Indirect mechanical heat pump assisted humidification‐dehumidification desalination systems

Rostamzadeh, Hadi

doi:10.1002/er.6822

Cited by 6 publications

(4 citation statements)

References 65 publications

(65 reference statements)

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“…As it mentioned in section 3.2 the feed water enters into the HDH from condensation chamber to decrease the dehumidifier tubes temperature for higher condensation of vapor while at the same time it use the latent heat of the vaporization of vapor to preheat the feed temperature. The entering temperature of feed water is almost equal to seawater in the range of 15-25°C [146] . This temperature range is not critical for most pathogens, including those leading to previous outbreaks/pandemics and those mentioned as high risk of starting another epidemic/pandemic.…”

Section: Solar Stills and Solar Disinfection In High Altitude Against...mentioning

confidence: 99%

Solar desalination/purification (solar stills, humidification-dehumidification, solar disinfection) in high altitude during COVID19: Insights of gastrointestinal manifestations and systems’ mechanism

Parsa

Norozpour

Elsheikh

et al. 2023

Journal of Hazardous Materials Advances

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Section: Solar Stills and Solar Disinfection In High Altitude Against...mentioning

confidence: 99%

Solar desalination/purification (solar stills, humidification-dehumidification, solar disinfection) in high altitude during COVID19: Insights of gastrointestinal manifestations and systems’ mechanism

Parsa

Norozpour

Elsheikh

et al. 2023

Journal of Hazardous Materials Advances

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“…To calculate the thermophysical and thermodynamic properties of seawater, add-on library functions available in the software are used. In addition, to conduct an economic analysis of the heat exchangers and dehumidifiers, the overall heat transfer coefficient of each heat exchanger is needed, which is calculated based on the same approach explained in our previous works [9,21]. For the RHX and heater, a shell-and-tube heat exchanger is designed, while for the dehumidifier, a compact heat exchanger, model "fc_tubes_sCF-88-10Jb", is used.…”

Section: Thermodynamic Assumptions and Input Datamentioning

confidence: 99%

“…In this study, the same approach and assumptions that are used in our previous investigations to design a shell-and-tube or a compact one-air-side heat exchanger are used here [9,21]. The only difference is in the use of different geometrical specifications to satisfy the design criteria.…”

Section: Symbolsmentioning

confidence: 99%

Seawater Desalination via Waste Heat Recovery from Generator of Wind Turbines: How Economical Is It to Use a Hybrid HDH-RO Unit?

et al. 2021

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Over recent years, the concept of waste heat recovery from the generators of wind turbines for driving a thermal-driven desalination system was introduced, and its advantages were highlighted. However, any selection of a bottoming thermal-driven desalination system among different existing technologies should be taken under consideration before making an ultimate recommendation. Unfortunately, no comprehensive comparison is available in the literature to compare the performance as well as the cost aspects of using the waste thermal energy of the generator of a wind turbine for desalinating seawater, comparing them with those of a layout where the power of the wind turbine is directly supplied to a mechanically driven desalination system for the same amount of drinkable water production. This study aims at analyzing the economic aspects of waste heat recovery from the generators of wind turbines for seawater desalination via the humidification-dehumidification (HDH) approach, versus the reverse osmosis (RO) unit. For this purpose, a closed-air water-heater HDH unit, directly coupled with a RO unit (called a hybrid HDH-RO unit) is employed, in which thermal energy is provided by the heat dissipating from the generator of the wind turbine while its power is supplied directly by the wind turbine. The energetic and exergetic performance, along with the cost aspects of a hybrid HDH-RO unit driven by the wind turbine, are compared with those of a solo RO unit. The results of the study were extended for six different types of wind turbines, and we concluded that the unit cost associated with the freshwater produced by the waste heat recovery approach is astronomically higher than that of the solo RO system for all wind turbine models, and hence is not practically feasible. It was found that more power can be recovered from the discarded brine from the solo RO unit than the hybrid HDH-RO unit. In addition, the solo RO desalination system, working directly with the power of the wind turbine, has a less complex configuration, and hence its investment cost rate is significantly lower than that needed for setting up an HDH-RO unit. At high wind speeds, however, the cost penalty associated with the freshwater produced by the HDH-RO unit decreases, but it is still huge. Among all screened wind turbines, the GW-136/4.8 is most appealing in terms of greater power generation, but its investment cost rate is the highest among all models due to its high rated power value. However, the freshwater unit cost of the GW-136/4.8 is significantly lower than the values obtained for other models. Finally, the two locations of Manjil and Zabol are selected as a benchmark and the results of the simulation are extended for these locations.

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“…They proved this technique reduces the customers' cost by 40% 8 . Using the indirect heat pump in the HDH process has been introduced in 9 and thermodynamic analysis has been analyzed. Jradi et al studied an integrated thermoelectric‐photovoltaic system for air dehumidification and fresh water production for residential areas 10 …”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on a standalone battery‐less single‐phase photovoltaic desalination system

Abbasi

Ebadi

Khalili

2022

Intl J of Energy Research

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Summary This paper investigates the performance of a battery‐less photovoltaic desalination system. Lead‐acid batteries have been removed from the system due to adverse environmental effects, a shorter lifespan, and to reduce the total cost. Due to the lack of a storage device, starting a high current load like an AC compressor leads to electrical instability of the system. The proposed solution for this problem includes using a combination of two high‐capacity electrolyte capacitors, one at the PV terminals and the other at the single‐phase inverter input terminals. Suitable resistive starters have also been sized and added to the circuit to limit the inrush current of capacitors at the energization moment. An analytical procedure has been introduced to design the optimal size of the capacitors and the starter resistors. The results of a 1.1 kW test system show that using two capacitors, 12 000 μf/ 350 Volts as C1 and 330 000 μf/ 50 Volts as C2, at the same time, can handle a starting current of 12 Amps for the starting period of 100 ms of the AC compressor. The maximum voltage drop on the capacitors will be 48 and 17%, which are in the accepted range, and no instability happens.

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Indirect mechanical heat pump assisted humidification‐dehumidification desalination systems

Cited by 6 publications

References 65 publications

Solar desalination/purification (solar stills, humidification-dehumidification, solar disinfection) in high altitude during COVID19: Insights of gastrointestinal manifestations and systems’ mechanism

Solar desalination/purification (solar stills, humidification-dehumidification, solar disinfection) in high altitude during COVID19: Insights of gastrointestinal manifestations and systems’ mechanism

Seawater Desalination via Waste Heat Recovery from Generator of Wind Turbines: How Economical Is It to Use a Hybrid HDH-RO Unit?

Experimental investigation on a standalone battery‐less single‐phase photovoltaic desalination system

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