Membrane distillation at the water-energy nexus: limits, opportunities, and challenges

2018 ◽  
Vol 11 (5) ◽  
pp. 1177-1196 ◽  
Author(s):  
Akshay Deshmukh ◽  
Chanhee Boo ◽  
Vasiliki Karanikola ◽  
Shihong Lin ◽  
Anthony P. Straub ◽  
...  
Keyword(s):  
Critical Review ◽  
High Salinity ◽  
Membrane Distillation ◽  
Low Grade ◽  
Water Energy Nexus ◽  
Low Grade Heat

This critical review investigates the potential for membrane distillation to desalinate high-salinity waters using low-grade heat at the water-energy nexus.

Pressure-retarded membrane distillation for simultaneous hypersaline brine desalination and low-grade heat harvesting

2020 ◽  
Vol 597 ◽  
pp. 117765 ◽  
Author(s):  
Ziwen Yuan ◽  
Yanxi Yu ◽  
Li Wei ◽  
Xiao Sui ◽  
Qianhong She ◽  
...  
Keyword(s):  
Membrane Distillation ◽  
Low Grade ◽  
Low Grade Heat

scholarly journals Hybrid Membrane Distillation and Wet Scrubber for Simultaneous Recovery of Heat and Water from Flue Gas

Entropy ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 178 ◽  
Author(s):  
Mohd Hizami Mohd Yusoff ◽  
Ein K. Nyunt ◽  
Muhammad Roil Bilad ◽  
Nasrul Arahman ◽  
Sri Mulyati ◽  
...  
Keyword(s):  
Water Vapor ◽  
Flow Rate ◽  
Flue Gas ◽  
Membrane Distillation ◽  
Heat Fluxes ◽  
Low Grade ◽  
Gas Temperature ◽  
Wet Scrubber ◽  
Low Grade Heat ◽  
Water Scrubber

Flue gas contains high amount of low-grade heat and water vapor that are attractive for recovery. This study assesses performance of a hybrid of water scrubber and membrane distillation (MD) to recover both heat and water from a simulated flue gas. The former help to condense the water vapor to form a hot liquid flow which later used as the feed for the MD unit. The system simultaneously recovers water and heat through the MD permeate. Results show that the system performance is dictated by the MD performance since most heat and water can be recovered by the scrubber unit. The scrubber achieved nearly complete water and heat recovery because the flue gas flows were supersaturated with steam condensed in the water scrubber unit. The recovered water and heat in the scrubber contains in the hot liquid used as the feed for the MD unit. The MD performance is affected by both the temperature and the flow rate of the flue gas. The MD fluxes increases at higher flue gas temperatures and higher flow rates because of higher enthalpy of the flue gas inputs. The maximum obtained water and heat fluxes of 12 kg m−2 h−1 and 2505 kJm−2 h−1 respectively, obtained at flue gas temperature of 99 °C and at flow rate of 5.56 L min−1. The MD flux was also found stable over the testing period at this optimum condition. Further study on assessing a more realistic flue gas composition is required to capture complexity of the process, particularly to address the impacts of particulates and acid gases.

scholarly journals Hybrid Pressure Retarded Osmosis–Membrane Distillation System for Power Generation from Low-Grade Heat: Thermodynamic Analysis and Energy Efficiency

2014 ◽  
Vol 48 (9) ◽  
pp. 5306-5313 ◽  
Author(s):  
Shihong Lin ◽  
Ngai Yin Yip ◽  
Tzahi Y. Cath ◽  
Chinedum O. Osuji ◽  
Menachem Elimelech
Keyword(s):  
Power Generation ◽  
Energy Efficiency ◽  
Thermodynamic Analysis ◽  
Membrane Distillation ◽  
Low Grade ◽  
Pressure Retarded Osmosis ◽  
Distillation System ◽  
Low Grade Heat

Pressure-retarded membrane distillation for low-grade heat recovery: The critical roles of pressure-induced membrane deformation

2019 ◽  
Vol 579 ◽  
pp. 90-101 ◽  
Author(s):  
Ziwen Yuan ◽  
Li Wei ◽  
Jannatul Dil Afroze ◽  
Kunli Goh ◽  
Yumao Chen ◽  
...  
Keyword(s):  
Heat Recovery ◽  
Membrane Distillation ◽  
Low Grade ◽  
Membrane Deformation ◽  
Induced Membrane ◽  
Low Grade Heat

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

scholarly journals Thermally regenerative electrochemical cycle for low-grade heat harnessing

2021 ◽  
Vol 2 (2) ◽  
pp. 021304
Author(s):  
Hang Zhang ◽  
Qing Wang
Keyword(s):  
Low Grade ◽  
Low Grade Heat

scholarly journals Low‐Grade Heat Harvesting: Efficient Low‐Grade Heat Harvesting Enabled by Tuning the Hydration Entropy in an Electrochemical System (Adv. Mater. 13/2021)

2021 ◽  
Vol 33 (13) ◽  
pp. 2170096
Author(s):  
Caitian Gao ◽  
Yezhou Liu ◽  
Bingbing Chen ◽  
Jeonghun Yun ◽  
Erxi Feng ◽  
...  
Keyword(s):  
Low Grade ◽  
Electrochemical System ◽  
Low Grade Heat
Sign in / Sign up

Export Citation Format

Share Document