Thermodynamics Analysis for Optimal Geometrical Parameters and Influence of Heat Sink Temperature of Gamma-configuration Stirling Engine

Tongdee, Nattakit; Jandakaew, Mongkhol; Dolwichai, Teetut; Thumthae, Chalothorn

doi:10.1016/j.egypro.2017.03.516

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…On the other hand, the ability of Stirling engines to transform low-enthalpy solar energy into mechanical energy makes them ideal for application in low-capacity installations. The Stirling engine has been used in compression refrigeration systems for domestic use due to its low noise level and wide range of use of renewable energy sources such as solar energy, as shown by [8][9][10]. In the same way, parabolic disk collectors are used with Stirling engines and domestic air conditioning systems, due to their capacity and small size, as shown by [11,12].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a Hybrid Compression/Absorption Chiller Driven by Stirling Engine and Solar Dish Collector

et al. 2020

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In this paper, an evaluation of the performance and operating parameters of a hybrid compression/absorption chiller coupled with a low-capacity solar concentrator is presented. The study was carried out using energy and mass balances applied to each component of each system. The variables evaluated in the hybrid chiller were the cooling power, the supply power, the Coefficient of Performance (COP) of both cooling systems and the ratio between heat and power. The diameter and temperature of the hot spot as well as the performance of the dish collector were evaluated. The changed parameters were the heat removed by each refrigeration system, the condenser temperature, the evaporator temperature, the concentration ratio and the irradiance. Results have shown that the compression system can produce up to 53% more cooling power than the heat supplied to the hybrid system. Meanwhile, the absorption system produces approximately 20% less cooling power than the supplied heat. It has also been found that, for the cooling power produced by the hybrid cooler to be always greater than the heat supplied, the cooling power provided by the absorption system should preferably be between 20% and 60% of the total, with a Stirling engine efficiency between 0.2 and 0.3 and a condensation temperature from 28 to 37 °C. Likewise, it has been found that the compression system can produce cooling power up to 3 times higher than the heat of the Stirling engine hot source, with Th = 200 °C and ηs = 0.3. Finally, it has been found that, in a low-capacity solar concentrator, on a typical day in Mexico City, temperatures in the hot spot between 200 and 400 °C can be reached with measured irradiance values from 200 to 1200 W/m2.

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Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a Hybrid Compression/Absorption Chiller Driven by Stirling Engine and Solar Dish Collector

et al. 2020

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A comprehensive scouting of space cooling technologies in Europe: Key characteristics and development trends

Elnagar,

Pezzutto,

Duplessis

et al. 2023

Renewable and Sustainable Energy Reviews

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Development of Stirling Pump mechanism for Irrigation in remote rural farms

Wazed¹,

Hughes²,

O’Connor³

et al. 2019

WPE

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Inadequate supply of safe water, the requirement of food exports, Low GDP creates a scenario where 26% of the population in the Sub-Saharan Africa suffer from food insecurity. Cultivation of food locally is necessary to drive the cost of food down. This can be done using the abundant groundwater source in the region, however, the energy cost of harvesting the water supply is very high and hence not presently utilised. While solar PV technology is readily available, PV solutions are much too expensive for small scale rural farmers. This research aims at developing a solar thermal powered Stirling pump that can be produced locally, using local resources to reduce irrigation costs and provide income, food and energy security in the region, by promoting independent farming through small-scale farms. In order to develop the Stirling pump, a Low Temperature Differential (LTD) Stirling engine has been modelled in 3D, simulated and investigated with the help of Computational Fluid Dynamics with ANSYS 16.1 software. The Analysis is aimed at obtaining a true representation of the pressure, temperature and compression ratio that dictate the functioning of a Gamma type Stirling engine. This model developed can then be modified and improved upon to further boost the performance of the Stirling Engine to be integrated with a water pumping system to extract ground water for irrigation purposes.

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Thermodynamics Analysis for Optimal Geometrical Parameters and Influence of Heat Sink Temperature of Gamma-configuration Stirling Engine

Cited by 3 publications

References 6 publications

Modeling and Simulation of a Hybrid Compression/Absorption Chiller Driven by Stirling Engine and Solar Dish Collector

Modeling and Simulation of a Hybrid Compression/Absorption Chiller Driven by Stirling Engine and Solar Dish Collector

A comprehensive scouting of space cooling technologies in Europe: Key characteristics and development trends

Development of Stirling Pump mechanism for Irrigation in remote rural farms

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