Improvement of the LNG (liquid natural gas) regasification efficiency by utilizing the cold exergy with a coupled absorption – ORC (organic Rankine cycle)

Cholewiński, Maciej

doi:10.1016/j.energy.2015.05.041

Cited by 40 publications

(12 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1) By linear fitting of the measured data , then the linear relationship between pulse width and capacitance can be obtained. (2) the linear formula is written into the lower computer algorithm, then the output capacitance is the calibrated capacitance. The fitted curve equation is as shown 77.431730 357.356393 y x = − (7) The corrected data are shown in Table 3.…”

Section: Experiments and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The liquid level measurement of ultra low temperature cylinder based on the relative capacity method

Li¹,

Wu²,

Xu³

et al. 2016

Proceedings of the 2015 4th National Conference on Electrical, Electronics and Computer Engineering

View full text Add to dashboard Cite

The probe and measurement circuit for the liquid level measurement of ultra low temperature cylinder was designed. Liquid Nature Gas(LNG) sensor is a coaxial capacitance sensor which was used with the material of 304 stainless steel. Teflon was used as an insulating material to isolate the stainless steel sleeve and to realize the coaxial positioning. The circuit was designed based on 7555 timer and STM32 chip, combining the embedded technology to convert the capacitance of the sensor to the pulse signal output. the height and fuel allowance were calculated based on relative capacity method. The experimental results shows that the measuring circuit can converted the capacitance signal of the sensor to pulse signals reliably and stably, the expected measurement accuracy is less than 0.6 % .

show abstract

Section: Experiments and Discussionmentioning

confidence: 99%

“…Liquefied natural gas (LNG) is becoming one of the prominent clean energy sources with its abundance, high calorific value, and low emission and price [1][2][3] . The gas vehicles which used with LNG have been put into operation.…”

Section: Introductionmentioning

confidence: 99%

The liquid level measurement of ultra low temperature cylinder based on the relative capacity method

Li¹,

Wu²,

Xu³

et al. 2016

Proceedings of the 2015 4th National Conference on Electrical, Electronics and Computer Engineering

View full text Add to dashboard Cite

show abstract

“…The selection of the WF is very important because it is a major factor in the ORC system. In this study, nine WFs were selected based on previous studies [10,13,14,16,26,27]. Table A1.…”

Section: Simulation Modelmentioning

confidence: 99%

“…They optimized the three-stage condensation ORC system with 12 different WFs and found that the arrangement of the compression process is not important, whereas that of the expansion process has a significant effect on the cycle performance. Tomków and Cholewiński proposed an ORC system coupled with an absorption cycle using a mixture of ethane and krypton as the WF [16]. They concluded that the proposed cycle had the best performance compared to a simple ORC system and a Brayton cycle.…”

Section: Introductionmentioning

confidence: 99%

Optimization of an Organic Rankine Cycle System for an LNG-Powered Ship

Koo

Choi

et al. 2019

Energies

View full text Add to dashboard Cite

Recovering energy from waste energy sources is an important issue as environmental pollution and the energy crisis become serious. In the same context, recovering liquefied natural gas (LNG) cold energy from an LNG-powered ship is also important in terms of energy savings. To this end, this study investigated a novel solution for a LNG-powered ship to recover LNG cold energy. Six different organic Rankine cycle (ORC) systems (three for high-pressure dual-fuel engines and three for medium-pressure dual-fuel engines) were proposed and optimized; nine different working fluids were investigated; annualized costs for installing proposed ORC systems were estimated based on the optimization results. In addition, a sensitivity analysis was performed to identify the effect of uncertainties on the performance of the ORC systems. As a result, the ORC system for the medium-pressure engines with direct expansion, multi-condensation levels, and a high evaporation temperature exhibited the best performance in terms of exergy efficiency, net power output and actual annualized cost. These results demonstrate the possibility of replacing a typical LNG supply system with an ORC system.

show abstract

“…LNG can be also used as a heat sink in a power cycle using ambient or waste heat as the heat source. The most popular cold power cycles are: the direct expansion cycle [20], the Rankine cycle [21][22][23], the Brayton cycle [24], the absorption power cycle [25], the Stirling cycle [26][27][28] and combined cycles [29][30][31][32]. In most existing cryogenic plants, the recovery method for LNG exergy is based on direct expansion and ORC cycles [14].…”

Section: Introductionmentioning

confidence: 99%

Exergetic Analysis, Optimization and Comparison of LNG Cold Exergy Recovery Systems for Transportation

Dorosz

Wojcieszak

Malecha

2018

Entropy

View full text Add to dashboard Cite

LNG (Liquefied Natural Gas) shares in the global energy market is steadily increasing. One possible application of LNG is as a fuel for transportation. Stricter air pollution regulations and emission controls have made the natural gas a promising alternative to liquid petroleum fuels, especially in the case of heavy transport. However, in most LNG-fueled vehicles, the physical exergy of LNG is destroyed in the regasification process. This paper investigates possible LNG exergy recovery systems for transportation. The analyses focus on "cold energy" recovery systems as the enthalpy of LNG, which may be used as cooling power in air conditioning or refrigeration. Moreover, four exergy recovery systems that use LNG as a low temperature heat sink to produce electric power are analyzed. This includes single-stage and two-stage direct expansion systems, an ORC (Organic Rankine Cycle) system, and a combined system (ORC + direct expansion). The optimization of the above-mentioned LNG power cycles and exergy analyses are also discussed, with the identification of exergy loss in all components. The analyzed systems achieved exergetic efficiencies in the range of 20% to 36%, which corresponds to a net work in the range of 214 to 380 kJ/kg LNG .

show abstract

Improvement of the LNG (liquid natural gas) regasification efficiency by utilizing the cold exergy with a coupled absorption – ORC (organic Rankine cycle)

Cited by 40 publications

References 32 publications

The liquid level measurement of ultra low temperature cylinder based on the relative capacity method

The liquid level measurement of ultra low temperature cylinder based on the relative capacity method

Optimization of an Organic Rankine Cycle System for an LNG-Powered Ship

Exergetic Analysis, Optimization and Comparison of LNG Cold Exergy Recovery Systems for Transportation

Contact Info

Product

Resources

About