Utilizing the heat of gas module by an absorption lithium-bromide chiller with an ejector booster stage

Radchenko, Roman; Radchenko, N.; Tsoy, A. P.; Forduy, Serhiy; Anatoliy, Z.; Kalinichenko, I. E.

doi:10.1063/5.0026788

Cited by 18 publications

(10 citation statements)

References 21 publications

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“…LiBr-H 2 O-based chillers have another advantage of direct utilization of waste heat which could potentially save considerable power consumption if used to cool gas or air before compression. 14 Better performance of CO 2 power cycles from waste heat recovery has been reported in a recent paper. 11 The study conducted by Popli et al 13 laid a significant foundation for process optimization via heat recovery of the gas turbine.…”

Section: Introductionmentioning

confidence: 86%

Multistage carbon dioxide compressor efficiency enhancement using waste heat powered absorption chillers

Haq

Uddin

Taqvi

et al. 2021

Energy Science & Engineering

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Section: Introductionmentioning

confidence: 86%

Multistage carbon dioxide compressor efficiency enhancement using waste heat powered absorption chillers

Haq

Uddin

Taqvi

et al. 2021

Energy Science & Engineering

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“…The heat potential converted in refrigeration can be increased by deep heat utilization [23][24][25] and application of lowtemperature condensing surface [26,27]. The absorption lithium-bromide chillers (ACh) are the most widely used and provide cooling air to about 15 ºС with a high coefficient of performance (COP = 0.7-0.8) [28]. The most simple ejector chillers (ECh) enables to provide cooling air to 10 ºС but with a low COP of 0.2 to 0.3 and can be applied as a booster stage [29,30].…”

Section: Literature Reviewmentioning

confidence: 99%

Alternative variable refrigerant flow (VRF) air conditioning systems with rational distribution of thermal load

et al. 2021

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One of the most attractive reserves of enhancing the energetic efficiency of air conditioning systems (ACS) is to provide operation of compressors in closed to nominal modes by choosing the rational design refrigeration capacities and their distribution according to current thermal loading to provide closed to maximum annual refrigeration energy generation. Generally, the overall thermal load band of any ACS comprises the unstable load range, corresponding to ambient air precooling with significant load fluctuations, and a comparatively stable load part for further air conditioning from a threshold temperature to a target value. The stable thermal load range can be covered by operation of conventional compressor in closed to nominal mode, meantime ambient air precooling needs load modulation by applying a variable speed compressor. A proposed ACS enables a wide range of refrigerant flow variation without heat flux drop in air coolers and can be considered as advanced alternative to variable refrigerant flow systems.

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“…Meantime, the highest heat efficiency is possible in the case of heat production and consumption coincidence. The last is generally impossible in traditional TGP [33,34] with applying the most widespread and efficient absorption chiller (ACh) of lithium-bromide type [35,36] to convert the heat released from gas engine in the form of hot water into refrigeration. The excessive heat of return hot water, not consumed by ACh, is removed to the atmosphere through discharge radiator.…”

Section: Introductionmentioning

confidence: 99%

Innovative approaches and modified criteria to improve a thermodynamic efficiency of trigeneration plants

Radchenko,

Forduy

et al. 2024

Journal of Energy Systems

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Trigeneration plants (TGP) desired for combined production of electricity, heat and refrigeration are highly flexible to follow current loading. But their highest efficiency might be possible only when heat production coincides with its consumption, which is generally impossible in traditional TGP with applying the absorption lithium-bromide chiller (ACh) converting the heat, released from combustion engine in the form of hot water, into refrigeration. Usually, the excessive heat of hot water, not consumed by ACh, is removed to the atmosphere through emergency radiator. However, the well-known methods of TGP efficiency assessment do not consider those heat losses and give the overestimated magnitudes of efficiency for conventional TGP with ACh. The application of booster ejector chiller (ECh), as an example, for utilization of the residual waste heat, remained from ACh and evaluated about 25%, has been proposed to produce supplementary refrigeration for cooling cyclic air of driving combustion engine to increase its electrical efficiency by 3-4 %. In the case of using the supplementary refrigeration for technological or other needs the heat efficiency of TGP will increase to about 0.43 against 0.37 for typical TGP with ACh as example. The new modified criteria to assess a real efficiency of conventional TGP, based on ACh, are proposed which enable to reveal the way of its improvement through minimizing the heat waste. Such combined two-stage waste heat recovery system of TGP can be considered as the alternative to the use of back-up gas boiler to pick up the waste heat potential for conversion by ACh to meet increased refrigeration needs.

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Utilizing the heat of gas module by an absorption lithium-bromide chiller with an ejector booster stage

Cited by 18 publications

References 21 publications

Multistage carbon dioxide compressor efficiency enhancement using waste heat powered absorption chillers

Multistage carbon dioxide compressor efficiency enhancement using waste heat powered absorption chillers

Alternative variable refrigerant flow (VRF) air conditioning systems with rational distribution of thermal load

Innovative approaches and modified criteria to improve a thermodynamic efficiency of trigeneration plants

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