scholarly journals Comparison of Different Technologies for Improving Commutation Failure Immunity Index for LCC HVDC in Weak AC Systems

2015 ◽  
Author(s):  
J. Burr ◽  
S. Finney ◽  
C. Booth
Keyword(s):  
Commutation Failure ◽  
Ac Systems ◽  
Immunity Index

A Dynamic Series Voltage Compensator for the Mitigation of LCC-HVDC Commutation Failure

2021 ◽  
pp. 1-1
Author(s):  
Lingxi Hou ◽  
Shuqing Zhang ◽  
Yingdong Wei ◽  
Biao Zhao ◽  
Qirong Jiang
Keyword(s):  
Voltage Compensator ◽  
Commutation Failure ◽  
Dynamic Series

scholarly journals A Controllable Thyristor-Based Commutation Failure Inhibitor for LCC-HVDC Transmission Systems

2021 ◽  
Vol 36 (4) ◽  
pp. 3781-3792
Author(s):  
Sohrab Mirsaeidi ◽  
Dimitrios Tzelepis ◽  
Jinghan He ◽  
Xinzhou Dong ◽  
Dalila Mat Said ◽  
...  
Keyword(s):  
Transmission Systems ◽  
Hvdc Transmission ◽  
Commutation Failure

Performance Improvement of Membrane Energy Exchanger using Ultrasound for HVAC Application

2021 ◽  
pp. 1-29
Author(s):  
Gurubalan Annadurai ◽  
Maiya M.P. ◽  
Patrick Geoghegan ◽  
Carey Simonson
Keyword(s):  
Air Conditioning ◽  
Energy Recovery ◽  
Mass Transfer Process ◽  
Porous Membrane ◽  
Air Conditioning System ◽  
Energy Saving Potential ◽  
Recovery Processes ◽  
Additional Resistance ◽  
Membrane Energy ◽  
Ac Systems

Abstract Air conditioning (AC) systems consume the maximum proportion of the total electricity used in the building sector. The demand of AC systems is expected to increase exponentially in the coming years due to various reasons such as climate change, increasing affordability and increase in living floor space. Membrane-based liquid desiccant AC system along with energy recovery ventilating equipment is considered as a prospective alternative to the conventional air conditioning system (CACS) and has the potential to meet the increasing current and future AC demand in a sustainable manner. Its efficiency and energy saving potential with respect to CACS depends on the performance of the membrane-based dehumidifier, regenerator and energy recovery ventilating equipment which are commonly referred to as membrane energy exchangers (MEEs). MEE is an indirect exchanger type in which the working streams are separated by a porous membrane. This intermediate membrane creates an additional resistance for the heat and mass transfer process in the MEE. To reduce the resistance, this study experimentally and numerically investigates the influence of ultrasound on the performance of the MEE for dehumidification, humidification (applicable for membrane-based evaporative cooling and desiccant regeneration devices) and energy recovery processes. It is found that the vibration due to ultrasound has the potential to improve the effectiveness of the MEE by 55% in the dehumidification process and by 65% in the humidification and energy recovery processes.

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