Finite time thermodynamic analysis of small alpha-type Stirling engine in non-ideal polytropic conditions for recovery of LNG cryogenic exergy

Buliński, Zbigniew; Szczygieł, Ireneusz; Krysinski, Tomasz; Stanek, Wojciech; Czarnowska, Lucyna; Gładysz, Paweł; Kabaj, Adam

doi:10.1016/j.energy.2017.10.026

Cited by 13 publications

(3 citation statements)

References 18 publications

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“…One of the important factors the designing of PHP is the number of turns and it has been investigated in our experiment. Through this experiment, the 8-and 48-turn heat transfer performance of helium PHP is examined and almost combined through its operating mechanism [8,9]. The 0.5 mm and 0.8 mm inner and outer diameter stainless steel capillary tubes were selected and the unit satisfied the equation.…”

Section: Table 1 Nomenclaturementioning

confidence: 99%

Performance and impact of cryogenic pulsating heat pipe using a different number of turns and helium gas

Munimathan¹,

Mohanavel

Rajalingam

et al. 2022

THERM SCI

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The present work involves the development of helium based Pulsating heat pipe (PHP), which containing 48 parallel tubing parts. Pulsating heat pipe (PHP) is considered as one of the best alternatives for conducting metals and it is used for long distance heat transfer process. Their heat transfer capability and efficient thermal conductivity are the prominent properties which considered for applications. The region of the condenser was thermally sealed to the giffored mcmohanon cryo-cooler [gm-cryo cooler] using a cooling cap of 1.49 W at 4.2 K while 1.1 W of heat are allowed to the evaporator section at a filling rate of 70%, through comparing the 48-turn PHP and 8-turn PHP, a most intense efficient thermal conductivity of 12329 W/ mK was achieved in the 48 turn PHP. The influence of no turns of warm movement execution was observed with the same operating parameters and topographical parameters. Observations revealed that the temperature variations of PHP 48-turn was significantly less than that of PHP 8-turn. It exhibited efficient thermal conductivity, high capacity heat transfer and a good dry-out temperature response. Thus PHP 48-turn of series and parallel configurations are defined as excellent system designs and are accessible to the PHP cryogenics framework architecture.

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Section: Table 1 Nomenclaturementioning

confidence: 99%

Performance and impact of cryogenic pulsating heat pipe using a different number of turns and helium gas

Munimathan¹,

Mohanavel

Rajalingam

et al. 2022

THERM SCI

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“…It is important that when assembling this type of engine, the structural and kinematic elements of the working mechanism and engine block are so arranged that the piston working in the hot cylinder is shifted in phase ahead to the piston moving in the cold cylinder. More details about the alpha-type Stirling engine can be found in [37,[39][40][41][42][43][44][45][46].…”

Section: Stirling Engine Designsmentioning

confidence: 99%

Modern Small and Microcogeneration Systems—A Review

2021

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Small and micro energy sources are becoming increasingly important in the current environmental conditions. Especially, the production of electricity and heat in so-called cogeneration systems allows for significant primary energy savings thanks to their high generation efficiency (up to 90%). This article provides an overview of the currently used and developed technologies applied in small and micro cogeneration systems i.e., Stirling engines, gas and steam microturbines, various types of volumetric expanders (vane, lobe, screw, piston, Wankel, gerotor) and fuel cells. Their basic features, power ranges and examples of implemented installations based on these technologies are presented in this paper.

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“…Kowalska and Pazdzior [16] proposed utilizing the cold exergy of LNG in micro-cogeneration and micro trigeneration in the food industry. Also, the use of Stirling cycles for small scale plants has been discussed by some authors, mainly such as Szczygieł, Buliński et al [17][18][19]. Stirling cycles using LNG evap-oration to cool down the heat sink have the additional advantage over conventional Stirling cycles since the internal heat transfer coefficients are higher at lower temperatures.…”

Section: Cryogenic Power Plant Technologiesmentioning

confidence: 99%

Archives of Thermodynamics

Szczygieł,

Rutczyk

2021

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Liquefied natural gas (LNG) is transported by the sea-ships with relatively low pressure (0.13-0.14 MPa) and very low temperature (about 100 K) in cryo-containers. Liquid phase, and the low temperature of the medium is connected with its high exergy. LNG receives this exergy during the liquefaction and is related with energy consumption in this process. When the LNG is evaporated in atmospheric regasifiers (what takes place in many on-shore terminals as well as in local regasifier stations) the cryogenic exergy is totally lost. fortunately, there are a lot of installations dedicated for exergy recovery during LNG regasification. These are mainly used for the production of electricity, but there are also rare examples of utilization of the LNG cryogenic exergy for other tasks, for example it is utilized in the fruit lyophilization process. In the paper installations based on the Brayton cycle gas turbine are investigated, in the form of systems with inlet air cooling, liquid phase injection, exhaust gas based LNG evaporation and mirror gas turbine systems. The mirror gas turbine system are found most exegetically effective, while the exhaust gas heated systems the most practical in terms of own LNG consumption.

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Finite time thermodynamic analysis of small alpha-type Stirling engine in non-ideal polytropic conditions for recovery of LNG cryogenic exergy

Cited by 13 publications

References 18 publications

Performance and impact of cryogenic pulsating heat pipe using a different number of turns and helium gas

Performance and impact of cryogenic pulsating heat pipe using a different number of turns and helium gas

Modern Small and Microcogeneration Systems—A Review

Archives of Thermodynamics

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