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Publications (10 of 336) Show all publications
Yan, J. & Zhang, Z. (2019). Carbon Capture, Utilization and Storage (CCUS). Applied Energy, 235, 1289-1299
Open this publication in new window or tab >>Carbon Capture, Utilization and Storage (CCUS)
2019 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 235, p. 1289-1299Article in journal, Editorial material (Refereed) Published
Place, publisher, year, edition, pages
Elsevier Ltd, 2019
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-41438 (URN)10.1016/j.apenergy.2018.11.019 (DOI)000458942800104 ()2-s2.0-85056879138 (Scopus ID)
Available from: 2018-11-29 Created: 2018-11-29 Last updated: 2019-03-14Bibliographically approved
Zhang, H., Li, X., Liu, X. & Yan, J. (2019). Enhancing fuel cell durability for fuel cell plug-in hybrid electric vehicles through strategic power management. Applied Energy, 241, 483-490
Open this publication in new window or tab >>Enhancing fuel cell durability for fuel cell plug-in hybrid electric vehicles through strategic power management
2019 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 241, p. 483-490Article in journal (Refereed) Published
Abstract [en]

Fuel cell plug-in hybrid electric vehicles (FC-PHEVs) can have extended range while utilizing cheap grid electricity, but has poor durability of onboard fuel cells due to dynamic loading. In this study, fuel cell durability is enhanced significantly for a novel configuration of FC-PHEVs with three fuel cell stacks through strategic power management by making each fuel cell stack work only at a fixed operating point (i.e., constant output power) and by shortening its active time (operation) via on-off switching control. A hysteresis control strategy of power management is designed to make the active time evenly distributed over the three fuel cell stacks and to reduce the number of on-off switching. The results indicate that the durability of the onboard fuel cells can be increased 11.8, 4.8 and 6.9 times, respectively, for an urban, highway and a combined urban-highway driving cycle. This enhanced fuel cell durability is derived from the fact that the average power demand of real-time driving cycles is only a fraction of the maximum power that FC-PHEVs could provide, and substantially increased durability can be used to reduce the over-design, hence the cost, of fuel cells. 

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Fuel cell architecture, Optimal control, PEM fuel cell, Plug-in hybrid electric vehicles (PHEVs), Power split
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:mdh:diva-42941 (URN)10.1016/j.apenergy.2019.02.040 (DOI)000465509500037 ()2-s2.0-85062688030 (Scopus ID)
Available from: 2019-03-22 Created: 2019-03-22 Last updated: 2019-07-01Bibliographically approved
Mancuso, M. V., Campana, P. E. & Yan, J. (2019). Evaluation of Grid-Connected Micro-Grid Operational Strategies. In: : . Paper presented at 10th International Conference on Applied Energy (ICAE2018) (pp. 1273-1278). , 158
Open this publication in new window or tab >>Evaluation of Grid-Connected Micro-Grid Operational Strategies
2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This study investigates the operational performances of a grid-connected microgrid with integrated solar photovoltaic and battery energy storage. The study is based upon the techno-economic specifications and theoretical performance of the distributed energy resource and storage systems, as well as on measured consumer load data and electrical utility retail and distribution data for representative residential and commercial loads for the city of Västerås, Sweden. The open-source Matlab®-based simulation tool, OptiCE, is used for performing simulations and optimization. To support the attainment of one of the objectives, peak shaving of the consumer load, a battery operational strategy algorithm has been developed to balance peak shaving and PV self-consumption. Comparisons among three types of battery, lead-acid, lithium-ion and vanadium-redox flow, are also performed. A 117 kW p photovoltaic system paired with a lithium-ion battery of 41.1 kWh capacity is the optimal solution found for the considered commercial load. The calculated battery capacity represents the best trade-off for the set multi-objective optimization problem. The simulation of this system predicts the possibility to shave the customer load profile peaks up to 20% for the month of April. The corresponding self-consumption ratio is 88%. Differences in the relationship between the load profiles and the system performance have been qualitatively noted. Furthermore, the simulation results for lead-acid, lithium-ion and vanadium-redox flow battery systems reveal that lithium-ion batteries delivers the best trade-off between total annualized cost and peak shaving performance for both residential and commercial applications.

