Article
Thermodynamics
Hongye Zu, Weijun Cheng, Yanan Wang, Ke Li, Xiaotao Wang, Wei Dai
Summary: This paper numerically studies a condensation-driven dilution refrigerator, a type of cold-cycle dilution refrigerator, and analyzes its system performance and the influence of key operating parameters through simulations. The results reveal the mechanism of the condensation-driven dilution refrigerators and provide useful guidance to the design and operation of experimental setup.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Review
Thermodynamics
Leon P. M. Brendel, Stephen L. Caskey, Michael K. Ewert, Derek Hengeveld, James E. Braun, Eckhard A. Groll
Summary: The lack of measured data and detailed documentation makes it difficult for researchers to identify necessary next steps in studying vapor compression refrigeration in space. This paper provides a review of vapor compression systems flown in microgravity, outlining their history and presenting performance data, as well as highlighting gaps in the literature and suggesting future research directions.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Thermodynamics
Houda Eletri, Elias M. Salilih, Mouna Hamed, Ali Fellah
Summary: This study investigates the annual performance of a novel hybrid solar-driven cooling system for refrigerator vehicles. The system utilizes a DC compressor powered by a PV array, with an AC compressor powered by the car alternator providing additional support when the cooling load exceeds the capacity of the DC compressor. The study includes detailed electrical modeling of the PV panels, analysis of the transient electrical power generation, and evaluation of the impact of solar irradiation and ambient temperature on the performance of the PV modules. Additionally, thermodynamics and heat transfer analysis are conducted on the refrigeration cycle, considering the effect of ambient temperature and refrigerator compartment temperature on its performance.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Article
Thermodynamics
Jing He, Chunwan Ya, Xing Tang, Li Ma, Jianghong Wu, Biwang Lu
Summary: This research describes and numerically simulates a novel reciprocating solid state magnetic refrigeration cycle at room temperature. The regenerative process is spontaneously completed between high-and low-temperature magnetocaloric material (MCM) lattices due to an ingenious double-layer structural design. Comparison between single-and multi-layer regenerators is conducted on the temperature span and temperature distribution characteristics by adopting layering MCMs with different Curie temperature points. The effects of crucial variables, including the model's structural parameter, operating parameter, MCM type, and arrangement, are discussed in detail.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Leon P. M. Brendel, Stephen L. Caskey, James E. Braun, Eckhard A. Groll
Summary: This study investigates the operation of vapor compression cycles under varying orientation with respect to gravity. The findings indicate that a system-level inclination dependence indicator decreases with increasing refrigerant mass flux until a certain threshold, beyond which it shows a constant dependence. Additionally, the study reveals that the intensity of liquid flooding in the suction line due to inclination increases with the refrigerant charge.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Thermodynamics
Han Gong, Xiaoteng Ma, Ziyi Li, Shengnan Meng, Bingcheng Wang, Zheng Cui
Summary: A coupled numerical model is established to investigate the influence of structural parameters on heat and mass transfer of 3He-4He mixture in the mixing chamber at ultralow temperature. The results show that the molar amount of the mixture affects the refrigeration temperature and power, increasing the effective volume of the mixing chamber can enhance the refrigeration power, and expanding the volume of the mixing chamber increases the cooling time required to reach 15 mK. Additionally, reducing the proportion of the concentrated phase coolant is beneficial for refrigeration performance, and cuboid mixing chambers achieve lower refrigeration temperatures than other shapes.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
A. T. D. Nakashima, G. F. Peixer, J. A. Lozano, J. R. Barbosa Jr
Summary: This study presents a dynamic lumped parameter model to predict the cabinet temperature, energy consumption and efficiency parameters of a small capacity magnetic refrigerator. The model's primary inputs are geometric features, power source frequencies and speeds, and magnetic material compositions and properties. Special emphasis is placed on the lumped AMR model, which accurately predicts performance based on experimental validation.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Wenshuai Zheng, Jun Shen, Zhenxing Li, Xinqiang Gao, Ke Li, Hongmei Huang, Peng Hai, Zhaojun Mo, Wei Dai
Summary: A hybrid refrigerator that combines the GM refrigeration effect with the magnetic refrigeration effect has been built, and a new magnetic regenerator filled with Pb, ErNi and EuTi0.875Al0.125O3 has been constructed to improve the cooling performance. The new magnetic regenerator filled with EuTi0.875Al0.125O3 could obtain a lower cooling temperature and a larger cooling power in the hybrid refrigerator, as predicted numerically and confirmed by experimental tests.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Jing He, Jianghong Wu, Hangye Zhang, Yaokang Zhang, Biwang Lu
Summary: This study investigates a three-dimensional solid-state magnetic refrigerator based on micro-unit regeneration cycle and Peltier elements, and verifies the reliability of the model with experimental data. The comparison of heat transfer processes and performance characteristics under different configurations reveals that coupling with Peltier elements increases temperature span and frequency, while the parallel-plate heat transfer structure of the magnetocaloric material lattice enhances system performance.
