Study on low pressure evaporation of fresh water generation system model

Chung, Hanshik; Wibowo, Supriyanto; Fajar, Berkah; Shin, Yonghan; Jeong, Hyomin

doi:10.1007/s12206-011-1102-8

Cited by 17 publications

(5 citation statements)

References 7 publications

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“…In order to verify the results obtained, they were compared with some experimental and theoretical results available in the literature. As shown in Figure 3A, the effect of the degree of superheat or the temperature difference in vacuum chamber is in good agreement with the experimental results obtained by Chung et al 44 The results are compared at the same range of temperature difference although there is a difference in capacity of the two plants considered. Figure 3B compares the effect of vacuum pressure obtained by the current study and the results reached by Thadela et al2 Once more, a good agreement is found.…”

Section: Model Validationsupporting

confidence: 88%

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A novel vacuum wastewater treatment plant integrated with a solar absorption system

Saleh

Al‐Nimr

2019

Int J Energy Res

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Summary In this investigation, a novel use of the solar absorption refrigeration systems was introduced by using it to enhance the operation of vacuum wastewater treatment plant. Wastewater treatment systems require a source of heat for evaporation, a cooling section for condensation and a mean of evacuation to facilitate evaporation. The solar absorption system can take over the first two tasks. Among the commercially available vacuum evaporators, one was selected and modified by replacing the conventional heat pump with the solar absorption system. Two validated mathematical models available in the literature, one for solar absorption subsystem and one for vacuum evaporation subsystem, were integrated together to perform the analysis. The impacts of solar absorption subsystem parameters along with vacuum evaporator subsystem parameters on the overall performance were investigated using the developed program. System performance was evaluated in terms of evaporation rate and condensate rate production. It was found that the degree of superheat had the greatest impact on the rate of evaporation. At low levels of supply temperature to the vacuum chamber, using only heat provided by the absorption system, the evaporation rate exceeded 60 kg/h. If the hot water was further heated by passing through the solar collector storage tank, the evaporation rate exceeded 200 kg/h.

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Section: Model Validationsupporting

confidence: 88%

“…Validation of the developed model by comparison between present study and (A) Ref. , (B) Ref. , (C) Ref.…”

Section: Model Validationmentioning

confidence: 78%

A novel vacuum wastewater treatment plant integrated with a solar absorption system

Saleh

Al‐Nimr

2019

Int J Energy Res

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“…ey have mentioned the potential growth of the RO system might help future India's sustainability. Chung et al [22] have pointed out the necessity of the desalination process. ey have stated that while only 1% of the Earth is covered with freshwater, the remaining left 97% is covered with saltwater.…”

Section: Literature Reviewmentioning

confidence: 99%

Selection of Desalination System for Commercial Vessels by Implementing Improved Intuitionistic Fuzzy TOPSIS Method

Nazligul

Yazır

Şahin

2022

Mathematical Problems in Engineering

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The process of desalination of seawater on commercial vessels is a vital event in the daily life of the crew. As a result of the rapid developments in ballast water treatment operations, the question of whether ballast water treatment systems can be used as the main desalination system in the daily life of the crew on commercial vessels has been raised. This study introduces the current desalination systems on commercial vessels and their evaluation criteria. According to the literature and our professional industrial research, there are three most suitable alternatives such as “freshwater generator,” “reverse osmosis method,” and “attaching additional membrane filter to mechanical and ultraviolet (UV) ballast water treatment system.” Similarly, the evaluation criteria are determined as “installation cost of the system,” “operational cost of the system,” “risk of the system polluting the environment,” “risk of the system harming the human health,” “ease of repair and maintenance of the system,” “ease of use of the system,” and “ease of installing the system on the ship.” Due to the need for field expertise, we conducted several rounds of expert consultations. The novelty of this study is twofold. First, we improved the intuitionistic fuzzy TOPSIS (IF-TOPSIS) method by extending an expert prioritization technique. We also used an intuitionistic fuzzy scale for the expert weights. Second, as far as we know, this is the first study that employs an improved IF-TOPSIS method for desalination systems on commercial vessels. Moreover, we compared the proposed method and other methods to analyze the results. Results show that “freshwater generator” is more promising than “attaching additional membrane filter to mechanical and UV ballast water treatment system” that is prior to “reverse osmosis method.” This study helps the users and authorities understand the evaluation and select the desalination systems.

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“…It is operated at low pressure (50 mm Hg) to reduce the partial pressure of water within the gas phase and promote water removal at a temperature of 50 o C (Chung, 2012), thus minimising decomposition or alteration of heat-sensitive materials. The typical heat transfer coefficient of 3kW/m 2 .K is assumed for condensing steam, which is a common heating medium (Seader, 2011).…”

Section: Process Descriptionmentioning

confidence: 99%

Techno-economic assessment of scale-up of bio-flocculant extraction and production by using okra as biomass feedstock

Lee

Chong

Binner

et al. 2018

Chemical Engineering Research and Design

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This paper reports a techno-economic assessment for industrial scale bio-flocculant production with okra as biomass feedstock. The sludge dewatering ability of the bio-flocculant was evaluated prior to economic analysis. Several optimisation strategies were investigated in order to lower the bio-flocculant production cost. The results showed that continuous mode microwave extraction was more economically beneficial than conventional extraction in batch and continuous modes. Sensitivity analysis revealed that the production cost was significantly affected by annual production and extract yield, and moderately influenced by raw material price. The optimised scheme for bio-flocculant production was continuous mode microwave extraction at 90˚C, a residence time of 10 minutes, a water loading of 3.5 w/w and production rate of 220 tonnes per year. The economic assessment showed that the gross margin was positive, return on investment was in the expected range of 20 to 30% and payback time was within 5 years.

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Study on low pressure evaporation of fresh water generation system model

Cited by 17 publications

References 7 publications

A novel vacuum wastewater treatment plant integrated with a solar absorption system

A novel vacuum wastewater treatment plant integrated with a solar absorption system

Selection of Desalination System for Commercial Vessels by Implementing Improved Intuitionistic Fuzzy TOPSIS Method

Techno-economic assessment of scale-up of bio-flocculant extraction and production by using okra as biomass feedstock

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