Series
Energy Procedia, ISSN 1876-6102
Keywords
Battery; Microgrid; Optimization; Peak shaving; Photovoltaic
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-41690 (URN)10.1016/j.egypro.2019.01.315 (DOI)000471031701099 ()2-s2.0-85063866890 (Scopus ID)
Conference
10th International Conference on Applied Energy (ICAE2018)
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2019-07-11Bibliographically approved
Niu, Z., Yu, J., Cui, X., Yang, X., Sun, Y. & Yan, J. (2019). Experimental investigations on the thermal energy storage performance of shell and tube unit with composite phase change materials. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China (pp. 4889-4896). Elsevier Ltd, 158
Open this publication in new window or tab >>Experimental investigations on the thermal energy storage performance of shell and tube unit with composite phase change materials
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2019 (English)In: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, p. 4889-4896Conference paper, Published paper (Refereed)
Abstract [en]

This work presented experimental investigations on the thermal energy storage performance of the shell and tube unit with composite phase change materials (PCM). A cylindrical heat storage tank filled with open-cell copper foam was proposed and its melting process characteristics were studied. A designed test system was established to record the PCM real-time temperature data. The results showed that, compared with traditional smooth-tube phase-change heat exchangers, the composite PCM unit accelerated the bottom paraffin melting. The temperature disparity among different height reduced, which resulted in better internal temperature uniformity. Due to the expanded heat transfer area, improved heat transfer coefficient and weakened natural convection, the bottom phase-change materials in the composite-PCM heat-storage unit melt faster. 

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Fined tube, Melting phase change, Metal foam, Thermal energy storage
National Category
Materials Engineering
Identifiers
urn:nbn:se:mdh:diva-43144 (URN)10.1016/j.egypro.2019.01.704 (DOI)000471031705039 ()2-s2.0-85063862517 (Scopus ID)
Conference
10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China
Available from: 2019-04-18 Created: 2019-04-18 Last updated: 2019-07-11Bibliographically approved
Salman, C. A., Schwede, S., Thorin, E., Li, H. & Yan, J. (2019). Identification of thermochemical pathways for the energy and nutrient recovery from digested sludge in wastewater treatment plants. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018 (pp. 1317-1322). Elsevier Ltd, 158
Open this publication in new window or tab >>Identification of thermochemical pathways for the energy and nutrient recovery from digested sludge in wastewater treatment plants
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2019 (English)In: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, p. 1317-1322Conference paper, Published paper (Refereed)
Abstract [en]

There are several restrictions and limitations on the emissions and disposal of materials and pollutants related to wastewater treatment plants (WWTPs) emphasizing improvement of current processes and development of new methods. Process integration is one way to use all fractions of waste for improved efficiency. WWTPs produces sludge which is usually anaerobically digested to produce biogas and a byproduct called digestate. Digestate is an organic material that contains macro and micronutrients such as nitrogen, phosphorous, and potassium and also contains heavy metals. Digestate is mainly used for agricultural applications because of the presence of nutrients. However, digestate also contains energy in the form of carbon and hydrogen which can be harnessed through various processes and integrated with nitrogen recovery process. This study aims to recover the energy and nutrients from digestate through thermochemical treatment processes. Combustion, pyrolysis, and gasification are assessed and compared in this work. An ammonia stripping method is assumed to recover nitrogen from digestate. The thermochemical processes are heat integrated with ammonia stripping through modeling and simulation. Results show that almost half of the energy present in digested sludge is required for its drying. Moreover, nitrogen recovery also requires much energy. The combustion and gasification of digested sludge give better results than pyrolysis. The heat integration becomes feasible when the auxiliary biogas is also burned along with products from the thermochemical treatment of sludge.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Combustion, Digestate, Gasification, Pyrolysis, Wastewater treatment, Ammonia, Anaerobic digestion, Biogas, Heavy metals, Nitrogen, Nutrients, Reclamation, Sewage pumping plants, Waste incineration, Wastewater disposal, Water treatment plants, Carbon and hydrogens, Macro-and micronutrients, Model and simulation, Process integration, Thermo chemical process, Thermochemical treatments, Wastewater treatment plants
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-43184 (URN)10.1016/j.egypro.2019.01.325 (DOI)000471031701105 ()2-s2.0-85063872188 (Scopus ID)
Conference
10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018
Available from: 2019-04-26 Created: 2019-04-26 Last updated: 2019-07-11Bibliographically approved
Tan, Y., Nookuea, W., Li, H., Thorin, E. & Yan, J. (2019). Impacts of thermos-physical properties on plate-fin multi-stream heat exchanger design in cryogenic process for CO2 capture. Applied Thermal Engineering, 149, 1445-1453
Open this publication in new window or tab >>Impacts of thermos-physical properties on plate-fin multi-stream heat exchanger design in cryogenic process for CO2 capture
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2019 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 149, p. 1445-1453Article in journal (Refereed) Published
Abstract [en]

