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Feng, J.-C. -., Yan, J., Yu, Z., Zeng, X. & Xu, W. (2018). Case study of an industrial park toward zero carbon emission. Applied Energy, 209, 65-78
Open this publication in new window or tab >>Case study of an industrial park toward zero carbon emission
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 209, p. 65-78Article in journal (Refereed) Published
Abstract [en]

Industrial park shoulders heavy responsibilities for economic development, and in the meantime, acts the role as energy consumer and carbon emitter. Under the background of holding the average global temperature increase limited in 2 °C compared to the pre-industrial level, which was proposed in the Paris Agreement, the development of zero carbon emission at the industrial park level is of great importance. This study investigated how to realize zero carbon emission at an industrial park level. In addition, a practical case study of the Southern China Traditional Chinese Medicine Industrial Park located in the Zhongshan City, Guangdong Province of China was conducted. Scenario analyses were projected to realize zero carbon emission in this industrial park and the results show that zero carbon emission can be realized under all the three scenarios. Economic assessments found that purchasing carbon offsets get the minimum cost effectiveness under current market situation. However, purchasing carbon offset may not be the best choice from the aspect of absolute reduction. Sensitivity analyses illustrate that the cost effectiveness of carbon reduction is remarkably influenced by the carbon price and solar energy cost reduction ratio. Meanwhile, applying large-scale renewable energy and producing more carbon offset can harvest more economic and carbon reduction benefits when the current solar energy cost has been reduced by 90%. Moreover, challenges of building zero-carbon industrial park as well as the corresponding solution schemes were discussed.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
Keywords
Economic assessment, Industrial park, Renewable energy, Scenario analysis, Zero carbon emission
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-37231 (URN)10.1016/j.apenergy.2017.10.069 (DOI)000418968500007 ()2-s2.0-85032442093 (Scopus ID)
Available from: 2017-11-09 Created: 2017-11-09 Last updated: 2018-01-23Bibliographically approved
Lv, Y., Si, P., Rong, X., Yan, J., Feng, Y. & Zhu, X. (2018). Determination of optimum tilt angle and orientation for solar collectors based on effective solar heat collection. Applied Energy, 219, 11-19
Open this publication in new window or tab >>Determination of optimum tilt angle and orientation for solar collectors based on effective solar heat collection
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 219, p. 11-19Article in journal (Refereed) Published
Abstract [en]

Determination of optimum tilt angle and orientation of solar collectors by maximizing the total solar radiation may overestimate the energy production benefits, because a considerable amount of solar radiation is ineffective for practical solar collectors. In this paper, the concept of effective solar heat collection is proposed to rule out the ineffective solar radiation that could not be converted to available energy. Accordingly, an optimized mathematical model is developed and used to determine the optimum tilt angle and orientation of solar collectors installed in Lhasa during the heating season. Compared with the total solar radiation based optimum results, there is a deviation of 5° in the optimum orientations based on the effective solar heat collection. The case study shows that it is not advisable to adjust the optimum tilt angle on a monthly basis because there is no significance change in total solar energy gains in comparison with the case of no such adjustment during the heating season. In addition, the correction factors to achieving the maximum effective solar heat collection are given at different tilt angles and orientations to guide installation of solar collectors in practical engineering applications.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-38911 (URN)10.1016/j.apenergy.2018.03.014 (DOI)000430519200002 ()2-s2.0-85044100516 (Scopus ID)
Available from: 2018-04-05 Created: 2018-04-05 Last updated: 2018-05-11Bibliographically approved
Wang, C., Yan, J., Marnay, C., Djilali, N., Dahlquist, E., Wu, J. & Jia, H. (2018). Distributed Energy and Microgrids (DEM). Applied Energy, 210, 685-689
Open this publication in new window or tab >>Distributed Energy and Microgrids (DEM)
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 210, p. 685-689Article in journal, Editorial material (Refereed) Published
Place, publisher, year, edition, pages
Elsevier Ltd, 2018
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-37598 (URN)10.1016/j.apenergy.2017.11.059 (DOI)000419813100054 ()2-s2.0-85038265408 (Scopus ID)
Available from: 2017-12-28 Created: 2017-12-28 Last updated: 2018-01-26Bibliographically approved
Ding, Y., Shao, C., Yan, J., Song, Y., Zhang, C. & Guo, C. (2018). Economical flexibility options for integrating fluctuating wind energy in power systems: The case of China. Applied Energy, 228, 426-436
Open this publication in new window or tab >>Economical flexibility options for integrating fluctuating wind energy in power systems: The case of China
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 228, p. 426-436Article in journal (Refereed) Published
Abstract [en]

