A general geometrical model of scroll compressors based on discretional initial angles of involute

Wang, Baolong; Li, Xianting; Shi, Wenxing

doi:10.1016/j.ijrefrig.2005.01.015

Cited by 68 publications

(45 citation statements)

References 4 publications

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“…Thus, searching for maximal f c enables a rapid computationally inexpensive selection of a subset of viable scroll geometries that are likely to be close to optimal when evaluating mechanistic and thermodynamic features in an intensive model such as described in Refs. [7,8], including, e.g., refinements for the suction wrap profiles [9,14] and tradeoffs between the tangential and radial leakage as a function of varying z and the normalization factor.…”

Section: Viability Constraintsmentioning

confidence: 99%

“…While several investigations of scroll expander models and validation experiments are described in the literature [2][3][4][5][6][7], discussion of the choice of the scroll geometry, the single feature upon which all other properties depend, is generally limited to the case of circle involutes in low volume ratio compressor applications [8,9]. In contrast, the present work explores the effect of varying the basic scroll geometry as a method for developing novel scroll machinery at the higher volume ratios needed for many ORC applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geometric Design of Scroll Expanders Optimized for Small Organic Rankine Cycles

Orosz¹,

Mueller

Dechesne

et al. 2013

Journal of Engineering for Gas Turbines and Power

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The application of organic Rankine cycles (ORCs) for small scale power generation is inhibited by a lack of suitable expansion devices. Thermodynamic and mechanistic considerations suggest that scroll machines are advantageous in kilowatt-scale ORC equipment, however, a method of independently selecting a geometric design optimized for high-volume-ratio ORC scroll expanders is needed. The generalized 8-dimensional planar curve framework (Gravesen and Henriksen, 2001, "The Geometry of the Scroll Compressor," Soc. Ind. Appl. Math., 43, pp. 113-126), previously developed for scroll compressors, is applied to the expansion scroll and its useful domain limits are defined. The set of workable scroll geometries is: (1) established using a generate-and-test algorithm with inclusion based on theoretical viability and engineering criteria, and (2) the corresponding parameter space is related to thermodynamically relevant metrics through an analytic ranking quantity fc ("compactness factor") equal to the volume ratio divided by the normalized scroll diameter. This method for selecting optimal scroll geometry is described and demonstrated using a 3 kWe ORC specification as an example. Workable scroll geometry identification is achieved at a rate greater than 3 s À1 with standard desktop computing, whereas the originally undefined 8-D parameter space yields an arbitrarily low success rate for determining valid scroll mating pairs. For the test case, a maximum isentropic expansion efficiency of 85% is found by examining a subset of candidates selected the for compactness factor (volume expansion ratio per diameter), which is shown to correlate with the modeled isentropic efficiency (R 2 ¼ 0.88). The rapid computationally efficient generation and selection of complex validated scroll geometries ranked by physically meaningful properties is demonstrated. This procedure represents an essential preliminary qualification for intensive modeling and prototyping efforts necessary to generate new high performance scroll expander designs for kilowatt scale ORC systems.

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Section: Viability Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geometric Design of Scroll Expanders Optimized for Small Organic Rankine Cycles

Orosz¹,

Mueller

Dechesne

et al. 2013

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

show abstract

“…There are many advantages over the traditional design of piston-pump compressor. For example, only a small number of moving parts and no valves are required, and the rotary motion can be completely balanced, reducing vibration and noise [7][8][9][10][11][12][13][14][15]. However, at the time, the technology was insufficiently advanced for workable models to be manufactured, and it was not until the 1970s that commercial interest in the idea was revived with the development of CNC machine technology [16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

A study on integrated design conjugation profiles application analysis of scroll profiles for automobile air conditioning

Wang

Du²,

Zhang³

et al. 2011

Sci. China Technol. Sci.

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The research on scroll profiles theory at present mainly is aiming at the single profile and its amelioration or parameter optimization, not aiming at the natural characteristic of the profiles equation of scroll profiles itself. Thus, the intrinsic differential equation bearing on arc-length and tangent direction angle was studied. Using the inherent differential equation and general functional theory, the conversion ideas between the expression of intrinsic differential equation and the expression in Cartesian coordinate was studied, and the condition of involutes characteristic was presented. The detailed analysis of four typical scroll profiles was given. According to the four typical scroll profiles and based on the method of Taylor series, the unified formation of general functional integration scroll profiles was established, which perfected general theory of scroll profiles increasingly. The envelope method to seek conjugation engagement profiles was studied. The unified general functional equation of scroll profiles represented the admissible function scrolls and the conjugation engagement characteristic of which was studied. The engagement condition of conjugation scroll profiles and the expression in Cartesian coordinate of conjugation scroll profiles of general functional integration scroll profiles were educed. Therefore, the restriction of inherent characteristics of single scroll profiles model is broken through. Solid modeling and machine tool path simulation can bridge the gap between design and manufacture which is essential for the design and manufacture of scroll compressors. With this method a perfect solid model can be achieved, which leads to an optimal design in terms of quality, delivery time and cost. The presentation of unified formation of general functional integration scroll profiles represents foundation factor of instinct characteristics of scroll profiles, which widens the design method of scroll compressor for automobile air conditioning. automobile air conditioning, scroll compressor profiles, integrated design, expression transform, application analysis Citation:Wang L C, Du L, Zhang X M, et al. A study on integrated design conjugation profiles application analysis of scroll profiles for automobile air conditioning.

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“…Today scroll compressors are widely applied in small and medium sized air-conditioning units [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Research on the natural meshing mechanism and testing analysis of scroll profiles for refrigeration scroll compressor

Wang

Chen

Zhao

et al. 2010

Sci. China Technol. Sci.

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In the design theory of scroll profiles for refrigeration scroll compressor, a mechanism principle of scroll profiles based on the center of natural temporal involutes and meshing region is presented, by which the performance characteristics of the various involutes are studied. Profiles type selection is very important for scroll compressor. Through analyzing the characteristic geometry, natural meshing mechanism is discovered in the study of scrolls. And a novel method for scroll profiles based on natural meshing mechanism is proposed. The result shows that the meshing region angle of odd regular polygon involutes is half of the characteristic-geometry exterior angle, and that of even regular polygon involutes is equal to the exterior angle to the moment. The corresponding meshing region angle is reduced increasingly with the increase of the edge number of characteristic geometry. The performance characteristics of scroll compressor tend towards the best correspondingly. Aiming at the existing problems of profile design for scrolls, we developed a novel methodology to study scroll profile. Originality research was done for the further study of scroll profile. It is the fundamentality factor representing essence character of scroll profiles function itself. scroll profiles, refrigeration scroll compressor, natural mechanism, temporal meshing center, testing analysis Citation:Wang L C, Chen J, Zhao Y Y, et al. Research on the natural meshing mechanism and testing analysis of scroll profiles for refrigeration scroll compressor.

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A general geometrical model of scroll compressors based on discretional initial angles of involute

Cited by 68 publications

References 4 publications

Geometric Design of Scroll Expanders Optimized for Small Organic Rankine Cycles

Geometric Design of Scroll Expanders Optimized for Small Organic Rankine Cycles

A study on integrated design conjugation profiles application analysis of scroll profiles for automobile air conditioning

Research on the natural meshing mechanism and testing analysis of scroll profiles for refrigeration scroll compressor

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