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Publications (10 of 88) Show all publications
Kabalina, N., Costa, M., Weihong, Y. & Martin, A. R. (2018). Impact of a reduction in heating, cooling and electricity loads on the performance of a polygeneration district heating and cooling system based on waste gasification. Energy Journal, 151, 594-604
Open this publication in new window or tab >>Impact of a reduction in heating, cooling and electricity loads on the performance of a polygeneration district heating and cooling system based on waste gasification
2018 (English)In: Energy Journal, ISSN 0195-6574, E-ISSN 1944-9089, Vol. 151, p. 594-604Article in journal (Refereed) Published
Keyword
polygeneration, district heating and cooling, refuse derived fuel, municipal solid waste, gasification
National Category
Other Engineering and Technologies Environmental Engineering
Identifiers
urn:nbn:se:kth:diva-226907 (URN)10.1016/j.energy.2018.03.078 (DOI)000432509000051 ()2-s2.0-85046033334 (Scopus ID)
Note

QC 20180504

Available from: 2018-04-27 Created: 2018-04-27 Last updated: 2018-06-13Bibliographically approved
Samavati, M., Martin, A. R., Nemanova, V. & Santarelli, M. (2018). Integration of solid oxide electrolyser, entrained gasification, and Fischer-Tropsch process for synthetic diesel production: Thermodynamic analysis. International journal of hydrogen energy, 43(10), 4785-4803
Open this publication in new window or tab >>Integration of solid oxide electrolyser, entrained gasification, and Fischer-Tropsch process for synthetic diesel production: Thermodynamic analysis
2018 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 43, no 10, p. 4785-4803Article in journal (Refereed) Published
Abstract [en]

A novel integrated renewable-based energy system for production of synthetic diesel is proposed and simulated in this study. This system merges solid oxide electrolyser (SOE), entrained gasification (EG) and Fischer-Tropsch (FT) technologies. Two case scenarios are considered here. In the first case, the electrolyser unite produce syngas through co-electrolysis of steam and carbon dioxide, while in the second case only steam is electrolyzed. The effects of SOEC and EG operating pressure and temperatures on the system performance in each case are investigated and compared. It is shown that the operating condition of electrolyser subsystem has a more considerable effect on the performance of the integrated system as compared to the gasification subsystem. Also waste heat recovery results in about 43 and 2 percentage point increase in energy and exergy efficiency, respectively. It is also shown that internal recovering of oxygen has the best effect on the system performance.

Place, publisher, year, edition, pages
Elsevier, 2018
Keyword
Solid oxide electrolyser, Entrained gasification, Fischer-Tropsch, Synthetic fuel production, Energy analysis, Exergy analysis
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-226796 (URN)10.1016/j.ijhydene.2018.01.138 (DOI)000429399400001 ()2-s2.0-85041958332 (Scopus ID)
Note

QC 20180427

Available from: 2018-04-27 Created: 2018-04-27 Last updated: 2018-04-27Bibliographically approved
Samavati, M., Santarelli, M., Martin, A. R. & Nemanova, V. (2018). Production of Synthetic Fischer-Tropsch Diesel from Renewables: Thermoeconomic and Environmental Analysis. Energy & Fuels, 32(2), 1744-1753
Open this publication in new window or tab >>Production of Synthetic Fischer-Tropsch Diesel from Renewables: Thermoeconomic and Environmental Analysis
2018 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 32, no 2, p. 1744-1753Article in journal (Refereed) Published
Abstract [en]

