 20%. Due to these lackings, the EC package and related burden sharings may not be considered coherent to the EU Council spring 2007 mandate. European Parliament or Council emendments aimed at a higher efficiency and fairness for the whole package are deemed necessary by the author, even if politically difficult to be introduced.Key words: Energy & climate package, GHGs, energy efficiency, renewable sources, European policy.

scholarly journals A Study on the Performance of a Cascade Heat Pump for Generating Hot Water

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4313 ◽  
Author(s):  
Boahen ◽  
Choi
Keyword(s):  
Heat Exchanger ◽  
Energy Saving ◽  
Heat Pump ◽  
Heat Pumps ◽  
Hot Water ◽  
Research Interest ◽  
Coefficient Of Performance ◽  
Energy Saving Potential ◽  
Heating Capacity

The use of cascade heat pumps for hot water generation has gained much attention in recent times. The big question that has attracted much research interest is how to enhance the performance and energy saving potential of these cascade heat pumps. This study therefore proposed a new cycle to enhance performance of the cascade heat pump by adopting an auxiliary heat exchanger (AHX) in desuperheater, heater and parallel positions at the low stage (LS) side. The new cascade cycle with AHX in desuperheater position was found to have better performance than that with AHX at heater and parallel positions. Compared to the conventional cycle, heating capacity and coefficient of performance (COP) of the new cascade cycle with AHX in desuperheater position increased up to 7.4% and 14.9% respectively.

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