..., the Reynolds number was maintained between 100 and 900 for different runs. The simulation and analysis results show that microchannels can be used in building envelop to provide dynamic thermal resistance and increase the energy efficiency in different buildings. The results also show that flow of a water...

... under three different scenarios: Business as Usual (BAU), Continuous Improvement Scenario (CIS), and Accelerated Improvement Scenario (AIS) up to 2030. The BAU scenario presents the energy consumption and CO 2 emissions assuming the current Energy Efficiency Ratio (EER) of 11.8 BTU/Wh is maintained...

... to measure solar radiance and ambient temperature respectively at the intervals of ten minutes. Experiments were carried out using the solar water heating system and a net temperature rise of 22.4°C was obtained. The energy efficiency of the compound collector was 93.1% while the obtained exergy efficiency...

.... Pressure and velocity are monitored at different locations along the resonator. Experiments conducted showed that the stack position and length have an influence on the efficiency of the TAE. For both lengths tested, the efficiency increased as the center position of the stack moved further away from...

... (30.5 °C) to 2.2 bar (36.2 °C) the system output is dropped by 56.4 %. ejector low grade heat CCP vapour compression VCC refrigeration efficiency energy * Contact author: fahid.riaz@u.nus.edu Energy analysis of a new combined cooling and power system for low-temperature heat utilization...

... rate, volumetric yield, and areal yield were 0.21 day −1 , 0.059 gm L −1 day −1 , and 15 gm m −2 day −1 , respectively. Over 10 days of sequential-batch operation, the prototype photobioreactor converted direct-normal solar energy to energy stored in biomass at an average efficiency of 1%. The areal...

.... The effects of changing ORC pump inlet temperature and turbine inlet pressure on different key parameters have been examined to evaluate the performance of the trigeneration system. These parameters are energy and exergy efficiencies, electrical to cooling ratio and electrical to heating ratio. Moreover...

... H2 to CO ratio of 1:1 by volume. Diesel fuel as a pilot was injected into the engine in the conventional manner. The diesel engine was run at varying loads of 20, 40, 60, 80 and 100%. The performance of dual fuel engine is assessed by parameters such as thermal efficiency, exhaust gas temperature...

..., efficiency and process heat is presented and analyzed. Influences of variations in operating pressure and gas composition, on the plant performance are also reported. Solid Oxide Fuel Cell Biomass Efficiency Cogeneration Proceedings of ES2009 ASME 3rd International Conference on Energy...

... in the efficiency calculations. The cooling power represents about 7–10% from the engine power, being thus a valuable side benefit of ammonia’s presence on-board. If the cooling effect is taken into consideration, the system’s effectiveness can be improved by about 20%. It is shown that if a medium size hydrogen...

... 23 06 2009 Efficient energy use is critical for the success of any industrial facility since reduced energy consumption through energy conservation/saving programs can benefit not only consumers and utilities, but society in general as well. In particular, reduced energy consumption...

... 23 06 2009 In this paper, we undertake a study to investigate the performance of a hybrid photovoltaic-hydrogen system through energy and exergy efficiencies, improvement potential. This will help identify the irreversibilities (exergy destructions) for performance improvement purposes...

... 26 02 2009 This paper deals with an exergetic performance analysis of a gas turbine cycle integrated with SOFCs with internal reforming. As the efficiency of a gas turbine cycle is mainly defined by the maximum temperature at the turbine inlet, this temperature is fixed at 1573 K...

...007 007 rnia 257 LE Proceedings of ES2007 Energy Sustainability 2007 June 27-30, 2007, Long Beach, California 257 Copyright © 2007 by ASME and losses in different components of the combined cycle cogeneration unit. Key Words: Combined cycle cogeneration, performance, efficiency, exergy NOMENCLATURE...

... at state i, kPa Qhrsg Heat input rate to the HRSG, kW R Universal gas constant, kJ/kmol K Si Entropy at state i, kJ/kg K ST Steam turbine Ti Temperature at state i, K Wc Work input rate to compressor, MW 1985 commercial applications of steam injection to augment power and efficiency in gas turbines were...

... and quantified and the exergy efficiencies of various components determined. The exergy efficiency of the engine is found to be 40.5% at the specified reference state. The greatest exergy destruction occurs in the engine itself, which account for 84% of total exergy destruction in the system. A parametric...