Analysis of a clean hydrogen liquefaction plant integrated with a geothermal system

Seyam, Shaimaa; Dinçer, İbrahim; Agelin‐Chaab, Martin

doi:10.1016/j.jclepro.2019.118562

Cited by 72 publications

(19 citation statements)

References 24 publications

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“…Also, some of these systems are MGSs, which means that additional outputs are obtained. For example, the highest rate of hydrogen production refers to a geothermal-driven system, which is 13958 kg/h [97] while that of solar-geothermal is 561.6 kg/h [113]. This is due to the latter being used to supply outputs different to hydrogen.…”

Section: Results Summarymentioning

confidence: 99%

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A review of geothermal energy-driven hydrogen production systems

Mahmoud

Ramadan

Naher

et al. 2021

Thermal Science and Engineering Progress

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Section: Results Summarymentioning

confidence: 99%

“…Thus, it is highly recommended to transform it into liquid hydrogen by passing through a process known as liquefaction [97]. Even though this process may consume more power, liquid hydrogen indeed requires a smaller volume of storage than that of gas.…”

Section: Hydrogen Liquefactionmentioning

confidence: 99%

A review of geothermal energy-driven hydrogen production systems

Mahmoud

Ramadan

Naher

et al. 2021

Thermal Science and Engineering Progress

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“…If the kinetic energy and potential changes in turbines and pumps or compressors are ignored and also considered adiabatic, according to the first law of thermodynamics and isentropic efficiency, the work of each of these components is defined as follows 42 :

{W}_{{\rm{T}}}={m}_{{\rm{T}}}{\eta }_{{\rm{T}}}({h}_{\mathrm{in},{\rm{T}}}-{h}_{\mathrm{out},{\rm{T}}}),

{W}_{{\rm{P}}-{\rm{C}}}={m}_{{\rm{P}}-{\rm{C}}}({h}_{\mathrm{out},{\rm{P}}-{\rm{C}}}-{h}_{\mathrm{in},{\rm{P}}-{\rm{C}}})/{\eta }_{{\rm{P}}-{\rm{C}}}.

…”

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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“…There are many fields in which geothermal energy can be applied. This vast field of precious energy can be indirectly exploited for power generation by using the geofluid in liquid phase which is changed later into steam to drive a steam turbine for electricity production 19‐21 or can directly be used for heating and cooling purposes, whether by passing it directly through pipes to radiators to heat a specific place, or by using absorption chillers which take advantage of the geothermal heat to cool a space by a refrigeration cycle 22,23 . There are many other direct application of geothermal energy, especially for industrial use, such as food drying, distillation, and desalination 24,25 .…”

Section: Introductionmentioning

confidence: 99%

Space cooling using geothermal single‐effect water/lithium bromide absorption chiller

Assad

Sadeghzadeh

Ahmadi

et al. 2021

Energy Science & Engineering

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This research is proposed to fully investigate the performance of a single‐effect water/lithium bromide absorption chiller driven by geothermal energy. Since absorption cycles are considered as low‐grade energy cycles, this innovative idea of rejecting fluid from a single‐flash geothermal power plant with low‐grade energy would serve as efficient, economical, and promising technology. In order to examine the feasibility of this approach, a residential building which is located in Sharjah, UAE, considered to evaluate its cooling capacity of 39 kW which is calculated using MATLAB software. Based on the obtained cooling load, modeling of the required water/lithium bromide single‐effect absorption chiller machine is implemented and discussed. A detailed performance analysis of the proposed model under different conditions is performed using Engineering Equation Solver software (EES). Based on the obtained results, the major factors in the design of the proposed system are the size of the heat exchangers and the input heat source temperature. The results are presented graphically to find out the geofluid temperature and mass flow and solution heat exchanger effectiveness effects on the chiller thermal performance. Moreover, the effects of the size of all components of the absorption chiller on the cooling load to meet the space heating are presented. The thermal efficiency of the single‐flash geothermal power plant is about 13% when the power plant is at production well temperature 250℃, separator pressure 0.24 MPa, and condenser pressure 7.5 kPa. The results show that the coefficient of performance (COP) reaches about 0.87 at solution heat exchanger effectiveness of 0.9, when the geofluid temperature is 120℃.

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Analysis of a clean hydrogen liquefaction plant integrated with a geothermal system

Cited by 72 publications

References 24 publications

A review of geothermal energy-driven hydrogen production systems

A review of geothermal energy-driven hydrogen production systems

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

Space cooling using geothermal single‐effect water/lithium bromide absorption chiller

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