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1. Lumped parameter model for resonant frequency estimation of a thermoacoustic engine with gas-liquid coupling oscillation | |||
TANG Ke,LEI Tian,LIN Xiaogang,JIN Tao,ZHANG Yu | |||
Dynamic and Electronic Engineering 20 February 2012 | |||
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Abstract:Gas-liquid coupling oscillation is a novel approach for reducing the resonant frequency and for elevating the pressure amplitude of a thermoacoustic engine. If a thermoacoustic engine is used to drive low-frequency pulse tube refrigerators, the frequency matching between the thermoacoustic engine and the refrigerator plays an important role. Based on an acoustic-electric analogy, a lumped parameter model is proposed to estimate the resonant frequency of a standing-wave thermoacoustic engine with gas-liquid coupling oscillation. Moreover, a simplified lumped parameter model is also developed to reduce the computation complexity. The resonant frequency dependence on the mean pressure, the gas space volume, and the water column length is computed and analyzed. The impact of different working gases on the resonant frequency is also discussed. The effectiveness of the models is validated by comparing the computed results with the experimental data of the gas-liquid coupling oscillation system. An increase in mean working pressure can lead to a rise in resonant frequency, and a lower resonant frequency can be achieved by elongating the liquid column. In comparison with nitrogen and argon, carbon dioxide can realize a lower frequency due to a smaller specific heat ratio. | |||
TO cite this article:TANG Ke,LEI Tian,LIN Xiaogang, et al. Lumped parameter model for resonant frequency estimation of a thermoacoustic engine with gas-liquid coupling oscillation[OL].[20 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4467513 |
2. Study on the Position of the Trailer House Vacuum Insulation Panel in Cold Regions | |||
Kan Ankang,Han Houde,Lou Haijun | |||
Dynamic and Electronic Engineering 10 May 2010 | |||
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Abstract:According to thermal comfort and energy conservation of trailer house, it analyzes the heat transfer characteristics about envelop enclosure of trailer house in cold regions. And it is got by the method of non-steady state heat conduction from two aspects, that is, the heat conduction and heat storage of envelop enclosure. It gets the method to calculate heat load of envelop enclosure and the conclusion that the vacuum insulation panel located inside the enclosure of house is more suitable in cold regions | |||
TO cite this article:Kan Ankang,Han Houde,Lou Haijun. Study on the Position of the Trailer House Vacuum Insulation Panel in Cold Regions[OL].[10 May 2010] http://en.paper.edu.cn/en_releasepaper/content/4371237 |
3. Study on The Onset Temperature of A Standing Wave Thermoacoustic Engine Based on Circuit Network Theory | |||
Li Yanfeng ,Qiu Limin ,Lai Bihui,Sun Daming,Wang Bo | |||
Dynamic and Electronic Engineering 29 December 2009 | |||
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Abstract:Onset mechanism is one of the most basic problems in the thermoacoustic field. However there is no reasonable theoretical interpretation of it by now. The active and instability criteria in the circuit network theory were proposed to calculate the onset temperature of the standing wave thermoacoustic engine. A novel model was proposed based on circuit network analogy. The influences of the porosity of the heat exchanger, stack and the length of the resonant tube to the onset temperature were analyzed. The calculated results are in agreement with the experiments. | |||
TO cite this article:Li Yanfeng ,Qiu Limin ,Lai Bihui, et al. Study on The Onset Temperature of A Standing Wave Thermoacoustic Engine Based on Circuit Network Theory[OL].[29 December 2009] http://en.paper.edu.cn/en_releasepaper/content/38248 |
4. INFLUENCE OF ACOUSTIC PRESSURE AMPLIFIER ON PERFORMANCE OF THERMOACOUSTIC ENGINE DRIVING RC LOAD | |||
Tang Ke,Lin Xiaogang,Huang Zhongjie,Chen Guobang | |||
Dynamic and Electronic Engineering 05 January 2009 | |||
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Abstract:A standing wave thermoacoustic engine driving a resistance-and-compliance load (RC load) through an acoustic pressure amplifier (APA) is simulated with linear thermoacoustics. The distribution of pressure amplitude and velocity amplitude in the APA is analyzed. Detailed discussion focuses on the influence of APA’s length and diameter on the pressure ratio at inlet and outlet of APA, as well as the acoustic power delivered to the RC load. And the mechanism of amplification effect of pressure ratio and acoustic power output by APA is also analyzed. | |||
