Geothermal electricity generation and desalination: an integrated process design to conserve latent heat with operational improvements

Missimer, Thomas M.; Ng, Kim Choon; Thuw, Kyaw; Shahzad, Muhammad Wakil

doi:10.1080/19443994.2016.1144693

Cited by 32 publications

(10 citation statements)

References 37 publications

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“…Integration of AD to the last stage of MED can boost water production to twofold by extending inter-stage temperature ( Table 9). MEDAD hybrid cycle improvement factor = 2.0 [155][156][157][158][159][160][161][162][163][164][165][166][167][168][169][170][171][172][173]. Table 9.…”

Section: Thermal Process Integration With Ad Cyclementioning

confidence: 99%

Renewable Energy-Driven Desalination Hybrids for Sustainability

Shahzad¹,

Ybyraiymkul

MuhammadBurhan

et al. 2018

Desalination and Water Treatment

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The expansion trend of current desalination processes is expected to boost brine rejection to 240 km 3 and CO 2 emission to 400 million tons per year by 2050. This high brine rejection and CO 2 emission rates are copping COP21 goal, maintaining temperature rise below 2°C. An innovative and energy-efficient process/material is required to achieve Paris Agreement targets. Highly efficient adsorbent cycle integration is proposed with well-proven conventional desalination processes to improve energy efficiency and to reduce environmental and marine pollution. The adsorbent cycle is operated with solar or low-grade industrial waste heat, available in abundance in water stress regions. The proposed integration with membrane processes will save 99% energy and over 150% chemical rejection to sea. In case of thermally driven cycles, the proposed hybridization will improve energy efficiency to 39% and will reduce over 80% chemical rejection. This can be one solution to achieve Paris Agreement (COP21) targets for climate control that can be implemented in near future.

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Section: Thermal Process Integration With Ad Cyclementioning

confidence: 99%

Renewable Energy-Driven Desalination Hybrids for Sustainability

Shahzad¹,

Ybyraiymkul

MuhammadBurhan

et al. 2018

Desalination and Water Treatment

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“…Missimer et al [34] and Ghaffour et al [29] combined solar energy with geothermal energy and developed a hybrid approach to desalinate seawater. Missimer et al [35] demonstrated two successful strategies to desalinate seawater using geothermal energy. They used the latent heat from their geothermal electricity generation site to power a coupled Multiple Effect Distillation (MED)-AD system, and diverted some of the generated electricity to power an RO system.…”

Section: Introductionmentioning

confidence: 99%

Modeling geothermal energy efficiency from abandoned oil and gas wells to desalinate produced water

2017

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This study investigated the use of low temperature geothermal resources to convert salty produced water into a freshwater resource. The research retrofits soon-to-be-shut-down oil and gas wells as geothermal wells, simultaneously overcoming drilling costs and scale formation by using a freshwater closed loop system for thermal energy delivery. Heat transfer modeling was combined with water treatment thermodynamics to develop a predictive tool that can be used to estimate daily deliverable treated water. Results indicated that the developed model was most sensitive to well depth, geothermal gradient, and total dissolved solids in the produced water.Results also indicated that a 4,000 m deep well with a geothermal gradient of 0.05 º C/m can successfully treat produced water with as high as 170,000 mg/L total dissolved solids and still deliver almost 600,000 L of clean water per day. An illustrative demonstration indicated that in the Eagle Ford Shale in Texas, more than 60% of the drilled basin area can deliver at least half a million liters of treated water daily under ideal conditions. This is particularly meaningful as Texas experiences extended periods of drought and the treated produced water would represent a new and resilient source of water.

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“…Many authors proposed the exploitation of residual geothermal brines to recover additional energy and/or water and minerals [13][14][15][24][25][26][27][28]. From the energy recovery point of view, the most concrete answer is offered by the organic Rankine cycles (ORCs), well-established systems capable of achieving acceptable efficiencies at low temperatures [29][30][31].…”

mentioning

confidence: 99%

“…From the resource recovery point of view, many desalination processes (mainly thermal-based to exploit low-enthalpy sources) have been applied to geothermal brines, mainly for research and development purposes [14][15][16][17][18][25][26][27][28]. Thermal processes can be perfectly integrated with the residual heat from the geothermal plant.…”

mentioning

confidence: 99%

Reuse of Waste Geothermal Brine: Process, Thermodynamic and Economic Analysis

Capocelli

Moliterni

Piemonte

et al. 2020

Water

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Geothermal brines can be a resource of energy, freshwater and minerals. Even when rejected after their exploitation to produce energy in a power plant, the brines can be a source of freshwater and minerals, and can have a residual enthalpy that can be recovered to produce additional power. The different reuse scenarios of these wasted brines depend on the composition and temperature at which they must be reinjected into the wells. On this basis, geothermal energy production is a perfect case study to investigate the water–energy nexus and to optimize the integrated energy- and water-production processes. In this paper, two case studies of brine reuse for both energy and water production are presented with the related process analysis, basic design and technical–economic analysis. A methodology to evaluate the exergy efficiency of the processes is presented by analyzing minimum work of separation, the maximum achievable work and the additional primary energy required for integrated production. The novel approach to estimate the process efficiency for integrated geothermal energy and desalination plants is applied to the case studies and discussed in light of literature results.

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Geothermal electricity generation and desalination: an integrated process design to conserve latent heat with operational improvements

Cited by 32 publications

References 37 publications

Renewable Energy-Driven Desalination Hybrids for Sustainability

Renewable Energy-Driven Desalination Hybrids for Sustainability

Modeling geothermal energy efficiency from abandoned oil and gas wells to desalinate produced water

Reuse of Waste Geothermal Brine: Process, Thermodynamic and Economic Analysis

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