Studies on a two-stage transcritical carbon dioxide heat pump cycle with flash intercooling

Agrawal, Neeraj; Bhattacharyya, Souvik

doi:10.1016/j.applthermaleng.2006.08.008

Cited by 46 publications

(17 citation statements)

References 8 publications

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“…Their simulation results also indicated that internal heat exchanger effectiveness has marginal influence on the system performance although the compressor isentropic efficiency showed an about 10 per cent variation in COP. As well as their previous study [16], optimum gas cooler and intermediate pressures have only marginally affected the system COP. Yari [18] presented a new configuration of ejector-expansion two-stage CO 2 refrigeration system with an internal heat exchanger and intercooler to enhance system performance.…”

Section: Introductionmentioning

confidence: 89%

Experimental study on a two-stage rolling piston CO₂ compressor based on p–V indicator diagrams

Yang

Chen

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this article, a new two-stage rolling piston CO 2 compressor was developed. A test rig was designed to measure the performance of this compressor. Based on the measured p-V indicator diagram, the distributions of indicated power and compressor performance under various operating conditions have been analysed in detail. It is shown that the discharge passage loss of the first stage and the suction passage loss of the second stage are much higher than other losses for the tested compressor. The overall efficiency of the tested compressor decreases by 1.2 per cent with the decrease of the discharge pressure at the same suction conditions. It is also found that the superheating at the compressor inlet has very small (0.3 per cent) effect on the compressor performance.

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Section: Introductionmentioning

confidence: 89%

Experimental study on a two-stage rolling piston CO₂ compressor based on p–V indicator diagrams

Yang

Chen

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Examples of such studies include the works of Rasi [1], Czaplinksy [2], Arora and Dhar [3], Domanski [4], Zubair et al [5] and Ouadha et al [6]. Research on twostage compression cycles, especially with compound compressors, currently focuses on their application in air-conditioning systems with CO 2 (Celik [7], Cavallini et al [8]), in commercial refrigeration with hydrofluorocarbons (Torrella et al [9,10], Llopis et al [11,12]), and in high-efficiency heat pumps with HFCs (Zehnder [13]) and CO 2 (Agrawal and Bhattacharyya [14,15]), where the improvement in energy efficiency in relation to single-stage systems can be as much as 20%.…”

Section: Introductionmentioning

confidence: 99%

A general methodology for energy comparison of intermediate configurations in two-stage vapour compression refrigeration systems

Torrella

Larumbe

Cabello

et al. 2011

Energy

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“…CO 2 exhibits excellent heat transfer properties and is non-flammable and non-toxic in nature [8]. It has relatively lower specific volume i.e.…”

Section: Introductionmentioning

confidence: 99%

Energetic and Exergetic Performance Analyses of Solar Dish Based CO2 Combined Cycle

Ghosh¹,

Mukhopadhyay²

2014

Int. J. Thermo

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This paper presents a conceptual configuration of a solar dish based combined cycle power plant with a topping gas turbine block and a bottoming steam turbine cycle coupled through a heat recovery steam generator (HRSG). Carbon dioxide has been considered as the working fluid for the topping cycle and it has been considered in gaseous state all through the cycle. Two-stage compression has been proposed for the carbon dioxide cycle. The conventional GT combustion chamber is replaced by a high-temperature directly irradiated annular pressurized receiver (DIAPR) consisting of cavity and tubular sections. Detail thermodynamic study has been performed for varying second stage pressure ratioand for varying gas turbine inlet temperature for the combined cycle keeping first stage pressure ratio fixed at 3.The gas turbine inlet temperature has been varied from 625 O C to 900 O C. The study reveals that work output of the combined cycle is maximum when the pressure ratio of the second stage compression is 2. Parametric exergetic analysis has also been performed for the components like dish, solar receiver and stack. The exergy analysis shows that the solar receiver contributes to maximum exergy destruction.

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Studies on a two-stage transcritical carbon dioxide heat pump cycle with flash intercooling

Cited by 46 publications

References 8 publications

Experimental study on a two-stage rolling piston CO₂ compressor based on p–V indicator diagrams

Experimental study on a two-stage rolling piston CO₂ compressor based on p–V indicator diagrams

A general methodology for energy comparison of intermediate configurations in two-stage vapour compression refrigeration systems

Energetic and Exergetic Performance Analyses of Solar Dish Based CO2 Combined Cycle

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Studies on a two-stage transcritical carbon dioxide heat pump cycle with flash intercooling

Cited by 46 publications

References 8 publications

Experimental study on a two-stage rolling piston CO2 compressor based on p–V indicator diagrams

Experimental study on a two-stage rolling piston CO2 compressor based on p–V indicator diagrams

A general methodology for energy comparison of intermediate configurations in two-stage vapour compression refrigeration systems

Energetic and Exergetic Performance Analyses of Solar Dish Based CO2 Combined Cycle

Contact Info

Product

Resources

About

Experimental study on a two-stage rolling piston CO₂ compressor based on p–V indicator diagrams

Experimental study on a two-stage rolling piston CO₂ compressor based on p–V indicator diagrams