Oxy-fuel combustion is one of the most promising technologies for CO2 capture for power plants. In oxy-fuel combustion plants, cryogenic process can be applied for CO2 purification because the main impurities in flue gas are non-condensable gases. The multi-stream plate-fin heat exchanger is one of the most important components in the CO2 cryogenic system. In-depth understanding of the impacts of property on the heat exchanger is of importance for appropriate design. In order to investigate the impacts of properties on sizing the heat exchanger and to further identify the key properties to be prioritized for the property model development, this paper presented the design procedure for the plate-fin multi-stream heat exchanger for the CO2 cryogenic process. Sensitivity study was conducted to analyze the impacts of thermos-physical properties including density, viscosity, heat capacity and thermal conductivity. The results show that thermal conductivity has the most significant impact and hence, developing a more accurate thermal conductivity model is more important for the heat exchanger design. In addition, even though viscosity has less significant impact compared to other properties, the larger deviation range of current viscosity models may lead to higher uncertainties in volume design and annual capital cost of heat exchanger. 

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
CO2 mixture, Cryogenic process, Heat exchanger, Sensitivity study, Thermos-physical property
National Category
Energy Systems Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-42343 (URN)10.1016/j.applthermaleng.2018.12.066 (DOI)000460492300127 ()2-s2.0-85059479126 (Scopus ID)
Available from: 2019-01-17 Created: 2019-01-17 Last updated: 2019-03-29Bibliographically approved
Yan, J., Yang, H., Li, H. & Chen, X. (2019). Innovative solutions for energy transitions: Proceedings of the 10th International Conference on Applied Energy (ICAE2018). Energy Procedia, 158, 1-2
Open this publication in new window or tab >>Innovative solutions for energy transitions: Proceedings of the 10th International Conference on Applied Energy (ICAE2018)
2019 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 158, p. 1-2Article in journal, Editorial material (Other academic) Published
Place, publisher, year, edition, pages
Elsevier Ltd, 2019
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:mdh:diva-43139 (URN)10.1016/j.egypro.2019.01.022 (DOI)2-s2.0-85063918913 (Scopus ID)
Available from: 2019-04-18 Created: 2019-04-18 Last updated: 2019-06-04Bibliographically approved
Yan, J., Lai, F., Liu, Y., Yu, D. C., Yi, W. & Yan, J. (2019). Multi-stage transport and logistic optimization for the mobilized and distributed battery. Energy Conversion and Management, 196, 261-276
Open this publication in new window or tab >>Multi-stage transport and logistic optimization for the mobilized and distributed battery
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2019 (English)In: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 196, p. 261-276Article in journal (Refereed) Published
Abstract [en]