In this study, a novel integrated system for production of advanced synthetic diesel is proposed and analyzed from thermodynamic, economic, and environmental perspectives. This system consists of a solid oxide electrolyzer, entrained gasification, a Fischer Tropsch reactor (FT), and upgrading processes. Eleven different combinations of precursor syngas production through steam and CO, co-electrolysis and biomass gasification are investigated. Results show that an increasing share of produced syngas in the electrolyzer unit results in higher system efficiencies, emission savings, and levelized cost of FT diesel. Moreover, different options of heat and mass :flow recovery are considered. It is concluded that recovery of produced medium pressure steam in the system is highly beneficial and recommended. Besides, it is shown that while oxygen recovery is the best choice of mass recovery, hydrogen recovery for internal use has adverse effect on the system performance.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Bioenergy
Identifiers
urn:nbn:se:kth:diva-225318 (URN)10.1021/acs.energyfuels.7b02465 (DOI)000426015000077 ()2-s2.0-85042177733 (Scopus ID)
Note

QC 20180404

Available from: 2018-04-04 Created: 2018-04-04 Last updated: 2018-05-24Bibliographically approved
Samavati, M., Martin, A. R., Santarelli, M. & Nemanova, V. (2018). Synthetic diesel production as a form of renewable energy storage. Energies, 11(5), Article ID 1223.
Open this publication in new window or tab >>Synthetic diesel production as a form of renewable energy storage
2018 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 11, no 5, article id 1223Article in journal (Refereed) Published
Abstract [en]

Production of synthetic hydrocarbon fuels as a means for renewable energy storage has gained attention recently. Integration of solid oxide co-electrolysis of steam and carbon dioxide with the Fischer-Tropsch process to transform renewable electricity into Fischer-Tropsch diesel is one of the promising suggested pathways. However, considering the intermittency of produced renewable electricity such integration will have a low capacity factor. Besides, locating a reliable source of carbon dioxide near the installed integrated system may prove to be difficult. A novel integration for production of Fischer-Tropsch diesel from various renewable sources is suggested in this study. The proposed integrated system includes solid oxide electrolysis, entrained gasification, Fischer-Tropsch process and an upgrading system. Gasification is assumed to have a continuous operation which increases capacity factor of the integrated system. Carbon dioxide supplied via gasification of biomass provides a reliable source for on-site co-electrolysis. Technical capabilities of the proposed integrated system examined by investigating performance in relation with electricity, and diesel demand of four different European cities. Results show that the proposed system is capable of supplying Fischer-Tropsch diesel of between 0.9-32% of the annual diesel demand for road transportation respective to the location of installation, with a high emission savings (around 100%). Cost of produced diesel is not competitive with conventional diesel for all cases, even when all the other by-products were assumed to be sold to the market.

Place, publisher, year, edition, pages
MDPI AG, 2018
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-228952 (URN)10.3390/en11051223 (DOI)2-s2.0-85047057171 (Scopus ID)
Note

QC 20180530

Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2018-05-30Bibliographically approved
Kumar, N. T. & Martin, A. R. (2017). Co-Production Performance Evaluation of a Novel Solar Combi System for Simultaneous Pure Water and Hot Water Supply in Urban Households of UAE. Energies, 10(4), Article ID 481.
Open this publication in new window or tab >>Co-Production Performance Evaluation of a Novel Solar Combi System for Simultaneous Pure Water and Hot Water Supply in Urban Households of UAE
2017 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 10, no 4, article id 481Article in journal (Refereed) Published
Abstract [en]

Water is the most desirable and sparse resource in Gulf cooperation council (GCC) region. Utilization of point-of-use (POU) water treatment devices has been gaining huge market recently due to increase in knowledge of urban population on health related issues over contaminants in decentralized water distribution networks. However, there is no foolproof way of knowing whether the treated water is free of contaminants harmful for drinking and hence reliance on certified bottled water has increased worldwide. The bottling process right from treatment to delivery is highly unsustainable due to huge energy demand along the supply chain. As a step towards sustainability, we investigated various ways of coupling of membrane distillation (MD) process with solar domestic heaters for co-production of domestic heat and pure water. Performance dynamics of various integration techniques have been evaluated and appropriate configuration has been identified for real scale application. A solar combi MD (SCMD) system is experimentally tested for single household application for production 20 L/day of pure water and 250 L/day of hot water simultaneously without any auxiliary heating device. The efficiency of co-production system is compared with individual operation of solar heaters and solar membrane distillation.

