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Publikasjoner (10 av 110) Visa alla publikasjoner
Wang, L., Liang, Z., Cai, M., Zhang, Y. & Yan, J. (2019). Adaptive structural control of floating wind turbine with application of MR damper. In: Innovative Solutions for Energy Transitions: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018 (pp. 254-259). Elsevier, 158
Åpne denne publikasjonen i ny fane eller vindu >>Adaptive structural control of floating wind turbine with application of MR damper
Vise andre…
2019 (engelsk)Inngår i: Innovative Solutions for Energy Transitions, Elsevier, 2019, Vol. 158, s. 254-259Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Floating wind turbine has become the most promising technology for deep-sea wind power generation. Therefore, some means to reduce the structural load for stabilizing the wind turbine has been developing. In this paper, a semi-active structural control is realized by replacing the damper in passive TMD with the magnetorheological (MR) damper. The damping force of the MR damper can be changed by altering the voltage applied to it. A simple and convenient control method is designed, which includes adaptive control force design and retrogression controller. The simulation results show that the semi-active control method has a good damping effect, which mitigates much of the structural load with respect to the passive structural control.

sted, utgiver, år, opplag, sider
Elsevier, 2019
Serie
Energy Procedia, ISSN 1876-6102 ; 158
Emneord
Floating wind turbine, Magnetorheological damper, Structural control
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251842 (URN)10.1016/j.egypro.2019.01.085 (DOI)000471031700042 ()2-s2.0-85063890294 (Scopus ID)
Konferanse
10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018
Merknad

QC 20190524

Tilgjengelig fra: 2019-05-24 Laget: 2019-05-24 Sist oppdatert: 2019-07-29bibliografisk kontrollert
Yan, J. & Zhang, Z. (2019). Carbon Capture, Utilization and Storage (CCUS). Applied Energy, 235, 1289-1299
Åpne denne publikasjonen i ny fane eller vindu >>Carbon Capture, Utilization and Storage (CCUS)
2019 (engelsk)Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 235, s. 1289-1299Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
ELSEVIER SCI LTD, 2019
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-246281 (URN)10.1016/j.apenergy.2018.11.019 (DOI)000458942800104 ()2-s2.0-85056879138 (Scopus ID)
Merknad

QC 20190325

Tilgjengelig fra: 2019-03-25 Laget: 2019-03-25 Sist oppdatert: 2019-04-04bibliografisk kontrollert
Barbarelli, S., Castiglione, T., Zupone, G. L., Bova, S. & Yan, J. (2019). CFD Investigation of the Open Center on the Performance of a Tidal Current Turbine. In: Renewable Energy Integration with Mini/Microgrid: . Paper presented at 2018 Renewable Energy Integration with Mini/Microgrid, REM 2018; Rhodes; Greece; 28 September 2018 through 30 September 2018 (pp. 28-33). Elsevier, 159
Åpne denne publikasjonen i ny fane eller vindu >>CFD Investigation of the Open Center on the Performance of a Tidal Current Turbine
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2019 (engelsk)Inngår i: Renewable Energy Integration with Mini/Microgrid, Elsevier, 2019, Vol. 159, s. 28-33Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In the present paper, a revision of the layout of an innovative open center self-balancing tidal turbine is presented. Initially, the design was characterized by a central deflector, responsible for the machine equilibrium, hosted in the central part of the machine; the presence of this device, however, affected the size of the opening. Moreover, the turbine was conceived as connected to a steel rope subject to tensile stress. These peculiarities brought some critical issues due to the excessive length of the rope and to the size of the deflector, which constrained the diameters ratio. The new design involves the possibility of reducing the anchoring line length by substituting the rope with a series of tubular elements connected by alternate heavy and light nodes. The heavy nodes can gather the anchoring line when the tides stops acting. Moreover, the light nodes are floating deflectors, which develop the same action of the central deflector, whose size, in this configuration, does not affect the equilibrium. In the new machine configuration, the main deflector is located out of the center so that it can counterbalance the torque exerted by the rotor during its rotation. Finally, by means of CFD simulations, some criteria for assessing the best diameter ratio are defined.

