A LNG Driven CCHP System with a Cold Energy Recovery Device

The CCHP system based on energy cascade utilization can get very high energy overall utilization efficiency. When LNG is used as the primary energy of a CCHP system, the higher efficiency can be obtained if the cold energy of LNG is recovered. Three CCHP systems integrated with LNG cold recovery facility are presented which are suitable for different situations. The thermodynamic calculation and analysis of the system consisting of combined cycle generating electricity, the LiBr absorption refrigeration units, the cryogenic Rankine cycle generation system and the cooling medium system were carried out. The results showed that the energy utility efficiency of the electricity generating was 34.78% and the total energy utility efficiency was up to 86.49%. This indicates that this technology have the potential to be employed in the industrial applications.

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Exergy Analysis of Cascade Ethylene-Propane Rankine Cycle with Cold Energy Recovery of LNG

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.2489 ◽

2012 ◽

Vol 170-173 ◽

pp. 2489-2493 ◽

Cited By ~ 2

Author(s):

Hong Mei Zhu ◽

Hong Wei Liu ◽

Heng Sun

Keyword(s):

Low Temperature ◽

Exergy Analysis ◽

Rankine Cycle ◽

High Energy ◽

Primary Energy ◽

Exergy Loss ◽

Operating Pressure ◽

Power Cycle ◽

Cold Energy ◽

Exergy Losses

Cascade Rankine power cycle is suitable for cold recovery in a CCHP system which uses LNG as the primary energy. It has the advantages of low operating pressure and high energy efficiency. Exergy analysis of a typical cascade ethylene-propane Rankine power cycle is conducted. The results show that the exergy losses mainly occur in the low temperature part of the cycle. The exergy loss in the LNG-ethylene heat exchanger could reach about 46% of the total exergy loss. Therefore, the reduction of the exergy losses in the low temperature is important for the improvement of the performance of cascade power cycle.

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Process Simulations of the Cold Recovery Unit in a LNG CCHP System with Different Power Cycles

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.3026 ◽

2011 ◽

Vol 90-93 ◽

pp. 3026-3032

Author(s):

Heng Sun ◽

Hong Mei Zhu ◽

Hong Wei Liu

Keyword(s):

Energy Efficiency ◽

High Efficiency ◽

Rankine Cycle ◽

Primary Energy ◽

Combined Cycle ◽

Power Cycles ◽

Power Cycle ◽

Recovery Unit ◽

Cold Energy ◽

Cooling Media

A CCHP system using LNG as the primary energy should integrate cold recovery unit to increase the total energy efficiency. A scheme of CCHP consisting of gas turbine-steam turbine combined cycle, absorption refrigeration unit, cold recovery unit and cooling media system is a system with high efficiency and operation flexibility. Three different power cycles using the cold energy of LNG is(are 或 were) presented and simulated. The results show that the cascade Rankine power cycle using ethylene and propane in the two cycles respectively has highest energy efficiency. However, the unit is most complex. The efficiency of ethylene Rankine power cycle is little lower than the cascade one, and is much higher than the traditional propane Rankine cycle. The complexity of ethylene cycle is identical to that of the propane cycle. The ethylene Rankine power cycle is the referred method of cold recovery in a CCHP system based on overall considerations.

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Strong interactions at very high energy

Uspekhi Fizicheskih Nauk ◽

10.3367/ufnr.0082.196401a.0003 ◽

1964 ◽

Vol 82 (1) ◽

pp. 3-81 ◽

Cited By ~ 16

Author(s):

Evgenii L. Feinberg ◽

Dmitrii S. Chernavskii

Keyword(s):

High Energy ◽

Strong Interactions ◽

Very High Energy ◽

Very High

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The application of two-dimensional imaging to very high energy gamma ray astronomy: Progress report

10.2172/6142335 ◽

1989 ◽

Author(s):

Not Given Author

Keyword(s):

Gamma Ray ◽

High Energy ◽

Progress Report ◽

Two Dimensional ◽

Gamma Ray Astronomy ◽

High Energy Gamma ◽

Very High Energy ◽

Energy Gamma ◽

Very High

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Does the SN rate explain the very high energy cosmic rays in the central 200 pc of our Galaxy?

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stx361 ◽

2017 ◽

Vol 467 (4) ◽

pp. 4622-4630 ◽

Cited By ~ 7

Author(s):

L. Jouvin ◽

A. Lemière ◽

R. Terrier

Keyword(s):

Cosmic Rays ◽

High Energy ◽

High Energy Cosmic Rays ◽

Very High Energy ◽

Very High

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Focused VHEE (very high energy electron) beams and dose delivery for radiotherapy applications

Scientific Reports ◽

10.1038/s41598-021-93276-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

L. Whitmore ◽

R. I. Mackay ◽

M. van Herk ◽

J. K. Jones ◽

R. M. Jones

Keyword(s):

Electron Beams ◽

Focal Point ◽

External Beam Radiotherapy ◽

High Energy ◽

Energy Electron ◽

High Energy Electron ◽

Dose Delivery ◽

Entrance Dose ◽

Very High Energy ◽

Very High

AbstractThis paper presents the first demonstration of deeply penetrating dose delivery using focused very high energy electron (VHEE) beams using quadrupole magnets in Monte Carlo simulations. We show that the focal point is readily modified by linearly changing the quadrupole magnet strength only. We also present a weighted sum of focused electron beams to form a spread-out electron peak (SOEP) over a target region. This has a significantly reduced entrance dose compared to a proton-based spread-out Bragg peak (SOBP). Very high energy electron (VHEE) beams are an exciting prospect in external beam radiotherapy. VHEEs are less sensitive to inhomogeneities than proton and photon beams, have a deep dose reach and could potentially be used to deliver FLASH radiotherapy. The dose distributions of unfocused VHEE produce high entrance and exit doses compared to other radiotherapy modalities unless focusing is employed, and in this case the entrance dose is considerably improved over existing radiations. We have investigated both symmetric and asymmetric focusing as well as focusing with a range of beam energies.

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