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Dynamic characteristics of a direct-heated supercritical carbon-dioxide Brayton cycle in a solar thermal power plant

Singh, Rajinesh; Miller, Sarah A.; Rowlands, Andrew S.; … - In: Energy 50 (2013) C, pp. 194-204

are presented. A control-oriented model describing sCO2 PCS dynamic behaviour has been constructed using mathematical … mass-flow rate control in summer, and the need for control of compressor inlet conditions in winter, for sustained fully …

Persistent link: https://www.econbiz.de/10010807960

Controlling micro-CHP systems to modulate electrical load profiles

Peacock, A.D.; Newborough, M. - In: Energy 32 (2007) 7, pp. 1093-1103

implementation of various penetrations of μCHP system on the resultant electrical load profile using two control methodologies: heat … modulating capability of this control approach may be realised if prime movers capable of rapid start-up, shut-down and cycling … can be developed. The control of micro-CHP systems in this manner offers a mechanism for managing the load at distribution …

Persistent link: https://www.econbiz.de/10011055499

Modeling and control of a SOFC-GT-based autonomous power system

Kandepu, Rambabu; Imsland, Lars; Foss, Bjarne A.; … - In: Energy 32 (2007) 4, pp. 406-417

control structure for the total system is developed. The controller provides satisfactory performance for load changes at the … control relevant models for a SOFC combined with a gas turbine (GT) in an autonomous power system. The model is evaluated … important dynamics of the SOFC and hence it is concluded that the simple model can be used for control and operability studies …

Persistent link: https://www.econbiz.de/10011055546

Using compressor discharge air bypass to enhance power generation of a steam-injected gas turbine for combined heat and power

Kang, Do Won; Jang, Hyuck Jun; Kim, Tong Seop - In: Energy 76 (2014) C, pp. 390-399

In gas turbine combined heat and power systems, steam injection is a good way to cope with seasonal variations in electricity and heat demands. However, even though thermal energy demand decreases considerably in cooling seasons, the surplus exhaust heat cannot be fully utilized for steam...

Persistent link: https://www.econbiz.de/10010939821

Numerical investigation of impeller trimming effect on performance of an axial flow fan

Li, Chunxi; Li, Xinying; Li, Pengmin; Ye, Xuemin - In: Energy 75 (2014) C, pp. 534-548

To study the performance variations of an axial fan after impeller trimming, numerical simulations are executed under …. The effects of trimming quantity and tip clearance on flow field and performance of the axial fan are investigated, and … before and after impeller trimming. The simulated results show that the performance curves after impeller trimming tend to …

Persistent link: https://www.econbiz.de/10010931382

Combustion, performance and emission characteristics of direct injection diesel engine fueled by Jatropha hydrogen peroxide emulsion

Nguyen, Kim-Bao; Dan, Tomohisa; Asano, Ichiro - In: Energy 74 (2014) C, pp. 301-308

Recently, Jatropha, a fast growing tropical plant, has caught the attention of researchers because the oil produced from Jatropha is a non-edible. However, worse emissions, when using raw Jatropha oil in diesel engines, have been reported in the literature due to its higher viscosity and lower...

Persistent link: https://www.econbiz.de/10010931391

Numerical investigation of blade tip grooving effect on performance and dynamics of an axial flow fan

Ye, Xuemin; Li, Pengmin; Li, Chunxi; Ding, Xueliang - In: Energy 82 (2015) C, pp. 556-569

Appropriate changes to the blade tip structure can effectively improve fan performance. The performance of the OB-84 … original tip. Grooved blade tips amplify the fan noise, so measures should be taken to control the noise. Analysis of dynamic …

Persistent link: https://www.econbiz.de/10011209474

Thermoelectric mini cooler coupled with micro thermosiphon for CPU cooling system

Liu, Di; Zhao, Fu-Yun; Yang, Hong-Xing; Tang, Guang-Fa - In: Energy 83 (2015) C, pp. 29-36

between the maximal COP (Coefficient of Performance) and Qc with the figure of merit. Full-scale experiments have been … number on the performance of the cooling system. Experimental results indicated that the cooling production increases with … performance of this cooling system could be enhanced when the total dimension of thermoelectric module matched well with the …

Persistent link: https://www.econbiz.de/10011264368

Artificial neural network model to predict the diesel electric generator performance and exhaust emissions

Ganesan, P.; Rajakarunakaran, S.; Thirugnanasambandam, M.; … - In: Energy 83 (2015) C, pp. 115-124

that the ANN models are reliable tools for the prediction of the performance and exhaust emissions of DGs. …

Persistent link: https://www.econbiz.de/10011264370

Experimental investigation of integrated refrigeration system (IRS) with gas engine, compression chiller and absorption chiller

Sun, Z.G. - In: Energy 33 (2008) 3, pp. 431-436

the gas engine operates the absorption refrigeration cycle, which provides additional cooling. The performance of the IRS …

Persistent link: https://www.econbiz.de/10010807326