TO cite this article:Tang Ke,Lin Xiaogang,Huang Zhongjie, et al. INFLUENCE OF ACOUSTIC PRESSURE AMPLIFIER ON PERFORMANCE OF THERMOACOUSTIC ENGINE DRIVING RC LOAD[OL].[ 5 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27357 |
5. Fast Calculation Method for Supercritical CO2 Thermodynamic Properties | |||
Dan Zhao,Guoliang Ding,Zhigang Wu | |||
Dynamic and Electronic Engineering 03 April 2008 | |||
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Abstract:Calculations of refrigerant thermal properties are desired to be very fast and stable in cases of simulation of refrigeration system, etc. The implicit curve-fitting method is a quite good method for the fast and stable calculation of refrigerant thermodynamic properties, and it has been used for saturated, two-phase, superheated and subcooled refrigerants. In this paper, new fast calculation method for supercritical CO2 is presented. The results shows that the calculation speeds of the fast calculation formulae for supercritical CO2 are more than 100 times faster than those of REFPROP 7.1 while the total mean relative deviation of the fast calculation formulae from REFPROP 7.1 is less than 1.8 %. | |||
TO cite this article:Dan Zhao,Guoliang Ding,Zhigang Wu. Fast Calculation Method for Supercritical CO2 Thermodynamic Properties[OL].[ 3 April 2008] http://en.paper.edu.cn/en_releasepaper/content/20104 |
6. Extension of The Implicit Curve-Fitting Method for Fast Calculation of Thermodynamic Properties to Subcooled Refrigerant | |||
Guoliang Ding,Zhigang Wu,Weizhe Han,Kaijian Wang,Masaharu Fukaya | |||
Dynamic and Electronic Engineering 04 March 2008 | |||
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Abstract:Calculations of refrigerant thermal properties are desired to be very fast and stable in cases of simulation of refrigeration system, etc. The implicit regress and explicit calculation method is a quite good method for the fast and stable calculation of refrigerant thermodynamic properties, and it has been used for saturated, two-phase and superheated refrigerants. In this paper, the implicit regress and explicit calculation method is extended to the calculation of subcooled refrigerants. As an example, the fast calculation formulae for subcooled refrigerant R22, R134a, R410A and R407C are developed based on the source data derived from NIST REFPROP 7.1. The comparison shows that, for pure refrigerant, the total mean relative deviations of the fast calculation formulae are less than 0.02 % and the maximum relative deviations are less than 0.60%; for refrigerant mixtures, the total mean relative deviations of the fast calculation formulae are less than 0.08%. The maximum relative deviation of R410A is less than 3.36% while the maximum relative deviation of R407C is less than 0.87%. The mean calculation speed of the fast calculation formulae for thermal properties of pure refrigerant and that of refrigerant mixtures are near 100 times and more than 1500 times faster than those of NIST REFPROP 7.1, respectively. | |||
TO cite this article:Guoliang Ding,Zhigang Wu,Weizhe Han, et al. Extension of The Implicit Curve-Fitting Method for Fast Calculation of Thermodynamic Properties to Subcooled Refrigerant[OL].[ 4 March 2008] http://en.paper.edu.cn/en_releasepaper/content/18990 |
7. Developments in Reverse Brayton Cycle Cryocooler | |||
Hou Y ,Zhao H L,Chen C Z,Xiong L Y | |||
Dynamic and Electronic Engineering 20 December 2005 | |||
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Abstract:As one of the primary methods of cryogenic refrigeration, reverse Brayton cycle cryocooler, which includes high-speed turbine using gas bearing and compact heat exchanger, has many advantages such as long-life, high reliability and efficiency. In this paper general aspects of reverse Brayton cycle cryocooler in China are introduced, such as its application in the space simulation program, mechanical cryocooler for lower temperature space applications. The main design parameters and operating performance of cryocoolers are presented in this paper. | |||
TO cite this article:Hou Y ,Zhao H L,Chen C Z, et al. Developments in Reverse Brayton Cycle Cryocooler[OL].[20 December 2005] http://en.paper.edu.cn/en_releasepaper/content/4499 |
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