The inherent stochastic nature of wind power requires additional flexibility during power system operation. Traditionally, conventional generation is the only option to provide the required flexibility. However, the provision of the flexibility from the conventional generation such as coal-fired generating units comes at the cost of significantly additional fuel consumption and carbon emissions. Fortunately, with the development of the technologies, energy storage and customer demand response would be able to compete with the conventional generation in providing the flexibility. Give that power systems should deploy the most economic resources for provision of the required operational flexibility, this paper presents a detailed analysis of the economic characteristics of these key flexibility options. The concept of “balancing cost” is proposed to represent the cost of utilizing the flexible resources to integrate the variable wind power. The key indicators are proposed respectively for the different flexible resources to measure the balancing cost. Moreover, the optimization models are developed to evaluate the indicators to find out the balancing costs when utilizing different flexible resources. The results illustrate that exploiting the potential of flexibility from demand side management is the preferred option for integrating variable wind power when the penetration level is below 10%, preventing additional fuel consumption and carbon emissions. However, it may require 8% of the customer demand to be flexible and available. Moreover, although energy storage is currently relatively expensive, it is likely to prevail over conventional generation by 2025 to 2030, when the capital cost of energy storage is projected to drop to approximately $ 400/kWh or lower.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
Keywords
Balancing cost, Economical, Flexibility options, Wind power
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-40230 (URN)10.1016/j.apenergy.2018.06.066 (DOI)2-s2.0-85049089570 (Scopus ID)
Available from: 2018-07-12 Created: 2018-07-12 Last updated: 2018-07-12
Zhang, Y., Campana, P. E., Yang, Y., Stridh, B., Lundblad, A. & Yan, J. (2018). Energy flexibility from the consumer: Integrating local electricity and heat supplies in a building. Applied Energy, 223, 430-442
Open this publication in new window or tab >>Energy flexibility from the consumer: Integrating local electricity and heat supplies in a building
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 223, p. 430-442Article in journal (Refereed) Published
Abstract [en]

The increasing penetration level of renewable energy requires more flexibility measures to be implemented in future energy systems. Integrating an energy consumer’s local energy supplies connects multiple energy networks (i.e., the electrical grid, the district heating network, and gas network) in a decentralized way. Such integration enhances the flexibility of energy systems. In this work, a Swedish office building is investigated as a case study. Different components, including heat pump, electrical heater, battery and hot water storage tank are integrated into the electricity and heat supply system of the building. Special focus is placed on the flexibility that the studied building can provide to the electrical grid (i.e., the building modulates the electricity consumption in response to the grid operator’s requirements). The flexibility is described by two metrics including the flexibility hours and the flexibility energy. Optimization of the component capacities and the operation profiles is carried out by using Mixed Integer Linear Programming (MILP). The results show that the system fully relies on electricity for the heat demand when not considering the flexibility requirements of the electrical grid. This suggests that district heating is economically unfavorable compared with using electricity for the heat demand in the studied case. However, when flexibility requirements are added, the system turns to the district heating network for part of the heat demand. The system provides great flexibility to the electrical grid through such integration. The flexibility hours can be over 5200 h in a year, and the flexibility energy reaches more than 15.7 MWh (36% of the yearly electricity consumption). The yearly operation cost of the system slightly increases from 62,273 to 65,178 SEK when the flexibility hours increase from 304 to 5209 h. The results revealed that flexibility can be provided from the district heating network to the electrical grid via the building.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-39298 (URN)10.1016/j.apenergy.2018.04.041 (DOI)000433649900030 ()2-s2.0-85046664444 (Scopus ID)
Available from: 2018-05-24 Created: 2018-05-24 Last updated: 2018-06-28Bibliographically approved
Salman, C. A., Naqvi, M., Thorin, E. & Yan, J. (2018). Gasification process integration with existing combined heat and power plants for polygeneration of dimethyl ether or methanol: A detailed profitability analysis. Applied Energy, 226, 116-128
Open this publication in new window or tab >>Gasification process integration with existing combined heat and power plants for polygeneration of dimethyl ether or methanol: A detailed profitability analysis
2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 226, p. 116-128Article in journal (Refereed) Published
Abstract [en]

