Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Józef Rak"'
Publikováno v:
Energies, Vol 11, Iss 4, p 892 (2018)
Micro-power domestic organic Rankine cycle (ORC) systems are nowadays of great interest. These systems are considered for combined heat and power (CHP) generation in domestic and distributed applications. The main issues of ORC systems design is sele
Externí odkaz:
https://doaj.org/article/933af953f17940709e5b4d299a0fd32a
Publikováno v:
Applied Sciences, Vol 7, Iss 6, p 535 (2017)
Gas pressure reduction stations are commonly applied to decrease the pressure of natural gas in the transmission pipelines. In such stations, natural gas is expanded in throttling valves without producing any energy. Through the use of expander in na
Externí odkaz:
https://doaj.org/article/5c22591fcf2a41fcad6918897fa59722
Autor:
Adam Ruziewicz, Cezary Czajkowski, Andrzej I. Nowak, Józef Rak, Norbert Zieliński, Sławomir Pietrowicz
Publikováno v:
Energy. 254:124369
Publikováno v:
International Journal of Thermal Sciences. 132:645-662
A novel idea of heat transfer enhancement using a U-shaped pulsating tube in a rotating system of coordinates is presented and studied in the paper. The analyzed case consists of a U-shaped tube that rotates around the axis of revolution which is per
Publikováno v:
Energy Procedia. 129:323-330
Small- and micro-power ORC systems designed for domestic use by prosumers should be cheap and reliable. The main part of the ORC system cost is the price of heat exchangers and the expander. Multi-vane expanders are positive displacement volumetric m
Autor:
Józef Rak, Sławomir Pietrowicz
Publikováno v:
Energy. 202:117700
The paper analyzes the influence of specific parameters such as scroll vane shape, discharge pressure and the rotational speed of a scroll compressor, on the thermal balance inside of a working chamber with tangential leakages. A two-dimensional nume
Publikováno v:
Applied Sciences, Vol 7, Iss 6, p 535 (2017)
Applied Sciences; Volume 7; Issue 6; Pages: 535
Applied Sciences; Volume 7; Issue 6; Pages: 535
Gas pressure reduction stations are commonly applied to decrease the pressure of natural gas in the transmission pipelines. In such stations, natural gas is expanded in throttling valves without producing any energy. Through the use of expander in na
Publikováno v:
E3S Web of Conferences, Vol 22, p 00142 (2017)
Multi-vane expanders are positive displacement volumetric machines which are nowadays considered for application in micro-power domestic ORC systems as promising alternative to micro turbines and other volumetric expanders. The multi-vane expander fe
Autor:
Józef Rak, Zbigniew Gnutek
Publikováno v:
Scientific Letters of Rzeszow University of Technology - Mechanics. 31:583-588
Autor:
Józef Rak
Publikováno v:
Józef Rak
The paper presents the full transient, two-dimensional finite volume method numerical calculations of the classical involute scroll compressor geometry. The purpose of the study was to develop and evaluate an adaptable implementation of numerical flu