Low-temperature vapour compression and multi-effect distillation of seawater. Effects of design on operation and economics

Matz, R.; Zimerman, Z.

doi:10.1016/0011-9164(85)85009-8

Cited by 31 publications

(6 citation statements)

References 2 publications

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“…A range of 2-4°C is reported for the temperature difference between the hot and cold streams in the feed preheaters. Matz and Zimerman (1985) reported similar performance and economic data for single-and two-effect vapour compression systems. The system operates at capacities between 50 and 1000 m d\, low top brine temperature between 50 and 70°C, and specific power consumption slightly below 10 kWh m\.…”

Section: Introductionmentioning

confidence: 79%

Analysis of mechanical vapour compression desalination process

Ettouney¹,

El‐Dessouky²,

Al‐Roumi³

1999

Int. J. Energy Res.

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SUMMARYCharacteristics of the single-effect mechanical vapour-compression (MVC) are analysed as a function of the system design and operating parameters. The analysis focuses on prediction of the specific power consumption for the vapour compressor and the specific heat transfer areas for the evaporator/condenser unit and the plate-type feed preheaters. The mathematical model includes material and energy balance equations as well as a set of correlations for evaluation of the thermophysical properties and the heat transfer coefficients. The correlations are dependent on the transport properties of the flowing streams, i.e. temperature, concentration, and velocity. In addition, the model considers the effects of the boiling point elevation and the pressure losses in the demister. Results show decrease in the specific power consumption and the specific heat transfer area of the evaporator/condenser at higher top brine temperatures. On the other hand, the specific power consumption decreases at low-temperature differences between the boiling brine and steam condensate, while the specific heat transfer area increases. Model predictions are found consistent with the available industrial data. Finally, comparison of the performance of the MVC system and the single-effect thermal vapour compression (TVC) is made as a function of design and operating parameters. Although, the results show comparable performance, choice between the two systems should take into consideration other operational parameters.

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Section: Introductionmentioning

confidence: 79%

Analysis of mechanical vapour compression desalination process

Ettouney¹,

El‐Dessouky²,

Al‐Roumi³

1999

Int. J. Energy Res.

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“…The inception of the commercial mechanical vapor compression (MVC) units dates back to the early 1970s [4,5]. MVC units have been evolved to become a mature technology over the past decades.…”

Section: Introductionmentioning

confidence: 99%

An optimization model for a mechanical vapor compression desalination plant driven by a wind/PV hybrid system

et al. 2011

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“…The thermal distillation method is actually a nonvolatile solute and volatile solvent separation process, and thermal distillation is the most commonly used and well‐developed method. The concept of a thermal distillation system based on vapor compression heat pump theory was first presented in the early 1980s . This evaporation method, called mechanical vapor compression (MVC), employs steam heated in a high‐temperature gas compressor.…”

Section: Introductionmentioning

confidence: 99%

“…The concept of a thermal distillation system based on vapor compression heat pump theory was first presented in the early 1980s. [7][8][9] This evaporation method, called mechanical vapor compression (MVC), employs steam heated in a high-temperature gas compressor. Veza 10 studied the capacity of a 500 m 3 /d MVC unit and summarized the design parameters and operational features of the system.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental analysis of a vapor compression heat pump combined with double‐stage forced‐circulation evaporators

Lin

Qin

Jia

2018

Energy Science & Engineering

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Thermal distillation systems are widely used in the evaporation concentration industry, and the steam is the heating medium of these systems. However, due to the low density of the steam, the volume of equipment and piping is large. Especially in the mechanical vapor recompression (MVR) systems, high impeller exit line speed often occurs in steam compressors, which will cause compressor blades failure easily. In order to solve this problem, an experimental system called a vapor compression heat pump combined with double‐stage forced‐circulation evaporators (VCHP‐FCE) was developed. The system incorporates the refrigerant, R‐22, which offers an energy recycling benefit. R22 is used as the heat resource and has a higher energy‐carrying ability per unit volume than steam. The advantages relative to traditional thermal distillation system include a smaller device size, compact structure and no need for steam resource. Experimental facilities were established to analyze the thermal parameters and performance of the proposed system. The preheating temperature, which was correlated with the refrigerant's evaporation temperature, was the decisive factor affecting the system. A positive correlation was identified between the system's water production rate and the preheating temperature. Based on the first and second laws of thermodynamics, we analyzed the energy balance and the exergy loss of the system. The proportion of energy loss in each unit and the complete system exergy efficiency as a function of the environmental temperature were determined, which together indicated directions for system improvement.

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Low-temperature vapour compression and multi-effect distillation of seawater. Effects of design on operation and economics

Cited by 31 publications

References 2 publications

Analysis of mechanical vapour compression desalination process

Analysis of mechanical vapour compression desalination process

An optimization model for a mechanical vapor compression desalination plant driven by a wind/PV hybrid system

Design and experimental analysis of a vapor compression heat pump combined with double‐stage forced‐circulation evaporators

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