Place, publisher, year, edition, pages
MDPI AG, 2017
Keyword
solar domestic hot water (SDHW), co-production, membrane distillation (MD), solar combi, thermal storage
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-208255 (URN)10.3390/en10040481 (DOI)000400065000070 ()
Note

QC 20170626

Available from: 2017-06-26 Created: 2017-06-26 Last updated: 2017-11-29Bibliographically approved
Kabalina, N., Costa, M., Weihong, Y. & Martin, A. R. (2017). Energy and economic assessment of a polygeneration district heating and cooling system based on gasification of refuse derived fuels. Paper presented at 29th International Conference on Efficiency, Cost, Optimisation, Simulation, and Environmental Impact of Energy Systems (ECOS), JUN 19-23, 2016, Portoroz, SLOVENIA. Energy, 137, 696-705
Open this publication in new window or tab >>Energy and economic assessment of a polygeneration district heating and cooling system based on gasification of refuse derived fuels
2017 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 137, p. 696-705Article in journal (Refereed) Published
Abstract [en]

Conventional district heating and cooling (DHC) systems are compelled to reduce their fossil fuel dependency while ensuring profitability as cooling and heating demands decline. One solution is to retrofit the system with a gasifier and product gas upgrading equipment so that the system will be able to diversify its fuel input, including biomass and waste resources, while simultaneously producing synthetic natural gas (SNG), synthetic gas (syngas) and char complementarily to heat, cold and electricity. The main objective of this study is to assess energetically and economically a polygeneration DHC system based on gasification of refuse derived fuels considering the following sub-product scenarios: char; char and syngas; char and SNG; and char, syngas and SNG. The results show that when char is the only sub product of the modified DHC system, the investment payback is 3 years, the discounted net cash flow (DNCF) is 142 mln USD, and the system trigeneration efficiency is 83.6%. When other sub-products are supplied by the system, its performance reduces but the system DNCF increases, while the investment payback remains constant.

Place, publisher, year, edition, pages
Elsevier, 2017
Keyword
Gasification, Polygeneration, District heating and cooling system, Energy and economic assessment
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-219347 (URN)10.1016/j.energy.2017.06.110 (DOI)000414879400062 ()2-s2.0-85021386850 (Scopus ID)
Conference
29th International Conference on Efficiency, Cost, Optimisation, Simulation, and Environmental Impact of Energy Systems (ECOS), JUN 19-23, 2016, Portoroz, SLOVENIA
Note

QC 20171205

Available from: 2017-12-05 Created: 2017-12-05 Last updated: 2018-04-27Bibliographically approved
Lorenzi, G., Lanzini, A., Santarelli, M. & Martin, A. R. (2017). Exergo-economic analysis of a direct biogas upgrading process to synthetic natural gas via integrated high-temperature electrolysis and methanation. Energy, 141, 1524-1537
Open this publication in new window or tab >>Exergo-economic analysis of a direct biogas upgrading process to synthetic natural gas via integrated high-temperature electrolysis and methanation
2017 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 141, p. 1524-1537Article in journal (Refereed) Published
Abstract [en]

Biogas upgrading to synthetic natural gas (SNG) is a viable and appealing route for power-to-gas because it combines waste management with the use of the surplus electricity that might arise in energy systems having a considerable share of renewable energy sources in their production mix. In this work, the exergo-economic performance of a biogas upgrading process through integrated electrolysis and methanation is assessed in connection with the current market status to test which conditions could make the proposed option economically viable. Two different configurations, which differ mainly for the operating pressure of the electrolyser, are compared. The exergy efficiencies are high (>80%) and exergo-economic costs of the produced bio-SNG in the two analyzed configurations are 5.62 and 4.87 c(sic)/kWh(exergy), for low- and high-pressure respectively. Lower values would be required for the bio-SNG to compete with fossil natural gas. We show how both the input electricity price and the capacity factor have a substantial impact on the economic sustainability of the process. Eventually, the monetary exploitation of the oxygen produced by electrolysis and the participation to the emission trading scheme could contribute further to improve the economic attractiveness of the process.

