The Experimental Investigation of Scroll Expanders Operating in the ORC System with HFE7100 as a Working Medium

Kaczmarczyk, Tomasz Z.; Ihnatowicz, Eugeniusz

doi:10.4028/www.scientific.net/amm.831.245

Cited by 9 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that different sources of information give different values (at a temperature of 65 • C) for the density and viscosity of the HFE7100 liquid and they differ by approx. 4.5% and 8%, respectively [5].…”

Section: Prototypical Rotor-jet Pumpmentioning

confidence: 97%

“…This pump must be able to provide adequate pressure (1.2 MPa absolute pressure) and flow rate (0.17 kg/s) of the working fluid (HFE7100) at the inlet to an expansion machine. Based on the market analysis and measurements made [5], it was found that pumps that meet the above-mentioned criteria are not available. It should be noted that the HFE7100 fluid is a solvent, which considerably limits the possibility of using commercial pumps because of the potential damage to seals and structural elements of the pump (such as, for instance, shaft, bearings, impeller or body).…”

Section: Prototypical Rotor-jet Pumpmentioning

confidence: 99%

“…There are many varieties of small combined heat and power (CHP) cycles, which can differ from each other in terms of heat sources, working fluids and/or expansion machines used in them. However, commercial pumps are often not capable of achieving appropriate operating parameters so as to use them in small ORCs [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Archives of Thermodynamics

Kaczmarczyk

Ihnatowicz

Żywica

et al. 2019

View full text Add to dashboard Cite

The purpose of the work was to experimentally determine the characteristics of the prototype of a Roto-Jet pump (the Pitot tube pump) during its operation under conditions typical for the domestic micro power plant. The low-boiling fluid, sold under the trade name of HFE7100 and characterised by a zero ozone depletion potential (ODP) coefficient, was used as a working medium in the organic Rankine cycle (ORC). An electric thermal oil heater with a maximum power of 2×24 kWe was used as a heat source. The pump of Roto-Jet type was specially designed for the operation with the following rated parameters of the thermodynamic cycle: nominal flow rate of the working fluid 0.17 kg/s, operating pressure 1.2 MPa. The pump was put under load using an expansion valve that simulated the operation of an expansion machine. The article discusses thermodynamic and flow conditions to be met by the pumping engine as well as results of the experimental research. Moreover, the article includes the operational characteristics of the ORC installation and the Roto-Jet pump obtained during the operation with the target working medium -HFE7100. The engineering problems the authors of this article faced when designing and testing the pumping engine prototype are also presented.

show abstract

Section: Prototypical Rotor-jet Pumpmentioning

confidence: 97%

Section: Prototypical Rotor-jet Pumpmentioning

confidence: 99%

See 1 more Smart Citation

Archives of Thermodynamics

Kaczmarczyk

Ihnatowicz

Żywica

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Rotodynamic pumps can be used in many industries [5,15], due to their ability to work with so many different working mediums, throughout a wide operating range in terms of pressure and flow rate. Furthermore, they are perceived as highly reliable devices [3].…”

Section: Introductionmentioning

confidence: 99%

Identification of the causes of increased vibrations in the high-power multi-stage rotodynamic pump

Żywica¹,

Flaszyński²,

Kaczmarczyk³

et al. 2018

Diagnostyka

View full text Add to dashboard Cite

The article discusses the vibrodiagnostic tests of a multi-stage high-power rotodynamic pump. The tested pump was operated as a feed water pump in an industrial combined heat and power plant. However, some time ago, its dynamic performance started to deteriorate. Therefore, diagnostic tests were carried out, the aim of which was to identify the reasons for the increased vibration level and to minimise it. The scope of the performed work included both the analysis of possible excitation forces originating from the flow system and measurements of the pump vibrations at different power levels. Additionally, at selected measuring points, vibration velocity spectra were registered and eigenfrequencies were determined. The analysis of the obtained results allowed to clearly identify the causes of dynamic problems and introduce changes that enable their elimination.

show abstract

“…In accordance with the requirements included in the Directive 2006/42/EC, the Ordinance of the Minister of Economy [49] and the Ordinance of the Minister of Labour and Social Policy [50], vibroacoustic tests of the two types of expansion devices were carried out, during their operation in the cogeneration ORC installation with the low-boiling working medium HFE7100. The following expansion devices were examined: 3 kW e prototypical four-stage radial microturbine [51] and 1 kW e commercial scroll expander [52,53].…”

Section: Introductionmentioning

confidence: 99%

Vibroacoustic diagnostics of a radial microturbine and a scroll expander operating in the organic Rankine cycle installation

Kaczmarczyk¹,

Żywica²,

Ihnatowicz³

2016

J. vibroeng.

Self Cite

View full text Add to dashboard Cite

The article presents the results of vibroacoustic research on a prototypical 4-stage radial microturbine and a scroll expander operating in the organic Rankine cycle with the low-boiling fluid HFE7100. The high-speed microturbogenerator had the electrical capacity of 3 kW e at the nominal speed of 24000 rpm. The low-speed expander with a capacity of 1 kW e and a nominal speed of 3600 rpm was made by Air Squared. The frequency characteristics and overall vibration level (vibration velocity Vrms) measurements were conducted for both the microturbine and the expander, depending on the rotational speed and on the power consumption of electrical energy receivers. The level of noise emitted by the microturbine and expander was also determined. The research was carried out for various electrical loads of the expansion devices generators running in the ORC system. The devices were tested in the following electric power ranges: from 550 W e to 1150 W e (scroll expander) and from 800 W e to 1800 W e (radial microturbine). Based on the obtained results, dynamic state assessment of the tested machines was performed and their noise and vibration levels were analysed.

show abstract

The Experimental Investigation of Scroll Expanders Operating in the ORC System with HFE7100 as a Working Medium

Cited by 9 publications

References 12 publications

Archives of Thermodynamics

Archives of Thermodynamics

Identification of the causes of increased vibrations in the high-power multi-stage rotodynamic pump

Vibroacoustic diagnostics of a radial microturbine and a scroll expander operating in the organic Rankine cycle installation

Contact Info

Product

Resources

About