Design and analysis of LNG cold energy cascade utilization system integrating light hydrocarbon separation, organic Rankine cycle and direct cooling

Pan, Jie; Li, Mofan; Li, Ran; Tang, Linghong; Bai, Junhua

doi:10.1016/j.applthermaleng.2022.118672

Cited by 32 publications

(5 citation statements)

References 42 publications

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“…Following this operative scheme, the system is able to deliver 9.4 MW of space cooling, 6.5 MW of sub-zero refrigeration and 2.2 MW of net power for a regasification capacity of one million tons of LNG per year. In [27], the LNG exergy recovery was explored by proposing a cascade system in which the separation of light hydrocarbon, the power generation by Organic Rankine Cycles and the direct cooling of a data centre, was achieved. In [28] a novel plant configuration able to provide direct and indirect district cooling was investigated.…”

Section: State Of the Artmentioning

confidence: 99%

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Bruno,

Ferraro,

Bevilacqua

et al. 2024

Preprint

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Despite being stored at 113 K and atmospheric pressure, LNG cold potential is not exploited to reduce green ships’ energy needs. An innovative system based on three Organic Ranking Cycles integrated into the regasification equipment is proposed to produce additional power and recover cooling energy from condensers. A first-law analysis identified ethylene and ethane as suitable working fluids for the first and the second ORC making available freshwater and ice. Propane, ammonia and propylene could be arbitrarily employed in the third ORC for air-conditioning. An environmental analysis that combines exergy efficiency, ecological indices and hazard aspects for marine environment and ship’s passengers, indicated propylene as safer and more environmentally friendly. The exergy analysis confirms more than 20% of the LNG potential can be recovered from every cycle to produce a net clean power of 76 kW, whereas 270 kW can be saved by recovering condensers' cooling power to satisfy some ship needs. Assuming the sailing mode, a limitation of 162 kg in LNG consumptions was determined, avoiding the emission of 1584 kg of CO2 per day. Marine thermal pollution is reduced by 3.5 times by recovering the working fluids' condensation heat for the LNG pre-heating.

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Section: State Of the Artmentioning

confidence: 99%

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Bruno,

Ferraro,

Bevilacqua

et al. 2024

Preprint

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“…However, the process of gas conditioning requires high energy consumption, as the refrigeration cycles operate primarily on electricity. Under such conditions, cold energy from LNG can be utilized as a refrigeration medium [99].…”

Section: Natural Gas Liquid Recoverymentioning

confidence: 99%

Recent Progress in Cold Utilization of Liquefied Natural Gas

Shingan

Parthasarthy

2023

Chem Eng & Technol

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Liquefaction of natural gas occurs at –162 °C and atmospheric pressure for transporting it over long distances. In the customer's segment, the liquefied natural gas is regasified before distribution. Around 830 kJ kg−1 energy is required for the production of liquefied natural gas and is often saved as cold energy, which can be reused by regasification terminals. Hence, for the past few years, cold energy utilization has been an important topic of research in the energy sector. The different techniques to utilize cold energy for power generation, air fractionation, extraction of natural gas liquids, refrigeration systems, desalination, and dry ice manufacturing are reviewed and discussed. Applying the cold utilization of LNG technique in these systems can help to improve efficiency and decrease operating costs effectively.

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“…Light hydrocarbon separation is one of the important processes in the chemical industry [1][2][3][4][5][6]. The separated and purified light hydrocarbon compounds are important energy fuels and chemical raw materials, which are widely used in the preparation of synthetic fibers, synthetic rubbers, synthetic plastics, and organic compounds.…”

Section: Introductionmentioning

confidence: 99%

Porous Metal–Organic Frameworks for Light Hydrocarbon Separation

Gao,

Yan,

et al. 2023

Molecules

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The separation of light hydrocarbon compounds is an important process in the chemical industry. Currently, its separation methods mainly include distillation, membrane separation, and physical adsorption. However, these traditional methods or materials have some drawbacks and disadvantages, such as expensive equipment costs and high energy consumption, poor selectivity, low separation ratios, and separation efficiencies. Therefore, it is important to develop novel separation materials for light hydrocarbon separation. As a new type of organic–inorganic hybrid crystalline material, metal–organic frameworks (MOFs) are promising materials for light hydrocarbon separation due to their designability of structure and easy modulation of function. This review provides an overview of recent advances in the design, synthesis, and application of MOFs for light hydrocarbon separation in recent years, with a focus on the separation of alkane, alkene, and alkyne. We discuss strategies for improving the adsorption selectivity and capacity of MOFs, including pore size limitation, physical adsorption, and chemisorption. In addition, we discuss the advantages/disadvantages, challenges, and prospects of MOFs in the separation of light hydrocarbon.

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Design and analysis of LNG cold energy cascade utilization system integrating light hydrocarbon separation, organic Rankine cycle and direct cooling

Cited by 32 publications

References 42 publications

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Recent Progress in Cold Utilization of Liquefied Natural Gas

Porous Metal–Organic Frameworks for Light Hydrocarbon Separation

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