Single and multigeneration Rankine cycles with aspects of thermodynamical modeling, energy and exergy analyses and optimization: A key review along with novel system description figures

Tiktas, Aslı; Günerhan, Hüseyin; Hepbaşlı, Arif

doi:10.1016/j.ecmx.2022.100199

Cited by 4 publications

(1 citation statement)

References 173 publications

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“…In this article, we propose to study a miniaturized dynamic ocean temperature difference energy generation device, which mainly applies to ocean exploration equipment represented by Argo. The power generation principle of the device is based on the Kalina cycle [10][11][12][13]. In the early 1980s, Kalina proposed a new family of thermodynamic power cycles using an ammonia-water mixture as the working fluid, and this kind of cycle configuration was named the Kalina cycle, which miniaturizes the volume of the device, innovates the design of the internal structure of the device, and creatively adds phase change compensation materials for auxiliary power generation, which can improve the power generation efficiency while realizing the self-floating and self-sinking of the device.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Efficiency of Dynamic Marine Thermal Energy Generator Based on Phase Change Compensation

Dong

Liu

et al. 2023

JMSE

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Miniaturized detection devices in the ocean generally experience problems such as short endurance and unreliable power supplies. This article aimed to develop a dynamic ocean temperature difference energy collection device to capture ocean temperature difference energy and provide objective electricity for stable detection devices. The main focus was to conduct experimental research on the effectiveness of a dynamic ocean temperature difference energy power generation device. During the research process, the fact that ammonia gas in a working fluid is easy to liquefy and vaporize was utilized. By utilizing the increase in seawater temperature during the floating process of the device, it vaporized and drove the turbine to rotate for power generation. In the structural design, multiple sets of small air chambers were creatively proposed, which could effectively control the air pressure and improve the stability of the airflow. By charging the airflow to impact the turbine, multiple sets of power generation fans were used to form a stable current. Further, the buoyancy of the device could be changed by adding phase change materials between the air chamber and the device shell, and the temperature difference between the two ends of the phase change materials could be used to change the electron density of the material to form a weak current. In this experimental study, concepts such as the structural design of multiple small gas chambers, miniaturization of energy collection devices, compensation power generation of phase change materials, and application scenarios of devices combined with Argo buoys were all proposed for the first time. The results of this experimental study indicate that the overall power generation of the device is about 2A, and its maximum output power amplitude is about 22 W. The cyclic thermal efficiency of the power generation device can be increased from +0.19% to +0.88%. The development of this thermoelectric power generation device can provide a considerable stable power supply for ocean observation devices, especially the buoy device represented by Argo, which can extend the endurance of deep-sea exploration devices.

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Section: Introductionmentioning

confidence: 99%