Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Energy saving

Improving Energy Saving in Conventional Pneumatic Systems by Using Air Booster Experimentally

Jafar Mehdi Hassan; Majid Ahmed Oleiwi; Amer Abed Mansour; Walaa Mousa Hashim

Engineering and Technology Journal, 2015, Volume 33, Issue 8, Pages 1012-2026

Pneumatic actuators are widely used in industry and many other applications, whereas low energy efficiency has been recognized as a critical drawback compared with corresponding hydraulic and electrical actuators. The paper presents a study to improve the performance and energy efficiency of the traditional pneumatic drive with vertical load 50N, by added air booster type IPR (Input Pressure Reduce) to the.Four supply pressures used 2, 4, 6 and 8 bar, compared with the traditional control of the motion of the asymmetric cylinder in which maximum energy saving obtained at 6 bar16.7%.

Sub-Cooling Auxiliary System for Performance Enhancement of Main Refrigeration System

Mustafa W. Hamadalla; Fawziea M. Hussien; Ahmed J. Hamad

Engineering and Technology Journal, 2015, Volume 33, Issue 8, Pages 1798-1812

In presentwork, a sub-coolingauxiliary system is integrated with vapour compression refrigeration system to predict the performance characteristics and energy saving of the system. An experimental investigation was performed to determine the performance parameters at various operating conditions using two types of refrigerants, R-134a and zeotropic mixed refrigerant R-404A.Investigating the results hasshowed that, the enhancement in performance of the refrigeration system with sub-cooling circuit compared with that for system without sub-cooling for R-134a was about 5% increase in RE, 14% optimization in COPand 2.8% energy saving for different thermal loads applied on the evaporator.While for R-404A, the increase in RE was 4%, the optimization in COP was about 13% and 3.7%energy saving. There is a significant improvement in the performance of the system with R-404A compared with that forR-134a at the same operating conditions.