Energy recovery using sliding vane rotary expanders

Cipollone, Roberto; Contaldi, Giulio; Bianchi, Giuseppe; Murgia, Stefano

doi:10.1533/9781782421702.3.183

Cited by 14 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, the sliding vane expander has been used in the energy recovery system, mechanical power recovered was up to 1.9 kW and 4.4% of the engine shaft power [28,29]. The experimental activity on the sliding vane rotary expander as the device to convert the enthalpy of the working fluid, the overall cycle efficiency and mechanical output power achieved was close to 8% and 2 kW, respectively [30].…”

Section: Introductionmentioning

confidence: 99%

Performance Study on a Single-Screw Expander for a Small-Scale Pressure Recovery System

Zhang

et al. 2016

Energies

View full text Add to dashboard Cite

Abstract:A single-screw expander with 195 mm diameter is developed to recover pressure energy in letdown stations. An experiment system is established using compressed air as a working fluid instead of natural gas. Experiments are conducted via measurements for important parameters, such as inlet and outlet temperature and pressure, volume flow rate and power output. The influence of inlet pressure and rotational speed on the performance are also analyzed. Results indicate that the single-screw expander achieved good output characteristics, in which 2800 rpm is considered the best working speed. The maximum volumetric efficiency, isentropic efficiency, overall efficiency, and the lowest air-consumption are 51.1 kW, 83.5%, 66.4%, 62.2%, and 44.1 kg/(kW·h), respectively. If a single-screw expander is adopted in a pressure energy recovery system applied in a certain domestic natural gas letdown station, the isentropic efficiency of the single-screw expander and overall efficiency of the system are found to be 66.4% and 62.2%, respectively. Then the system performances are predicted, in which the lowest methane consumption is 27.3 kg/(kW·h). The installed capacity is estimated as 204.7 kW, and the annual power generation is 43.3 MWh. In the next stage, a pressure energy recovery demonstration project that recycles natural gas will be established within China, with the single-screw expander serving as the power machine.

show abstract

Section: Introductionmentioning

confidence: 99%

Performance Study on a Single-Screw Expander for a Small-Scale Pressure Recovery System

Zhang

et al. 2016

Energies

View full text Add to dashboard Cite

show abstract

“…The application of multi-vane expanders in ORCs was also investigated at the University of L'Aquila (Italy) in cooperation with Brunel University London (England) and City University London (England). In [71] the authors presented the results of the experimental analyses regarding the application of a multi-vane expander in an experimental ORC plant. A general view of this test system is presented in Figure 10a (adapted from [71]).…”

Section: University Of L'aquila (Italy) Brunel University London (Enmentioning

confidence: 99%

“…In [71] the authors presented the results of the experimental analyses regarding the application of a multi-vane expander in an experimental ORC plant. A general view of this test system is presented in Figure 10a (adapted from [71]). The applied multi-vane expander featured the following geometrical dimensions: the diameter of the cylinder D = 76 mm, the length of the cylinder L = 60 mm, the diameter of the rotor d = 65 mm, the eccentricity e = 5.5 mm, a 4.4 • angle of the opening edge of the inlet window, a 49.4 • , angle of the closing edge of the inlet window, a 200.1 • angle of the opening edge of outlet window, a 317.4 • angle of the closing edge of the outlet window, and the number of vanes z = 7.…”

Section: University Of L'aquila (Italy) Brunel University London (Enmentioning

confidence: 99%

“…The authors stated that thanks to this solution, the pressure drop in the working chamber due to the expansion is compensated by an additional mass of high-enthalpy working medium [78]. Simulations were carried out using the model of a multi-vane expander featuring the same geometrical dimensions as the expander presented in [71][72][73][74][75]. Vanes featuring a width of 3.96 mm and a length of 17 mm were incorporated into this model.…”

Section: University Of L'aquila (Italy) Brunel University London (Enmentioning

confidence: 99%

See 1 more Smart Citation

Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

Kolasiński

2019

Energies

View full text Add to dashboard Cite

This paper reviews the applications of the multi-vane expanders in ORC (organic Rankine cycle) systems. The operating principle and design of the ORC systems are addressed in the introduction. Then, there is a brief review of the expanders applied in small-power and micro-power ORCs, and a discussion of the multi-vane expander design and operating principle as an introduction to a comprehensive review on the applications of the multi-vane expanders in ORC systems. The different features of the multi-vane expanders—i.e., the design of the expander, its geometrical dimensions and operating conditions, durability, applied working fluid, obtained power output, and efficiency—are analyzed in this paper. This review clearly indicates that multi-vane expanders are a promising alternative to the different types of the expanders applied in ORC systems.

show abstract

“…In this reduction process, energy will be wasted. This drawback can be improved if the pressure regulator is replaced by the steam expander [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

An Isothermal Steam Expander for an Industrial Steam Supplying System

Lin

Lai

Kobayashi³

et al. 2015

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Steam is an essential medium used in the industrial process. To ensure steam quality, small and middle scale boilers are often adopted. However, because a higher steam pressure (compared to the necessary steam pressure) is generated, the boiler’s steam pressure will be reduced via a pressure regulator before the steam is directed through the process. Unfortunately, pressure is somewhat wasted during the reducing process. Therefore, in order to promote energy efficiency, a pressure regulator is replaced by a steam expander. With this steam expander, the pressure will be transformed into mechanical energy and extracted during the expansion process. A new type of isothermal steam expander for an industrial steam supplying system will be presented in the paper. The isothermal steam expander will improve the energy efficiency of a traditional steam expander by replacing the isentropic process with an isothermal expansion process. With this, steam condensation will decrease, energy will increase, and steam quality will be improved. Moreover, the mathematical model of the isothermal steam expander will be established by using the Schmidt theory, the same principle used to analyze Stirling engines. Consequently, by verifying the correctness of the theoretical model for the isothermal steam expander using experimental data, a prototype of 100 c.c. isothermal steam expander is constructed.

show abstract

Energy recovery using sliding vane rotary expanders

Cited by 14 publications

References 14 publications

Performance Study on a Single-Screw Expander for a Small-Scale Pressure Recovery System

Performance Study on a Single-Screw Expander for a Small-Scale Pressure Recovery System

Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

An Isothermal Steam Expander for an Industrial Steam Supplying System

Contact Info

Product

Resources

About