High share of variable renewable energy is challenging to the traditional power system technically and economically. This calls for a significant increase to the system flexibility, which might result in the costs associated with energy storage and costly upgrades to the traditional transmission and distribution system. This paper presents a multi-stage battery transportation and logistics optimization method to increase the renewable energy consumptions, economics, and mobilities of the battery utilization. A new approach is proposed in which the batteries are charged in the renewable power plants and transported back and forth by railways between the renewable power plants and cities. Based on the forecasts of battery supplies/demands, multiple optimization stages (full train transport and carpooling) are designed by the branch-and-bound algorithm and genetic algorithm respectively. The proposed battery transportation and logistics concept and model are performed using the Beijing-Tianjin-Hebei region in China as an example. The results show that the levelized cost of energy of the battery transportation and logistics model is $0.045/kWh averagely. Also, by the use of mobilized batteries, the proposed battery transportation and logistics model increases the system flexibilities and renewable energy deliveries to the end users without the reinforcement of transmission and distribution system and any constraint from a highly penetrated power system.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Battery transportation, Distributed energy storage, Electric vehicle, Logistic optimization, Mobilized battery, Renewable energy
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-44659 (URN)10.1016/j.enconman.2019.06.001 (DOI)2-s2.0-85067083534 (Scopus ID)
Available from: 2019-06-27 Created: 2019-06-27 Last updated: 2019-06-27Bibliographically approved
Shang, N., Lin, Y., Ding, Y., Ye, C. & Yan, J. (2019). Nodal market power assessment of flexible demand resources. Applied Energy, 235, 564-577
Open this publication in new window or tab >>Nodal market power assessment of flexible demand resources
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2019 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 235, p. 564-577Article in journal (Refereed) Published
Abstract [en]

With the incorporation of higher shares of intermittent renewable energies (RES), more flexible resources are required in power systems to keep load balance. Under some extreme circumstances, the flexible demand resources (FDRs) may have the potential to dominate and obtain excess benefits, preventing other FDRs from participating in the electricity markets. Therefore, it is of great significance to identify the key FDR market power locations and implement some corresponding regulations. However, the relevant researches in power systems focused on the supply side, rather than the demand side. In this paper, a novel nodal market power analysis method is proposed to evaluate the potential influence of FDRs on electricity markets. Firstly, a multi-state model is established to present the multiple power system operation states including the random failures of system components. Then, the nodal market power assessment model is established under each specific state and new indices are proposed to evaluate the nodal market power of FDRs quantitatively. Furthermore, the key FDR nodes in demand side with stronger power in capturing excess revenue are identified. The 24-bus IEEE Reliability Test System is modified to demonstrate the feasibility of the proposed method. The numerical results of the proposed method are capable to display the existence of market power in demand side, and provide some valuable guidance for classification and operation of electricity markets.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-42423 (URN)10.1016/j.apenergy.2018.10.060 (DOI)000458942800047 ()2-s2.0-85056235812 (Scopus ID)
Available from: 2019-01-25 Created: 2019-01-25 Last updated: 2019-03-14Bibliographically approved
Liang, X., Tian, W., Li, R., Niu, Z., Yang, X., Meng, X., . . . Yan, J. (2019). Numerical investigations on outdoor thermal comfort for built environment: Case study of a Northwest campus in China. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018 (pp. 6557-6563). Elsevier Ltd, 158
Open this publication in new window or tab >>Numerical investigations on outdoor thermal comfort for built environment: Case study of a Northwest campus in China
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2019 (English)In: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, p. 6557-6563Conference paper, Published paper (Refereed)
Abstract [en]

Outdoor thermal comfort has been receiving more and more attentions due to the increased demand of outdoor activities during last decades. People require good thermal comfort when they are exposed to the outdoor thermal environment. However, the natural environment is severely suffering from the pollution of air, water as well as the extremely hot weather. Therefore, construction of ecological living environment is of great importance. To evaluate and improve the built environment, a campus area located in Northwest China was selected. Numerical simulations based on the software ENVI-met V4.0 were conducted and the effect of growing plants upon the outdoor thermal comfort was analyzed. Numerical results were compared using different thermal Indexes: Physiological Equivalent Temperature (PET) and Universal Thermal Climate Index (UTCI). Results demonstrated that UTCI gave a lower prediction than that of PET and was more suitable for evaluating the outdoor thermal comfort. Growing trees can significantly reduce the uncomfortable hours during hot summer but the improvement will reach the limitation after growing amount of trees.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
ENVI-met simulation, Greening, Outdoor thermal comfort, Universal thermal climate index (UTCI), Forestry, Water pollution, Climate index, ENVI-met, Natural environments, Numerical investigations, Outdoor thermal environment, Physiological equivalent temperatures, Thermal comfort
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-43190 (URN)10.1016/j.egypro.2019.01.077 (DOI)000471031706141 ()2-s2.0-85063873031 (Scopus ID)
Conference
10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018
Available from: 2019-04-25 Created: 2019-04-25 Last updated: 2019-07-11Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0300-0762

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