APPLIED THERMAL ENGINEERING
(2021)
Article
Food Science & Technology
Zhicheng Cai, Jiamei Wang, Chencheng Liu, Gu Chen, Xiaohan Sang, Jianhao Zhang
Summary: The effects of high voltage atmospheric cold plasma (HVACP) treatment on microorganism count and quality of Trachinotus ovatus during refrigerator storage were investigated. The results showed that HVACP treatment effectively limited the growth of main microorganisms in fish samples without significant negative impact on their quality.
Article
Thermodynamics
Zhichao Xu, Yefeng Feng, Juncheng Guo
Summary: The simulation study investigates the reciprocating packed bed magnetic refrigeration cycle with the influence of different magnetocaloric effect evaluated methods. Finite Element Method is used to obtain numerical solutions of the thermodynamic equations. Results show that both methods can lead to the same results when the time interval approaches zero. For a larger time interval, the accurate heat expelled and absorbed can be achieved via the straightforward adiabatic temperature change method and the built-in method respectively. Additionally, the calculated Coefficient of Performance is higher for the straightforward adiabatic temperature change method compared to the built-in method.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Physics, Multidisciplinary
Hong-Ye Zu, Wei-Jun Cheng, Ya-Nan Wang, Xiao-Tao Wang, Li Ke, Dai Wei
Summary: This study investigates a condensation-pump dilution refrigerator, which utilizes a condensation pump to achieve the cold cycle of 3He. It has the advantages of compact structure, convenience operation, and low cost. The operating characteristics of the system are analyzed, and experiments are conducted to validate the performance. The system's performance can be improved by adjusting the spiral mode and position of the heat exchanger and increasing the heat transfer area in the mixing chamber.
ACTA PHYSICA SINICA
(2023)
Article
Chemistry, Multidisciplinary
Javier Carcel-Carrasco, Manuel Pascual-Guillamon, Fidel Salas-Vicente
Summary: Energy consumption in the main industries of the food sector is significantly contributed by refrigeration production, making it essential in all production phases. Implementing measures to optimize electricity consumption and improve the efficiency of centralized industrial refrigeration systems can lead to energy savings and enhanced reliability. Adjusting the capacity of power compressors and combining various measures can result in significant energy savings, as demonstrated in the case study in the meat industry discussed in the article.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
M. A. Ben Taher, M. Ahachad, M. Mahdaoui, Y. Zeraouli, T. Kousksou
Summary: This paper presents a physical model to study the energy efficiency of a residential refrigerator containing multiple phase change materials (PCMs). Experimental results show that selecting the appropriate melting temperature and thickness of PCM can significantly improve the performance of the system.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Multidisciplinary
Kittiwoot Sutthivirode, Tongchana Thongtip
Summary: This paper investigates the performance enhancement of an ejector-based chiller by using different mixing chamber profiles, revealing that the ejector with constant rate of momentum change method produces lower chilled water temperature and increases system COP compared to the conventional method.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Hongye Zu, Wei Dai, Yong Li, Ke Li, Jiangtao Li
Summary: The high-emissivity coating effectively reduces the equilibrium temperature of the heat sink, increases the total heat transfer coefficient, and decreases thermal resistance, showing promising potential for thermal management applications.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Hongye Zu, Weijun Cheng, Yanan Wang, Ke Li, Xiaotao Wang, Wei Dai
Summary: This paper numerically studies a condensation-driven dilution refrigerator, a type of cold-cycle dilution refrigerator, and analyzes its system performance and the influence of key operating parameters through simulations. The results reveal the mechanism of the condensation-driven dilution refrigerators and provide useful guidance to the design and operation of experimental setup.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)