Energy efficient supercritical water desalination using a high-temperature heat pump: A zero liquid discharge desalination

Sharan, Prashant; McTigue, Joshua D.; Yoon, Tae Jun; Currier, Robert; Findikoglu, Alp Tugrul

doi:10.1016/j.desal.2021.115020

Energy efficient supercritical water desalination using a high-temperature heat pump: A zero liquid discharge desalination

Journal Article · Tue Jun 01 00:00:00 EDT 2021 · Desalination

DOI:https://doi.org/10.1016/j.desal.2021.115020· OSTI ID:1782805

Sharan, Prashant; ; Yoon, Tae Jun; Currier, Robert; Findikoglu, Alp Tugrul

Supercritical water desalination (SCWD) is zero liquid discharge technology that can potentially control the solubility of different electrolytes. However, SCWD is an energy-intensive process and requires high-quality thermal heat (> 450 °C). This study proposes the integration of a high-temperature heat pump to reduce the SCWD energy requirement. The integrated system energy consumption improves by 36% for 3.5% feed concentration and 14% for 20% feed, and the distillate cost reduces by 15% and 10%. Another benefit of the proposed integration is the system can be operated using only electricity as a heat source, as is the case with commonly used high-recovery thermal desalination technology. The integrated SCWD-heat pump system shows superior performance compared to the commercially used brine concentrator and crystallizer system. It is approximately 20% more energy-efficient for 25% feed concentration and 8% cheaper. Hence, the integrated SCWD-heat pump has the potential to outperform the pre-existing high-recovery desalination technology.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1782805

Alternate ID(s):: OSTI ID: 1804366
OSTI ID: 1815272

Report Number(s):: NREL/JA-5700-79944; MainId:39162; UUID:1f2f8f04-845b-44a6-878c-9268d6ff60b8; MainAdminID:22446

Journal Information:: Desalination, Journal Name: Desalination Vol. 506; ISSN 0011-9164

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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