Limaçon machine, of which the relative motion between the rotor and housing follows the limaçon curve, belongs to a class of rotary positive displacement machines. The profiles of rotors and housings of those machines can be constructed of either limaçon or circular curves, hence the names: limaçon-to-limaçon, circolimaçon, and limaçon-to-circular machines. This paper presents the investigation into the thermodynamic performance of the limaçon-to-circular machines with the presence of apex seals and inlet valve. This paper sets out by briefly introducing the limaçon technology and the construction of the limaçon-to-circular machine working volume. The mathematical descriptions of ports' positions and areas have also been introduced. The paper then discusses the flow and phase composition of working fluid through the working chambers as well as how the fluid velocity is modeled and calculated. Then the seal dynamic model and response of inlet valve are presented followed by the machine thermodynamic model. A case study has also been presented to show the responses of seals and inlet valve during the machine operation.

References

References
1.
International Energy Agency,
2015
,
Key World Energy Statistics
,
OECD/International Energy Agency
,
Paris, France
.
2.
IPCC,
2015
, “
Climate Change 2014—Synthesis Report
,” Intergovernmental Panel on Climate Change, Geneva, Switzerland, accessed June 6, 2018, https://www.ipcc.ch/pdf/assessment-report/ar5/syr/SYR_AR5_FINAL_full_wcover.pdf
3.
Mathias
,
J.
,
Johnston
,
J.
,
Cao
,
J.
,
Priedeman
,
D.
, and
Christensen
,
R.
,
2009
, “
Experimental Testing of Gerotor and Scroll Expanders Used in, and Energetic and Exergetic Modeling of, an Organic Rankine Cycle
,”
ASME J. Energy Resour. Technol.
,
131
(
1
), p.
012201
.
4.
Lemort
,
V.
,
Quoilin
,
S.
,
Cuevas
,
C.
, and
Lebrun
,
J.
,
2009
, “
Testing and Modeling a Scroll Expander Integrated Into an Organic Rankine Cycle
,”
Appl. Therm. Eng.
,
29
(
14–15
), pp.
3094
3102
.
5.
Sultan
,
I.
, and
Schaller
,
C.
,
2011
, “
Optimum Positioning of Ports in the Limaçon Gas Expanders
,”
ASME J. Eng. Gas Turbines Power
,
133
((
10
), p.
103002
.
6.
Sultan
,
I.
,
2012
, “
Optimum Design of Limaçon Gas Expanders Based on Thermodynamic Performance
,”
Appl. Therm. Eng.
,
39
, pp.
188
197
.
7.
Phung
,
T. H.
,
Sultan
,
I. A.
, and
Boretti
,
A.
,
2016
, “
Design of Limaçon Gas Expanders
,”
Nonlinear Approaches in Engineering Applications
,
R. N.
Jazar
, and
L.
Dai
, eds.,
Springer International Publishing
, Cham,
Switzerland
, pp.
91
120
.
8.
McNeil
,
D.
,
2000
, “
Two-Phase Flow in Orifice Plates and Valves
,”
Proc. Inst. Mech. Eng., Part C
,
214
(
5
), pp.
743
756
.
9.
Fairhurst
,
C.
,
1983
, “
Component Pressure Loss During Two-Phase Flow
,”
International Conference on the Physical Modelling of Multi-Phase Flow
, Coventry, UK, Apr., pp.
1
24
.
10.
Massoud
,
M.
,
2005
,
Engineering Thermofluids - Thermodynamics, Fluid Mechanics and Heat Transfer
,
Springer
,
Berlin
.
11.
Munson
,
B.
,
Okiishi
,
T.
,
Huebsch
,
W.
, and
Rothmayer
,
A.
,
2013
,
Fundamentals of Fluid Mechanics
,
Wiley
,
Hoboken, NJ
.
12.
Ryley
,
D.
,
1964
, “
Property Definition in Equilibrium Wet Steam
,”
Int. J. Mech. Sci.
,
6
(
6
), pp.
445
454
.
13.
Lemmon
,
E. W.
,
Huber
,
M. L.
, and
McLinden
,
M. O.
,
2010
, “
NIST Reference Fluid Thermodynamic and Transport Properties—REFPROP Version 9.0
,” National Institute of Standards and Technology, Gaithersburg, MD.
14.
Lund
,
H.
, and
Flatten
,
T.
,
2010
, “
Equilibrium Conditions and Sound Velocities in Two-Phase Flows
,”
SIAM Annual Meeting (AN10)
, Pittsburgh, PA, July 12–16.
15.
Yuan
,
Q.
, and
Li
,
P. Y.
,
2004
, “
Self-Calibration of Push-Pull Solenoid Actuators in Electrohydraulic Valves
,”
ASME
Paper No. IMECE2004-62109.
16.
Tuymer
,
W. J.
, and
Machu
,
E. H.
,
2001
, “
Compressor Valves
,”
Compressor Handbook
,
P. C.
Hanlon
, ed.,
McGraw-Hill
,
New York
, pp.
20.1
20.29
.
17.
Sultan
,
I.
,
2005
, “
The Limaçon of Pascal: Mechanical Generation and Utilization for Fluid Processing
,”
Proc. Inst. Mech. Eng., Part C
,
219
(
8
), pp.
813
822
.
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