scholarly journals ESTIMATION OF ANNUAL OPERATION RESULTS AND ENERGY SAVING EFFECT BASED ON FIELD MEASUREMENT AND NUMERICAL SIMULATION

2014 ◽  
Vol 79 (703) ◽  
pp. 777-784 ◽  
Author(s):  
Tomoya SAKAMOTO ◽  
Yuta TOMIYASU ◽  
Yasuyuki SHIRAISHI ◽  
Yoshie UCHIKAWA ◽  
Yasushi NAKAMURA
2013 ◽  
Vol 78 (686) ◽  
pp. 351-357
Author(s):  
Ryuichi YASUNAGA ◽  
Tomoya SAKAMOTO ◽  
Yasuyuki SHIRAISHI ◽  
Yoshie UCHIKAWA ◽  
Yasushi NAKAMURA

2014 ◽  
Vol 919-921 ◽  
pp. 1744-1747
Author(s):  
Kun Ru Ma ◽  
Xin Wang

There are often people and goods in and out of the dinning room door, so the door is often open. Heating and air conditioning construction to save energy and to prevent the outdoor air form influencing on indoor environment, set up the air curtain at the entrance of the dinning room to stop outdoor air, the frequently-used air curtain is beam type of air curtain.The project in view of the dinning room of the new campus of hebei university of science and technology, sets up air curtain physical model of the ground floor dining room door at the first area, and carry on reasonable simplification, make sure the numerical simulation calculation area and the sealing condition of air curtain. Then set up physical model for wind pressure, multiply of hot pressure and the local hot pressure at the dinning room door of the air curtain air flow in CFD method. Through the numerical simulation for different jet velocity of the hot air curtain, analysis the temperature field, velocity field, heat loss,heat load parameter, etc. and demonstrate the energy saving effect, and provide reference basis for the selection of air curtain.


2014 ◽  
Vol 548-549 ◽  
pp. 1739-1743
Author(s):  
Kun Ru Ma ◽  
Yi Jun Wang ◽  
Xin Wang

The dining room door with going out and coming in of people and goods is often opened, heating and air-conditioning building in order to energy-saving and preventing the outdoor air on indoor environment influence, install a set of air curtain at the entrance of the dining room door to stopping the outdoor air, commonly used air curtain is ceiling type air curtain. This article in view of the gate of one area, a layer of the dining room of Hebei University of science and technology of a new campus area set up physical model of air curtain and reasonable simplification, determining the calculation area of the numerical simulation and air curtain close condition. Then adopting the UFD method to wind pressure, hot pressure and the air curtain air flowing of the local hot pressure stack of main entrance set up physical model, through the numerical simulation of air curtain different jet angle, demonstrate the air energy-saving effect, provide the reference for the choice of the air curtain.


2014 ◽  
Vol 675-677 ◽  
pp. 1735-1738
Author(s):  
Li Peng Dong ◽  
Tian Xie ◽  
Fang Zhang ◽  
Sheng Nan Ma ◽  
Xiao Ling Wang ◽  
...  

Abstract. Combined with the Jiangbei wastewater treatment plant project in Yushu city, Jilin province, China, the design scheme, the system and the function for the automatic control system were summarized. The problems of the great change of water quality and quantity, dissatisfaction of design load and other issues existed in WWTP were solved. From the aspects of control strategy and microbial reaction mechanism, etc., the energy consumption for each processing unit under the control of automatic control system was analyzed. And the system performance and power consumption were evaluated by the WWWP’s operation results. The results show that: the quality of effluent is stable and the energy saving effect is remarkable by the use of automatic control system.


2015 ◽  
Vol 49 (5) ◽  
pp. 58-69 ◽  
Author(s):  
Yu Sun ◽  
Yu-min Su ◽  
Hai-zhou Hu

AbstractTo analyze the energy-saving effect of a twisted rudder, this work presents the simulated and experimental results of propeller-rudder systems. In this article, a surface panel method (SPM) and computational fluid dynamics (CFD) are introduced to simulate the hydrodynamic performance of propeller-rudder systems. The thrust coefficient Kt, torque coefficient Kq, open-water efficiency η of the propeller, and thrust coefficient Kr of the rudder as a function of the advance coefficient J are obtained and plotted. The energy-saving effect of the twisted rudder is analyzed by comparing the results of numerical simulation and a cavitation tunnel experiment. The experimental energy-saving effect is 2.23% at the design advance coefficient J = 0.8. The pressure distributions of the propeller blade and rudder are plotted by two methods, and the difference of the force on an ordinary rudder and a twisted rudder is discussed. This study improved the experimental twisted rudder model. The change makes the rudder take advantage of propeller wake and improves the energy-saving effect of a twisted rudder. After improvement, the energy-saving effects obtained by the two methods are 0.448% and 0.441%. To analyze the energy-saving mechanism, this study compares the pressure distributions and efficiencies of different systems.


2014 ◽  
Vol 68 (6) ◽  
pp. 638-643
Author(s):  
Makoto Matsushita ◽  
Takefumi Ide
Keyword(s):  

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