scholarly journals Porous evaporators with special wettability for low-grade heat-driven water desalination

2021 ◽  
Author(s):  
Zhigao Zhu ◽  
Ying Xu ◽  
Yifei Luo ◽  
Wei Wang ◽  
Xiaodong Chen
Keyword(s):  
Robust Stability ◽  
Water Desalination ◽  
Low Grade ◽  
Porous Interface ◽  
Low Grade Heat

Design of novel special wettable evaporators with robust stability for high-performances porous interface distillation.

Experimental adsorption water desalination system utilizing activated clay for low grade heat source applications

2021 ◽  
Vol 43 ◽  
pp. 103219
Author(s):  
Ehab S. Ali ◽  
Ahmed A. Askalany ◽  
K. Harby ◽  
Mohamed Refaat Diab ◽  
Bahgat R.M. Hussein ◽  
...  
Keyword(s):  
Heat Source ◽  
Water Desalination ◽  
Low Grade ◽  
Experimental Adsorption ◽  
Low Grade Heat

Theoretical Analysis of a Water Desalination System Using Low Grade Solar Heat

2004 ◽  
Vol 126 (2) ◽  
pp. 774-780 ◽  
Author(s):  
S. Al-Kharabsheh ◽  
D. Yogi Goswami
Keyword(s):  
Theoretical Analysis ◽  
Heating System ◽  
Operating Conditions ◽  
Water Desalination ◽  
Low Grade ◽  
Solar Heat ◽  
Evaporation And Condensation ◽  
Condenser Temperature ◽  
Low Grade Heat ◽  
Natural Means

Theoretical analysis of a solar desalination system utilizing an innovative new concept, which uses low-grade solar heat, is presented. The system utilizes natural means of gravity and atmospheric pressure to create a vacuum, under which liquid can be evaporated at much lower temperatures and with less energy than conventional techniques. The uniqueness of the system is in the way natural forces are used to create vacuum conditions and its incorporation in a single system design where evaporation and condensation take place at appropriate locations without any energy input other than low grade heat. The system consists of solar heating system, an evaporator, a condenser, and injection, withdrawal, and discharge pipes. The effect of various operating conditions, namely, withdrawal rate, depth of water body, temperature of the heat source, and condenser temperature were studied. Numerical simulations show that the proposed system may have distillation efficiencies as high as 90% or more. Vacuum equivalent to 3.7 kPa (abs) or less can be created depending on the ambient temperature at which condensation will take place.

Inherently safe pool-type reactor as a generator of low-grade heat for district heating, air conditioning and salt water desalination

1997 ◽  
Vol 173 (1-3) ◽  
pp. 167-174 ◽  
Author(s):  
E.O. Adamov ◽  
Yu.M. Cherkashov ◽  
A.A. Romenkov ◽  
V.I. Mikhan ◽  
V.I. Semenikhin
Keyword(s):  
Air Conditioning ◽  
Salt Water ◽  
District Heating ◽  
Water Desalination ◽  
Low Grade ◽  
Type Reactor ◽  
Low Grade Heat ◽  
Pool Type

Theoretical Analysis of a Water Desalination System Using Low Grade Solar Heat

Solar Energy ◽  
2003 ◽  
Author(s):  
S. Al-Kharabsheh ◽  
D. Yogi Goswami
Keyword(s):  
Theoretical Analysis ◽  
Heating System ◽  
Operating Conditions ◽  
Water Desalination ◽  
Low Grade ◽  
Solar Heat ◽  
Evaporation And Condensation ◽  
Condenser Temperature ◽  
Low Grade Heat ◽  
Natural Means

Theoretical analysis of a solar desalination system utilizing an innovative new concept, which uses low-grade solar heat, is presented. The system utilizes natural means of gravity and atmospheric pressure to create a vacuum, under which liquid can be evaporated at much lower temperatures and with less energy than conventional techniques. The uniqueness of the system is in the way natural forces are used to create vacuum conditions and its incorporation in a single system design where evaporation and condensation take place at appropriate locations without any energy input other than low grade heat. The system consists of solar heating system, an evaporator, a condenser, and injection, withdrawal, and discharge pipes. The effect of various operating conditions, namely, withdrawal rate, depth of water body, temperature of the heat source, and condenser temperature were studied. Numerical simulations show that the proposed system may have distillation efficiencies as high as 90% or more. Vacuum equivalent to 3.7 kPa (abs) or less can be created depending on the ambient temperature at which condensation will take place.

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
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