Place, publisher, year, edition, pages
Elsevier, 2017
Keyword
Power-to-gas, Biogas upgrading, SOEC, Exergo-economic analysis, Carbon capture and usage (CCU)
National Category
Energy Systems
Identifiers
urn:nbn:se:kth:diva-222456 (URN)10.1016/j.energy.2017.11.080 (DOI)000423249200015 ()2-s2.0-85034747846 (Scopus ID)
Note

QC 20180209

Available from: 2018-02-09 Created: 2018-02-09 Last updated: 2018-02-09Bibliographically approved
Kabalina, N., Costa, M., Weihong, Y., Martin, A. & Santarelli, M. (2017). Exergy analysis of a polygeneration-enabled district heating and cooling system based on gasification of refuse derived fuel. Journal of Cleaner Production, 141, 760-773
Open this publication in new window or tab >>Exergy analysis of a polygeneration-enabled district heating and cooling system based on gasification of refuse derived fuel
Show others...
2017 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 141, p. 760-773Article in journal (Refereed) Published
Abstract [en]

District heating and cooling (DHC) systems, modified or retrofitted with integration of gasifiers and gas upgrading equipment, represent promising alternatives to traditional approaches since various scenarios of products complementary to heat, cold, and electricity can be realized, namely: char only; char and syngas; char, synthetic natural gas (SNG) and hydrogen (H-2); and char, syngas, SNG and H-2. This manuscript evaluates a polygeneration-enabled DHC system in detail (operation during a typical year) from exergetic and exergoeconomic perspectives. The base DHC system utilizes natural gas as fuel with a nominal capacity of 29 MW heat, 35 MW of cold, and 5 MW of electricity. The retrofit employs refuse derived fuel (RDF) as feedstock to an atmospheric gasifier with downstream gas clean-up, a gas turbine, and a heat recovery steam generator along with heat exchangers for integration with the base DHC system. The exergy analysis revealed that the polygeneration system presents adequate performance at all scenarios established. Among the sets of value-added products the combination of char and syngas is the most beneficial as the system efficiency reaches a value of similar to 72%. The outcomes of the exergoeconomic analysis support the exergy results. The lower production costs for value-added products are achieved for the maximum simultaneous char and syngas production, with each of these costs estimated to be 6.1 USD/GJ.

Place, publisher, year, edition, pages
Elsevier, 2017
Keyword
Exergy, Gasification, Synthetic natural gas, Polygeneration, District heating and cooling
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-199463 (URN)10.1016/j.jclepro.2016.09.151 (DOI)000389090300069 ()2-s2.0-84994494343 (Scopus ID)
Note

QC 20170123

Available from: 2017-01-23 Created: 2017-01-09 Last updated: 2018-04-27Bibliographically approved
Asim, M., Imran, M., Leung, M. K. H., Kumar, N. T., Martin, A. R. & Kashif, F. (2017). Experimental analysis of solar thermal integrated MD system for cogeneration of drinking water and hot water for single family villa in Dubai using flat plate and evacuated tube solar collectors. Desalination and Water Treatment, 92, 46-59
Open this publication in new window or tab >>Experimental analysis of solar thermal integrated MD system for cogeneration of drinking water and hot water for single family villa in Dubai using flat plate and evacuated tube solar collectors
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2017 (English)In: Desalination and Water Treatment, ISSN 1944-3994, E-ISSN 1944-3986, Vol. 92, p. 46-59Article in journal (Refereed) Published
Abstract [en]

