Performance evaluation and optimization of humidification–dehumidification desalination system for low-grade waste heat energy application
- Title
- Performance evaluation and optimization of humidification–dehumidification desalination system for low-grade waste heat energy application
- Author
- 라비찬드란 산토쉬
- Keywords
- Humidification–dehumidification; Waste heat; Desalination; Seawater; Potable water
- Issue Date
- 2022-03
- Publisher
- ELSEVIER
- Citation
- DESALINATION, NO 526, Page. 115516-115516
- Abstract
- A humidification–dehumidification desalination system powered by low-grade waste heat energy (45 ◦C–70 ◦C)
was experimentally investigated. The seawater directly utilized as coolant (25 ◦C) for the dehumidifier was
preheated by latent heat recovery from the water vapor produced by the humidifier. The effect of key
performance-contributing factors such as the mass flow rate and temperature of the air and feed at the inlets of
the humidifier and dehumidifier were evaluated and optimized. For a constant volume, the effect of the hu-
midifier's surface area was evaluated comparatively considering different novel packing materials such as tri-
pack rings, pall rings (diameter = 16 mm and 25 mm), saddle rings, and snowflake rings. It was determined
that compared to other factors, air-related and water-related parameters influenced the humidifier and dehu-
midifier performance respectively. Maximum freshwater productivity of 1398 mL/h was achieved with 16 mm
pall ring humidifier, owing to its improved wet area (188,000 m2/m3) under optimal conditions of air flow rate,
feed flow rate, humidifier air inlet temperature, humidifier, and dehumidifier water inlet temperatures of 3.5 kg/
min, 0.9 L/min, 70 ◦C, 55 ◦C, and 25 ◦C, respectively, with a dual-fluid preheating mechanism. Detailed chemical
analysis revealed that the generated freshwater is potable.
- URI
- https://www.sciencedirect.com/science/article/pii/S0011916421005877https://repository.hanyang.ac.kr/handle/20.500.11754/170802
- ISSN
- 0011-9164
- DOI
- 10.1016/j.desal.2021.115516
- Appears in Collections:
- RESEARCH INSTITUTE[E](부설연구소) > RESEARCH INSTITUTE OF ENGINEERING & TECHNOLOGY(공학기술연구소) > Articles
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