Water Desalination Conference in The Arab Countries
開催地
和文:
英文:
Riyadh - Saudi Arabia
アブストラクト
A combination of solar energy and seawater desalination is a highly attractive next generation
concept. The solar energy can be converted to electricity directly using solar cell or concentrated
thermal energy to create steam for combined power generation and thermal desalination. It is
practically preferable to use concentrated thermal energy in considering storage for 24 hours
operation of the desalination plant. However, a number of further works need to improve cost of
construction, ease of maintenance and reliability of operation.
A typical solar thermal energy desalination plant consists of concentrating solar power collector, heat
medium circulation loop for thermal storage, steam generator with auxiliary fuel, steam turbine for
power generation and thermal desalination plant and/or RO type desalination plant. The system is
relatively complicated and resulting higher construction cost and difficulty of maintenance.
This paper suggests new technology to produce electrical power to raise the operating efficiency of
solar desalination systems. In this configuration, solar energy is collected and concentrated in the
solar thermal collector and used to generate steam, which is used as the heat source for the thermal
desalination unit. The vaporization system used in this configuration can concurrently generate both
steam and electricity without the need for a steam turbine generator. The electricity generated is used
for operating the thermal desalination unit and the RO desalination unit. This system has no moving
parts, is easy to operate and is highly reliable.
In addition, if a thermal storage system is used (such as a molten salt system), 24 hours operation can
be achieved. Furthermore, the combination of this technology with a tri-hybrid NF/RO/MED is
expected to be more efficient in the utilization of heat and electric power and is considered to be one
of the most suitable systems for the next generation seawater desalination.
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