This paper presents the experimental analysis performed on solar thermal integrated membrane distillation (MD) system using flat plate and evacuated tube collectors. The system will be utilized for cogeneration of drinking water and domestic hot water for single family in Dubai comprising of four to five members. Experiments have been performed in Ras Al Khaimah Research and Innovation Centre (RAKRIC) facility. The experimental setup has been installed to achieve the required production of 15-25 L/d of drinking water and 250 L/d of hot water for domestic purposes. Experiments have been performed on MD setup at optimized flow rates of 6 L/min on hot side and 3 L/min on cold side for producing the desired distillate. The hot side and cold side MD temperature has been maintained between 60 degrees C and 70 degrees C, and 20 degrees C and 30 degrees C. The total annual energy demand comes out to be 8,223 kWh (6,000 kWh is for pure water and 2,223 kWh for hot water). The optimum aperture areas for flat plate and evacuated tube collector field have been identified as 8.5 and 7.5 m(2), respectively. Annual energy consumption per liter for pure water production is 1, 0.85 and 0.7 kWh/L for different MD hot and cold inlet temperatures.

Place, publisher, year, edition, pages
DESALINATION PUBL, 2017
Keyword
Membrane distillation, RAKRIC, Flat plate collectors, Evacuated tube collectors, Annual energy demand
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-220846 (URN)10.5004/dwt.2017.21499 (DOI)000418408700006 ()2-s2.0-85037055301 (Scopus ID)
Note

QC 20180110

Available from: 2018-01-10 Created: 2018-01-10 Last updated: 2018-03-12Bibliographically approved
Kumar, N. T. & Martin, A. R. (2017). Experimental modeling of an air-gap membrane distillation module and simulation of a solar thermal integrated system for water purification. Desalination and Water Treatment, 84, 123-134
Open this publication in new window or tab >>Experimental modeling of an air-gap membrane distillation module and simulation of a solar thermal integrated system for water purification
2017 (English)In: Desalination and Water Treatment, ISSN 1944-3994, E-ISSN 1944-3986, Vol. 84, p. 123-134Article in journal (Refereed) Published
Abstract [en]

Membrane distillation is a novel process that could be adapted effectively for many water purification applications. In recent years, several bench, pilot and commercial scale membrane distillation systems with production capacities ranging from 20 L/d to 50 m(3)/d were developed and tested. In this work, a single cassette air-gap membrane distillation (AGMD) module was characterized to identify the effect of process parameters on distillate flux and thermal efficiency. Favorable conditions to obtain distillate flow rate of 1.5-3 kg/h were determined on a bench scale experimental setup. Factorial design of experiments was conducted and response surface methodology (RSM) was applied to develop an empirical regression model relating operating parameters with AGMD system performance indicators. Operating parameters including hot feed inlet temperature (T-Hin), cold feed inlet temperature (T-Cin), feed flow rate (V-f) and feed conductivity (C-f) were considered. Distillate flux (J(d)) and specific performance ratio (SPR) were selected as the performance indicators for the modeling. The developed regression model using RSM was tested by analysis of variance. Regression analysis showed agreement with the experimental data fitted with second-order polynomial model having determination coefficient (R-2) values of 0.996 and 0.941 for J(d) and SPR, respectively. Numerical optimization has been carried out to identify optimal set of operating conditions for achieving desired operation. Also, dynamic simulation of the membrane distillation module integrated solar thermal system has been reported along with validation of the system model by comparing with the experimental data obtained from a pilot scale setup located in UAE.

Place, publisher, year, edition, pages
DESALINATION PUBL, 2017
Keyword
AGMD, Factorial design, Response surface methodology, ANOVA, Solar membrane distillation
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-217068 (URN)10.5004/dwt.2017.21201 (DOI)000412880600013 ()2-s2.0-85031296454 (Scopus ID)
Note

QC 20171122

Available from: 2017-11-22 Created: 2017-11-22 Last updated: 2018-03-12Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0002-3661-7016

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