Combustion of waste for cogeneration of heat and power is the most convenient and practical choice to carry out through combined heat and power (CHP) plants. But, seasonal variation in heat demand throughout the year affects the operation of CHP plants. This fluctuation in the CHP operation cause less annual operating hours for the plant equipment and is also not profitable for stakeholders. This study aims to assess the technical potential of integrated gasification process with existing CHP plants for either dimethyl ether (DME) or methanol production through refuse-derived fuel (RDF). Process integration considers that the CHP plant provides the necessary heat for biofuel synthesis during off-peak hours. Mass and heat integration methods are used to develop and simulate the polygeneration processes for heat, power, and biofuel production. Both technical and economic indicators are reported and compared to assess the potential for both biofuels through process integration. Annual operation data of a real CHP plant has been extracted to evaluate the integrated processes. A flexible gasification configuration is selected for the integrated approach i.e. CHP runs at full load to provide the heat demand and only the excess heat of CHP plant is utilized for biofuel production. The energetic efficiencies of the polygeneration systems are compared with the standalone systems. Technical analysis of process integration shows the enhancement of the operational capacity of CHP during off-peak hours and it can produce biofuels without compromising the annual heat demand. Production of methanol through process integration shows ∼67% energetic efficiency while methanol production gives ∼65%. The efficiencies are higher than standalone DME and methanol processes (51% and 53%, respectively) but lower than standalone CHP plant i.e. 81%, however the process integration increases the operating time of the CHP plant with more economic benefits. Economic analysis coupled with uncertainty analysis through Monte Carlo simulations shows that by integrating CHP with gasifier to produce biofuels is significantly profitable as compared with only heat and electricity production. But, DME as a potential product shows more economic benefits than methanol. The uncertainty analysis through Monte Carlo simulations shows that the profitable probability of DME as a product in future is also greater than methanol due to higher DME selling price. The uncertainty analysis further shows that prices of DME and methanol with waste biomass prices in future will have a greater impact on the economic performance of the proposed polygeneration process. 

National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-39632 (URN)10.1016/j.apenergy.2018.05.069 (DOI)2-s2.0-85047756868 (Scopus ID)
Available from: 2018-06-07 Created: 2018-06-07 Last updated: 2018-06-07Bibliographically approved
Liu, J., Mao, G., Hoekstra, A., Wang, D., Wang, J., Zheng, C., . . . Yan, J. (2018). Managing the energy-water-food nexus for sustainable development. Applied Energy, 210, 377-381
Open this publication in new window or tab >>Managing the energy-water-food nexus for sustainable development
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 210, p. 377-381Article in journal, Editorial material (Refereed) Published
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-37622 (URN)10.1016/j.apenergy.2017.10.064 (DOI)000419813100029 ()2-s2.0-85038867068 (Scopus ID)
Available from: 2018-01-05 Created: 2018-01-05 Last updated: 2018-01-26Bibliographically approved
Ding, J., Du, L., Pan, G., Lu, J., Wei, X., Li, J., . . . Yan, J. (2018). Molecular dynamics simulations of the local structures and thermodynamic properties on molten alkali carbonate K2CO3. Applied Energy, 220, 536-544
Open this publication in new window or tab >>Molecular dynamics simulations of the local structures and thermodynamic properties on molten alkali carbonate K2CO3
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 220, p. 536-544Article in journal (Refereed) Published
Abstract [en]

