This paper proposes a new combined multi-cooling and power generation system (CMCP) driven by solar energy. Carbon dioxide is used as refrigerant. A parabolic trough collector (PTC) employed to collect radiation convert it into thermal The includes supercritical CO2 for production an ejector refrigeration with two ejectors provide cooling at different evaporating temperatures. CMCP simulated ho...

Integrated energy systems (IES) for combined power, heat and refrigeration supply achieved a wide application due to high flexibility in matching current loading. So as electricity is easily convertible into any other form of energy, gas engines are widely applied driving characterized by electrical overall efficiency about 45% 90%, respectively. However, the highest thermal at full generated e...

The article deals with pneumatic and hot wire anemometry measurement on subsonic axi-symmetric air ejector. Performances of the ejector with and without pulsations of primary flow are compared, measuring of characteristic pressures and mass flow rates are performed and ejector efficiency is evaluated. The pulsations of primary flow are produced by a synthetic jet generator, which is placed in t...

The paper deals with the problem of accurate measuring techniques and experimental research methods for performance evaluation direct contact jet-type flow condensers. nominal conditions range temperature, pressure rate in all characteristic points novel test rig installation were calculated using developed model. Next, devices measurement a designed testing two-phase spray ejector condensers s...

 liquefied natural gas (LNG) is the most economical way of transporting natural gas (NG) over long distances. Liquefaction of NG by using vapor compression refrigeration system requires high operating and capital cost. Due to lack of systematic design methods for multistage refrigeration cycles, the conventional approaches of determining optimal cycle configuration are mostly based on trial-an...

Expansion work recovery by two-phase ejector is known to be beneficial to vapor compression cycle performance. However, one of the biggest challenges with ejector vapor compression cycle is that the ejector cycle performance is sensitive to working condition changes which are common in real world applications. Different working conditions require different ejector geometries to achieve maximum ...

Gas turbine power plants have been widely studied, and as a result the negative effects on their output thermal efficiency known when operating in atmospheric conditions exceeding ISO conditions. For this reason, different technologies methodologies implemented, aiming to increase improve efficiency. Unfortunately, lack of operational parameters for system limited its characterization implement...

Twelve elderly female rheumatoid arthritis patients (mean age = 65.5 +/- 8.6 yr) were assessed rising from an instrumented Eser Ejector chair under four conditions: high seat (540 mm), low seat (450 mm), with and without the ejector mechanism operating. Sagittal plane motion, ground reaction forces, and vertical chair arm rest forces were recorded during each trial with the signals synchronised...