sted, utgiver, år, opplag, sider
Elsevier, 2019
Serie
Energy Procedia, ISSN 1876-6102 ; 159
Emneord
CFD analysis, marine turbine, power coefficient, tidal current
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251896 (URN)10.1016/j.egypro.2018.12.013 (DOI)000471291100005 ()2-s2.0-85063779800 (Scopus ID)
Konferanse
2018 Renewable Energy Integration with Mini/Microgrid, REM 2018; Rhodes; Greece; 28 September 2018 through 30 September 2018
Merknad

QC 20190523

Tilgjengelig fra: 2019-05-23 Laget: 2019-05-23 Sist oppdatert: 2019-07-24bibliografisk kontrollert
Yan, J., Yang, Y., Campana, P. E. & He, J. (2019). City-level analysis of subsidy-free solar photovoltaic electricity price, profits and grid parity in China. Nature Energy, 4(8), 709-717
Åpne denne publikasjonen i ny fane eller vindu >>City-level analysis of subsidy-free solar photovoltaic electricity price, profits and grid parity in China
2019 (engelsk)Inngår i: Nature Energy, ISSN 2058-7546, Vol. 4, nr 8, s. 709-717Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In recent years, China has become not just a large producer but a major market for solar photovoltaics (PV), increasing interest in solar electricity prices in China. The cost of solar PV electricity generation is affected by many local factors, making it a challenge to understand whether China has reached the threshold at which a grid-connected solar PV system supplies electricity to the end user at the same price as grid-supplied power or the price of desulfurized coal electricity, or even lower. Here, we analyse the net costs and net profits associated with building and operating a distributed solar PV project over its lifetime, taking into consideration total project investments, electricity outputs and trading prices in 344 prefecture-level Chinese cities. We reveal that all of these cities can achieve-without subsidies-solar PV electricity prices lower than grid-supplied prices, and around 22% of the cities' solar generation electricity prices can compete with desulfurized coal benchmark electricity prices.

sted, utgiver, år, opplag, sider
Nature Publishing Group, 2019
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-257458 (URN)10.1038/s41560-019-0441-z (DOI)000481484400019 ()2-s2.0-85070785396 (Scopus ID)
Merknad

QC 20190830

Tilgjengelig fra: 2019-08-30 Laget: 2019-08-30 Sist oppdatert: 2019-08-30bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Enhancing fuel cell durability for fuel cell plug-in hybrid electric vehicles through strategic power management
2019 (engelsk)Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 241, s. 483-490Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
ELSEVIER SCI LTD, 2019
Emneord
Plug-in hybrid electric vehicles (PHEVs), Fuel cell architecture, PEM fuel cell, Power split, Optimal control
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-252622 (URN)10.1016/j.apenergy.2019.02.040 (DOI)000465509500037 ()2-s2.0-85062688030 (Scopus ID)
Merknad

QC 20190603

Tilgjengelig fra: 2019-06-03 Laget: 2019-06-03 Sist oppdatert: 2019-06-03bibliografisk kontrollert
Mancuso, M. V., Campana, P. E. & Yan, J. (2019). Evaluation of grid-connected micro-grid operational strategies. In: Innovative Solutions for Energy Transitions: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018 (pp. 1273-1278). Elsevier, 158
Åpne denne publikasjonen i ny fane eller vindu >>Evaluation of grid-connected micro-grid operational strategies
2019 (engelsk)Inngår i: Innovative Solutions for Energy Transitions, Elsevier, 2019, Vol. 158, s. 1273-1278Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
Elsevier, 2019
Serie
Energy Procedia, ISSN 1876-6102 ; 158
Emneord
Battery, Microgrid, Optimization, Peak shaving, Photovoltaic
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251846 (URN)10.1016/j.egypro.2019.01.315 (DOI)000471031701099 ()2-s2.0-85063866890 (Scopus ID)
Konferanse
10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018
Merknad

QC 20190523

Tilgjengelig fra: 2019-05-23 Laget: 2019-05-23 Sist oppdatert: 2019-07-24bibliografisk kontrollert
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: Innovative Solutions for Energy Transitions: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018 (pp. 4889-4896). Elsevier, 158
Åpne denne publikasjonen i ny fane eller vindu >>Experimental investigations on the thermal energy storage performance of shell and tube unit with composite phase change materials
Vise andre…
2019 (engelsk)Inngår i: Innovative Solutions for Energy Transitions, Elsevier, 2019, Vol. 158, s. 4889-4896Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
Elsevier, 2019
Serie
Energy Procedia, ISSN 1876-6102 ; 158
Emneord
Fined tube, Melting phase change, Metal foam, Thermal energy storage
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251848 (URN)10.1016/j.egypro.2019.01.704 (DOI)000471031705039 ()2-s2.0-85063862517 (Scopus ID)
Konferanse
10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018
Merknad

