Natural circulation solar thermal system for water disinfection

Manfrida, Giampaolo; Petela, Karolina; Rossi, Federico

doi:10.1016/j.energy.2017.09.132

Cited by 15 publications

(4 citation statements)

References 18 publications

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“…The average costs are within 2.24 and 6.80 €/m 3 . According to the authors in [11], if a flow-through pasteurisation system produced 200 L/m 2 /day, the treatment cost could be as low as 1 $/m 3 .…”

Section: Results-exergo-economic Analysismentioning

confidence: 99%

“…The average costs are within 2.24 and 6.80 €/m 3 . According to the authors in [11], if a flow- The weighted arithmetic mean of the specific costs of purified water for each location are reported in row 6 of Table 3; the weights are taken as the amounts of treated water produced in a month. In other words, these are the values of the annual average specific cost of treated water (in €/m 3 ).…”

Section: Results-exergo-economic Analysismentioning

confidence: 99%

“…The system configuration is changed from closed to In the proposed system [11], raw water flows from the supply tank (C) to the treated water tank (D) with no use of electricity: the driving force is provided by the variation of water density due to its heating in the solar collector (A). A set-point temperature of water is defined and fixed to 85 • C: in these conditions, following [12] we assume that disinfection can take place in few seconds, so that the residence time inside the circuit is always adequate.…”

Section: Introductionmentioning

confidence: 99%

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Exergo-Economic Evaluation of the Cost for Solar Thermal Depuration of Water

et al. 2017

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Abstract:A detailed assessment of the cumulative cost of clean water production by a natural circulation solar thermal system is presented. The system is designed and sized for sufficient residence time for pasteurisation, in a buoyancy-driven self-compensating circuit. Since it does not consume electricity, it is suitable for developing countries or emergency locations with safe drinking water issues. The principles for design and off-design simulations are explained and discussed. The simulations were performed for seven different locations, representing variable climate conditions in selected regions where there is an evident need for safe water. The results include an exergy and exergo-economic analysis. The production capacity reaches typically from 0.04 to 0.1 m 3 /day per m 2 of solar collector depending on the location. The annual cost of water production ranges between 2.2 and 6.8 €/m 3 making the proposed system fairly competitive; the energy-and price-performance of the system is compared to a reverse osmosis/photovoltaic system, representing a high-tech alternative for the purpose of water purification.

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Section: Results-exergo-economic Analysismentioning

confidence: 99%

Section: Results-exergo-economic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exergo-Economic Evaluation of the Cost for Solar Thermal Depuration of Water

et al. 2017

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“…A solar system for disinfection of water, to be applied in developing countries and/or long-term emergencies was presented. The system used commercial solar thermal collectors arranged in a selfcompensating natural circulation system, using no electricity and sized for adequate residence time for disinfection by pasteurization (Manfrida et al, 2017). A 5-L reactor was designed and used to enhance the sunlight/visible-lightdriven photocatalytic disinfection efficiency towards gramnegative bacterium (E. coli).…”

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confidence: 99%