A hybrid molten carbonate fuel cell and parabolic trough solar collector, combined heating and power plant with carbon dioxide capturing process

Marefati, Mohammad; Mehrpooya, Mehdi; Shafii, Mohammad Behshad

doi:10.1016/j.enconman.2019.01.002

Cited by 100 publications

(14 citation statements)

References 47 publications

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“…Comparison of the hybrid system developed with similar cogeneration structures based on the MCFC 25,27,34,44,50–54 . MCFC, molten carbonate fuel cell…”

Section: Process Simulationmentioning

confidence: 99%

An innovative integrated CCHP system with water scrubbing‐based biogas upgrading unit and molten carbonate fuel cell

Ghorbani

Ebrahimi

Skandarzadeh

2022

Energy Science & Engineering

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The main purpose of this study is to develop an integrated structure of simultaneous generation of electricity and refrigeration as the main product and hot water as a by-product. This proposed structure consists of a water scrubbing biogas upgrading process, molten carbonate fuel cell (MCFC) unit, gas/ steam power (GSP) cycle, and absorption refrigeration (AR) system. In this regard, 10.71 kg/s untreated biogas enters the integrated system and 158,351 kW net power is produced. Wasted heat of the structure is utilized to generate cooling of 253.9 kW at a temperature of 243.6 K by applying the AR system and the rest of the heat is used to generate 8.391 kg/s hot water as the system byproducts. The process integration between the different parts has led to an increase in the thermal efficiency of the whole system so that the electrical and overall efficiencies are 78.68% and 79.86%, respectively. The investigation of the exergy study demonstrates that the exergy destruction of the entire structure is 71,859 kW, of which the turbine/compressor/pump section with 24,700 kW (with a share of 34.37% of the total) and MCFC/reformer section with 22,285 kW (with a share of 31.01% of the total) have the most irreversibility. The exergy efficiency of the hybrid structure is 71.06%. Through a parametric study, the present integrated system in various conditions is assessed. One of the results of main outcomes is the increase of overall efficiency up to 83.39% due to the reduction of inlet biogas methane mole content up to 50%. Rising the methane in inlet biogas, although leading to more production of system products, reduces the efficiencies of various parts of the system, including the MCFC unit and GSP cycle, as well as integrated system total efficiency. K E Y W O R D Sabsorption refrigeration cycle, biogas upgrading cycle, combined power plant, exergy analysis, molten carbonate fuel cell

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“…Comparison of the hybrid system developed with similar cogeneration structures based on the MCFC 25,27,34,44,50–54 . MCFC, molten carbonate fuel cell…”

Section: Process Simulationmentioning

confidence: 99%

An innovative integrated CCHP system with water scrubbing‐based biogas upgrading unit and molten carbonate fuel cell

Ghorbani

Ebrahimi

Skandarzadeh

2022

Energy Science & Engineering

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“…As mentioned, the total power required by the UAV for the mission is 1253.7 W. Assuming that all this power is provided by the PEMFC (or AFC), the required number of cells of PEMFC and AFC can be determined according to Equations ( 5) and (10), respectively. Figure 12 shows the number of cells of PEMFC and AFC in different flight modes.…”

Section: Uavmentioning

confidence: 99%

“…A relatively novel idea to power UAVs is to use fuel cell system 9 . The fuel cell generates electricity from the fuel chemical energy 10 . In addition, its by‐product (heat) can be benefited from heat demands 11 .…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of two proton exchange membrane and alkaline fuel cells for use inUAVsby investigating the effect of operating altitude

