Results 21 to 30 of about 3,745 (255)

Numerical investigation of oil injection in a Roots blower operated as expander [PDF]

, 2019
The adoption of positive displacement machines as expanders in Organic Rankine Cycles (ORCs) is increasingly common, especially in the low to medium power range. At the same time, these devices often serve as compressor in Vapor-Compression Refrigeration
, Ahmed Kovacevic, Alessio Suman, Casari N, Casari N, Davide Ziviani, Ettore Fadiga, Jasak H, Juretić F, Michele Pinelli, Nicola Casari, Orlandini V, Patankar S, Randi S, Rane S, Sham Rane, Thompson J F   +16 more
core   +2 more sources

Optimisation of two-stage screw expanders for waste heat recovery applications [PDF]

, 2015
It has previously been shown that the use of two-phase screw expanders in power generation cycles can achieve an increase in the utilisation of available energy from a low temperature heat source when compared with more conventional single-phase turbines.
Read, M. G., Smith, I. K., Stosic, N.
core   +1 more source

Mechanistic model of an oil-flooded single-screw expander

, 2016
The power generated from Organic Rankine Cycles (ORCs) is directly related to the performance of the expander used, which in many cases it is adapted from the original compressor. The efficiency of positive displacement expanders depends on several aspects such as internal volume ratio and pressure ratio (under- and over-expansion), leakages, non ...
Ziviani, Davide, Bell, Ian H., De Paepe, Michel, van den Broek, Martijn   +3 more
openaire   +3 more sources

Multi-objective optimization of a novel reversible High-Temperature Heat Pump-Organic Rankine Cycle (HTHP-ORC) for industrial low-grade waste heat recovery [PDF]

, 2019
Nowadays, a high amount of industrial thermal energy is still lost due to the lack of competitive solutions for energy revalorization. Facing this challenge, this paper presents a novel technology, based on a reversible High-Temperature Heat Pump (HTHP ...
Amat-Albuixech, Marta, Mateu-Royo, Carlos, Moles, Fran, Mota-Babiloni, Adrián, Navarro-Esbrí, Joaquín, Peris, Bernardo   +5 more
core   +1 more source

Economic Analysis of Organic Rankine Cycle Using R123 and R245fa as Working Fluids and a Demonstration Project Report

Applied Sciences, 2019
The organic Rankine cycle (ORC) is a popular technology used in waste heat recovery and low-grade heat utilization, which are two important measures to solve the problems brought by the energy crisis.
Xinxin Zhang, Min Cao, Xiaoyu Yang, Hang Guo, Jingfu Wang   +4 more
doaj   +1 more source

Performance evaluation of a novel single-screw compressor and expander design

IOP Conference Series: Materials Science and Engineering, 2019
Abstract Single-screw machines have seen significant development and improvement over the last decades and they are currently employed as both compressors and expanders in several applications. The correct functioning of the machine heavily relies on the meshing between the gate rotors and the central rotor which is directly linked to ...
Davide Ziviani, Patrick J. Goeghegan, Eckhard A. Groll   +2 more
openaire   +1 more source

Resonance Analysis of Single Screw Expander Based on Compressed Air Energy Storage System

Journal of Physics: Conference Series, 2023
Abstract As an important technology to achieve energy restructuring, electricity storage plays an important role in the mission of carbon neutrality in today’s society. Compressed air energy storage is one of the most promising technologies for medium- and small-scale power storage. Single screw expander as an important energy conversion
Xiaofeng Song, Yuting Wu, Ruiping Zhi, Lili Shen, Wei Wang, Biao Lei   +5 more
openaire   +1 more source

Comparison of organic rankine cycle systems under varying conditions using turbine and twin-screw expanders [PDF]

, 2016
A multi-variable optimization program has been developed to investigate the performance of Organic Rankine Cycles (ORCs) for low temperature heat recovery applications using both turbine and twin-screw expanders when account is taken of performance ...
Ahmed Kovacevic, Ian Smith, Matthew Read, Nikola Stosic, Read, Read, Roetzel, Sakun, Smith, Smith, Smith, Smith   +11 more
core   +1 more source

Experimental study of predictive control strategies for optimal operation of organic rankine cycle systems [PDF]

, 2015
In this paper the performance of Model Predictive Control (MPC) and PID based strategies to optimally recover waste heat using Organic Rankine Cycle (ORC) technology is investigated.
Hernandez Naranjo, Jairo Andres, Desideri, Adriano, Ionescu, Clara-Mihaela, Quoilin, Sylvain, Lemort, Vincent, De Keyser, Robain   +5 more
core   +2 more sources

Numerical analysis of oil injection effects in a single screw expander

IOP Conference Series: Materials Science and Engineering, 2018
The pursuit of higher efficiency for compression and micro-power generation systems has pushed the researchers to an in-depth analysis of positive displacement machines. Single-screw machines, among the others, are gaining attention in the Organic Rankine Cycle (ORC) systems as expanders, thanks to their extended maintenance intervals and compactness ...
Randi S., Suman A., Casari N., Pinelli M., Ziviani D.   +4 more
openaire   +2 more sources