QC 20190524

Tilgjengelig fra: 2019-05-24 Laget: 2019-05-24 Sist oppdatert: 2019-07-24bibliografisk kontrollert
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: Innovative Solutions for Energy Transitions: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018 (pp. 1317-1322). Elsevier, 158
Åpne denne publikasjonen i ny fane eller vindu >>Identification of thermochemical pathways for the energy and nutrient recovery from digested sludge in wastewater treatment plants
Vise andre…
2019 (engelsk)Inngår i: Innovative Solutions for Energy Transitions, Elsevier, 2019, Vol. 158, s. 1317-1322Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
Elsevier, 2019
Serie
Energy Procedia, ISSN 1876-6102 ; 158
Emneord
Combustion, Digestate, Gasification, Pyrolysis, Wastewater treatment
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251844 (URN)10.1016/j.egypro.2019.01.325 (DOI)000471031701105 ()2-s2.0-85063872188 (Scopus ID)
Konferanse
10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018
Merknad

QC 20190524

Tilgjengelig fra: 2019-05-24 Laget: 2019-05-24 Sist oppdatert: 2019-07-24bibliografisk kontrollert
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 CO 2 capture. Applied Thermal Engineering, 1445-1453
Åpne denne publikasjonen i ny fane eller vindu >>Impacts of thermos-physical properties on plate-fin multi-stream heat exchanger design in cryogenic process for CO 2 capture
Vise andre…
2019 (engelsk)Inngår i: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, s. 1445-1453Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Oxy-fuel combustion is one of the most promising technologies for CO 2 capture for power plants. In oxy-fuel combustion plants, cryogenic process can be applied for CO 2 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 CO 2 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 CO 2 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.

sted, utgiver, år, opplag, sider
Elsevier, 2019
Emneord
CO 2 mixture, Cryogenic process, Heat exchanger, Sensitivity study, Thermos-physical property, Air purification, Carbon dioxide, Chromium compounds, Combustion, Cryogenics, Design, Fins (heat exchange), Fuels, Gas fuel purification, Gas plants, Heat exchangers, Specific heat, Viscosity, Appropriate designs, Heat exchanger design, In-depth understanding, Non-condensable gas, Plate-fin heat exchanger, Sensitivity studies, Thermal conductivity model, Thermal conductivity
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-248171 (URN)10.1016/j.applthermaleng.2018.12.066 (DOI)000460492300127 ()2-s2.0-85059479126 (Scopus ID)
Merknad

QC 20190425

Tilgjengelig fra: 2019-04-25 Laget: 2019-04-25 Sist oppdatert: 2019-10-17bibliografisk kontrollert
Yan, J., Yang, H., Li, H. & Chen, X. (2019). Innovative solutions for energy transitions: Proceedings of the 10th International Conference on Applied Energy (ICAE2018). In: Innovative Solutions for Energy Transitions: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018 (pp. 1-2). Elsevier, 158
Åpne denne publikasjonen i ny fane eller vindu >>Innovative solutions for energy transitions: Proceedings of the 10th International Conference on Applied Energy (ICAE2018)
2019 (engelsk)Inngår i: Innovative Solutions for Energy Transitions, Elsevier, 2019, Vol. 158, s. 1-2Konferansepaper, Publicerat paper (Fagfellevurdert)
sted, utgiver, år, opplag, sider
Elsevier, 2019
Serie
Energy Procedia, ISSN 1876-6102 ; 158
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251889 (URN)10.1016/j.egypro.2019.01.022 (DOI)2-s2.0-85063918913 (Scopus ID)
Konferanse
10th International Conference on Applied Energy, ICAE 2018; Hong Kong; China; 22 August 2018 through 25 August 2018
Merknad

QC 20190603

Tilgjengelig fra: 2019-06-03 Laget: 2019-06-03 Sist oppdatert: 2019-06-03bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0003-0300-0762