Rostami¹,

Manshadi²,

Afshari

2021

Intl J of Energy Research

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Summary Fuel cells today have a variety of applications, such as fueling vehicles, which lead to a reduction in conventional fuel consumption and environmental pollution. On the other hand, in the present era, unmanned aerial vehicle (UAV) is known as one of the most important unmanned systems for delivering postal packages, environmental monitoring, disaster relief, and military target. However, the performance of fuel cells is affected by their operating pressure and temperature. In addition, due to some political and technical considerations, the performance of these systems (especially UAV based on fuel cells) is very rare in the literature. The present work provides a conceptual design of UAV propulsion system based on a fuel cell system and a battery. The performance of two different fuel cells, namely the alkaline fuel cell (AFC) and proton exchange membrane fuel cell (PEMFC), is examined separately and compared. Mission and constraint analyses of the system, as well as weight distribution of UAV, are provided. Furthermore, the performance of the UAV propulsion system in different flight modes and the performance of fuel cells under atmospheric conditions are discussed. It should be noted that reference UAV data are used for input parameters. It was found that the total power required by the UAV to carry out the mission is equal to 1253.7 W, which the share of takeoff, climb, cruise, and maximum speed flight modes were 321.3, 608.5, 118.3, and 205.6 W, respectively. Furthermore, the UAV under study, in this paper, has flight endurance of about 7.4 hours. Also, the required area of the PEMFC and AFC to supply the UAV power under the study conditions is about 0.03 and 0.6 m2, respectively. Finally, it observed that with increasing altitude (in the absence of a heating system) the performance of both fuel cells is greatly reduced.

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“…Therefore, how this energy is supplied is of interest to energy field researchers around the world 3 . Amongst clean energy technologies, solar energy is the suitable engaged choice for both electrical and thermal energies generations, especially in regions with high solar irradiance 4 . For decades, studies of solar energy systems have received much attention around the world 5 .…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of a new combined energy system includes parabolic dish solar collector, Stirling engine and thermoelectric device

et al. 2021

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Summary According to new findings, the use of clean energy sources such as solar energy to supply energy (both electricity and heat) to human societies is essential. On the other hand, choosing the appropriate technology to convert solar energy into useful energy in the form of individual or combined systems is a fundamental issue. Individual solar energy systems have inherently low performance. However, their use in hybrid energy systems with other energy generation devices is key solution and shows high performance. The present work provides the performance of a new combined energy system composed of the parabolic dish solar collector (PDC), Stirling engine (SE) and thermoelectric device (TD) under various parameters. Sun is the main source of energy in this system, where, sunlight is focused on the PDC focal point by the parabolic shaped mirrors. Thus, the useful thermal power is produced by PDC and then feeds to the SE. The operating fluid of the engine is heated by this heat and converted into mechanical energy. Then, the mechanical energy is converted into electricity by a generator connected to the SE and the excess heat is lost from the engine. The exhaust of the SE transferred to the TEG hot end and produces further electricity. In addition, the TEC module absorbs the cooled environment heat and produces cooling energy (by consuming electricity from the TEG). Therefore, the proposed combined process provides the electricity, heat and cooling. The paper is based on the following three scenarios: (1) the system performance is evaluated under constant climatic conditions, (2) climate data from five various cities in Europe and Asia are used for system operation and (3) this scenario presents the general comparison between the two different hybrid energy systems driven by PDC and linear Fresnel reflector (LFR). In addition, multi‐objective optimization is provided to obtain the optimal performance of the developed hybrid system. The optimization results showed that, the optimum total output electricity and overall efficiency were 26.21 kW and 39.17%, respectively. It was also found that, average daily useful power generated by PDC in Moscow on 14‐June is 373.97 W/m2, which is about 11.1%, 1.55%, 33.3% and 14.23% more than Tehran, Beijing, Geneva and Kiev, respectively. Furthermore, increasing the temperature of PDC absorber improves the performance of SE and TD and subsequently improves the overall operation. Also, in terms of the PDC numbers, the system in the cities of Tehran, Beijing and Moscow has a better justification compared to the other two cities (Geneva and Kiev).

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A hybrid molten carbonate fuel cell and parabolic trough solar collector, combined heating and power plant with carbon dioxide capturing process

Cited by 100 publications

References 47 publications

An innovative integrated CCHP system with water scrubbing‐based biogas upgrading unit and molten carbonate fuel cell

An innovative integrated CCHP system with water scrubbing‐based biogas upgrading unit and molten carbonate fuel cell

Performance evaluation of two proton exchange membrane and alkaline fuel cells for use inUAVsby investigating the effect of operating altitude

Numerical investigation of a new combined energy system includes parabolic dish solar collector, Stirling engine and thermoelectric device

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