Globally optimal design of kettle vaporizers

Sales, Guilherme de M.; Queiroz, Eduardo M.; Nahes, André L.M.; Bagajewicz, Miguel J.; Costa, André L.H.

doi:10.1016/j.tsep.2021.100962

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…The heaters use saturated steam, which condenses on the shell side 47 . However, the procedure is flexible: For example, other types of HEXs, such as gasketed‐plate HEXs 48 or heaters with phase change 49 can be considered as options in the design of the equipment. Moreover, one can determine the cheapest option among different types of exchangers.…”

Section: Hen Synthesis and Hex Designmentioning

confidence: 99%

Globally optimal simultaneous heat exchanger network synthesis and basic heat exchanger design

Oliva,

Nahes,

Lemos

et al. 2024

AIChE Journal

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In this article, we extend a previously developed globally optimal enumeration methodology for the synthesis of heat exchanger networks (HENs) to include the basic design of heat exchangers (HEXs). The method addresses together all trade‐offs between network structure, energy usage, and the basic design of the HEXs. Without loss of generality, we focus on shell‐and‐tube HEXs. Unlike previous approaches, such as Pinch Analysis, Metaheuristic methods, or Mathematical Programming, our procedure guarantees global optimality. The procedure is not iterative and does not present any convergence challenges. We enumerate HEN structures using a mixed‐integer linear programming method and we use Set Trimming followed by sorting for the HEX design. In addition, because some network structures are incompatible with single shell exchangers, we use multiple shell exchangers in series. The comparison of the results of the proposed approach with solutions obtained using two alternative methods extracted from the literature indicates that considerable cost reductions may be obtained.

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Section: Hen Synthesis and Hex Designmentioning

confidence: 99%

Globally optimal simultaneous heat exchanger network synthesis and basic heat exchanger design

Oliva,

Nahes,

Lemos

et al. 2024

AIChE Journal

Self Cite

View full text Add to dashboard Cite

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Configuration of Organic Rankine Cycles for Geothermal Applications: An Industrial Perspective

Pettinari,

Dago,

Frate

et al. 2024

Journal of Engineering for Gas Turbines and Power

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Geothermal resources represent a valuable option to reduce fossil fuel-based power production because they feature an unmatched capacity factor among other Renewable Energy Sources (RES). Geothermal resource availability reduces with the temperature. Therefore, developing cost-effective solutions to exploit low-temperature geothermal energy is mandatory to expand technology utilisation. The standard solution for converting low-temperature thermal sources into power is Organic Rankine Cycles (ORC). ORC basic layout (subcritical) is well-known, but the more advanced alternatives, such as transcritical and two-pressure level cycles, are much less widespread, and it is unclear whether the higher efficiency justifies the higher capital cost. The paper focuses on the exploitation with ORC of geothermal resources (hot water) with a temperature lower than 200°C and mass flow rates between 200 and 1400 m3/h for a target power production ranging from 3 to 30 MW. The paper compares three ORC layouts, subcritical, transcritical and two pressure-level, from thermodynamic and economic points of view to map the most cost-effective solutions in the investigated size ranges. The techno-economic comparison considers the impact of the operating conditions and fluid on the machine's expected performance and the heat exchangers' size. As expected, more complicated layouts yield higher conversion efficiencies, with the two pressure-level cycles achieving the highest power output for the same geothermal source conditions. However, the economic analysis showed that the most efficient solutions are not always preferable when considering the cost-efficiency trade-off.

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Globally optimal design of kettle vaporizers

Cited by 2 publications

References 21 publications

Globally optimal simultaneous heat exchanger network synthesis and basic heat exchanger design

Globally optimal simultaneous heat exchanger network synthesis and basic heat exchanger design

Configuration of Organic Rankine Cycles for Geothermal Applications: An Industrial Perspective

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