Energy Saving Research on Multi-effect Evaporation Crystallization Process of Bittern Based on MVR and TVR Heat Pump Technology

Yang, De‐Ming; Leng, Bingqin; Li, Tao; Li, Ming

doi:10.11648/j.ajche.20200803.11

Cited by 9 publications

(2 citation statements)

References 22 publications

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“…TVR is a technology for recovering waste heat as useful energy through mechanical compression [ 21 ]. Figure 3 provides a simplified diagram of the alternative process model using TVR.…”

Section: Methodsmentioning

confidence: 99%

Design and Economic Assessment of Alternative Evaporation Processes for Poly-Lactic Acid Production

Lim

Cho

Son³

et al. 2022

Polymers

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In this work, alternative evaporation processes for PLA production were designed with economic assessment. The suggested processes are the multiple-effect evaporation (MEE) process and thermal vapor recompression (TVR)-assisted evaporation process. First, the MEE process can efficiently reuse waste heat by additional column installation, thereby reducing the steam energy consumption. The proposed MEE process involves five columns, and after the evaporation in each column, the waste heat of the emitted vapor is reused to heat steam in the reboiler of the next column. Second, the suggested TVR-assisted evaporation process utilizes an additional steam ejector and recovers waste heat from the emitted vapor by increasing the pressure using high-pressure driving steam at the steam ejector. Each alternative process was modeled to predict the steam energy consumption, and to determine the cost-optimal process; the total annualized cost (TAC) of each alternative process was calculated as evaluation criteria. In the simulation results, the alternative processes using MEE and TVR reduced the steam consumption by 71.36% and 89.97%, respectively, compared to the conventional process. As a result of economic assessment, the cost-optimal process is the alternative process using TVR and the TAC can be decreased by approximately 90%.

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“…TVR is a technology for recovering waste heat as useful energy through mechanical compression [ 21 ]. Figure 3 provides a simplified diagram of the alternative process model using TVR.…”

Section: Methodsmentioning

confidence: 99%

Design and Economic Assessment of Alternative Evaporation Processes for Poly-Lactic Acid Production

Lim

Cho

Son³

et al. 2022

Polymers

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“…Numerous studies have demonstrated that multi-effect evaporation reduces energy consumption by enhancing the steam economy. This is achieved utilizing the secondary steam generated by the preceding effect as the heat source for the subsequent effect [6].…”

mentioning

confidence: 99%

Model Based Optimization of Energy Consumption in Milk Evaporators

Tsochatzidi,

Arvanitidis,

Georgiadis

2024

Processes

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This work explores five falling film evaporator (FFE) simulation approaches combined with energy consumption minimization strategies, namely Mechanical Vapor Recompression and Thermal Vapor Recompression (MVR and TVR, respectively). Global system analysis and advanced dynamic optimization strategies are then investigated to minimize steam consumption, the cost of steam, and the total annualized cost and to maximize product yield. The results indicate that higher TVR discharge pressures, or MVR compression ratios, along with higher feed temperatures, enhance evaporation but increase operational costs. The most economical option includes three evaporator effects with TVR to achieve 50% product dry mass content. However, for a 35% dry mass content, MVR becomes cost-effective with an 11% reduction in unit electricity prices or a simultaneous 7% drop in electricity prices and a 5% increase in gas-based steam prices. Furthermore, switching from milk powder production to milk concentrates leads to an annual cost reduction ranging from 10.8 to 44%. Additionally, a forecasted 20% (or more) reduction in biomass-based steam cost can lead to lower annual expenditure compared with the nominal NG-based steam case. Regarding the total annualized cost, for a new plant design, optimization strategies lead to a 9–45% reduction in the total cost depending on the case under consideration.

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Analysis of a novel double-effect split mechanical vapor recompression systems for wastewater concentration

Shen

Tan

et al. 2022

Applied Thermal Engineering

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Energy Saving Research on Multi-effect Evaporation Crystallization Process of Bittern Based on MVR and TVR Heat Pump Technology

Cited by 9 publications

References 22 publications

Design and Economic Assessment of Alternative Evaporation Processes for Poly-Lactic Acid Production

Design and Economic Assessment of Alternative Evaporation Processes for Poly-Lactic Acid Production

Model Based Optimization of Energy Consumption in Milk Evaporators

Analysis of a novel double-effect split mechanical vapor recompression systems for wastewater concentration

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