Molten carbonate salts have received particular attention for high-temperature thermal energy storage and heat Molecular dynamics simulation transfer applications due to desirable thermal characteristics, such as wide operating temperature range, low Molten alkali carbonates causticity and excellent thermal stability. In this study, molecular dynamics (MD) simulations were performed Local structures on molten alkali carbonate K2CO3 based on an effective pair potential model, a Born-Mayer type combined with Thermodynamic properties a Coulomb term. The radial distribution functions (RDF) and coordination number curves of the molten salt were characterized to explore the temperature dependences of macroscopic properties from microscopic view. The results suggest that the distance between K2CO3 particles is getting larger with temperature increasing, resulting in the increase of molar volume and the diminished ability of resistance to shear deformation and heat transfer by vibration between ions. Besides, it can be concluded that the structure of CO32- is inferred reasonably to be ortho-triangular pyramid from the comprehensive analysis of local structures including the angular distribution functions (ADF). Moreover, the thermodynamic properties were simulated in detail from 1200 to 1600 K including the density, thermal expansion coefficient, specific heat capacity, sheer viscosity, thermal conductivity and ion self-diffusion coefficient, which was hard to be measured from experiments under high-temperature extreme conditions, All the simulation results are in satisfactory agreement with available experimental data with high accuracy, and the minimum simulation error is as low as 1.42%.

National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-39636 (URN)10.1016/j.apenergy.2018.03.116 (DOI)000432884500042 ()
Available from: 2018-06-07 Created: 2018-06-07 Last updated: 2018-06-07Bibliographically approved
Yan, J. (2018). Negative-emissions hydrogen energy. Nature Climate Change, 8(7), 560-561
Open this publication in new window or tab >>Negative-emissions hydrogen energy
2018 (English)In: Nature Climate Change, ISSN 1758-678X, Vol. 8, no 7, p. 560-561Article in journal (Refereed) Published
Abstract [en]

The race against time to mitigate climate change has increasingly focused on the development and deployment of bioenergy with carbon capture and storage. New research shows that negative-emissions hydrogen production is potentially a cost-effective alternative.

Place, publisher, year, edition, pages
Nature Publishing Group, 2018
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-40236 (URN)10.1038/s41558-018-0215-9 (DOI)2-s2.0-85049030567 (Scopus ID)
Available from: 2018-07-12 Created: 2018-07-12 Last updated: 2018-07-12Bibliographically approved
Naqvi, M., Dahlquist, E., Yan, J., Naqvi, S. R., Nizami, A. S., Salman, C. A., . . . Qureshi, A. S. (2018). Polygeneration system integrated with small non-wood pulp mills for substitute natural gas production. Applied Energy, 224, 636-646
Open this publication in new window or tab >>Polygeneration system integrated with small non-wood pulp mills for substitute natural gas production
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 224, p. 636-646Article in journal (Refereed) Published
Abstract [en]

This study aims to examine the potential substitute natural gas (SNG) production by integrating black liquor gasification (BLG) island with a small wheat straw-based non-wood pulp mills (NPM), which do not employ the black liquor recovery cycle. For such integration, it is important to first build knowledge on expected improvements in an overall integrated non-wood pulp mill energy system using the key performance indicators. O2-blown circulating fluidized bed (CFB) gasification with direct causticization is integrated with a reference small NPM to evaluate the overall performance. A detailed economic analysis is performed together with a sensitivity analysis based on variations in the rate of return due to varying biomass price, total capital investment, and natural gas prices. The quantitive results showed considerable SNG production but significantly reduced electricity production. There is a substantial CO2 abatement potential combining CO2 capture and CO2 mitigation from SNG use replacing compressed natural gas (CNG) or gasoline. The economic performance through sensitivity analysis reflects significant dependency on both substitute natural gas production and natural gas market price. Furthermore, the solutions to address the challenges and barriers for the successful commercial implementation of BLG based polygeneration system at small NPMs are discussed. The system performance and discussion on the real application of integrated system presented in this article form a vital literature source for future use by large number of small non-wood pulp industries.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-39297 (URN)10.1016/j.apenergy.2018.05.005 (DOI)2-s2.0-85046790342 (Scopus ID)
Available from: 2018-05-24 Created: 2018-05-24 Last updated: 2018-05-24Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-0300-0762

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