scholarly journals Experimental Study on Energy Efficiency of Pneumatic Booster Valves with Energy Recovery

2020 ◽  
Vol 13 (1) ◽  
pp. 1-8
Author(s):  
Jongha LIM ◽  
Kohei IIDA ◽  
Kotaro TADANO ◽  
Toshiharu KAGAWA
Keyword(s):  
Experimental Study ◽  
Energy Efficiency ◽  
Energy Recovery

scholarly journals Dimensionless Analysis on the Characteristics of Pneumatic Booster Valve with Energy Recovery

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Fan Yang ◽  
Kotaro Tadano ◽  
Gangyan Li ◽  
Toshiharu Kagawa
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Energy Recovery ◽  
Operational Parameters ◽  
Local Pressure ◽  
Air Power ◽  
Improve Energy Efficiency ◽  
Dimensionless Analysis ◽  
Air Supply ◽  
Save Energy

Factories are increasingly reducing their air supply pressures in order to save energy. Hence, there is a growing demand for pneumatic booster valves to overcome the local pressure deficits in modern pneumatic systems. To further improve energy efficiency, a new type of booster valve with energy recovery (BVER) is proposed. The BVER principle is presented in detail, and a dimensionless mathematical model is established based on flow rate, gas state, and energy conservation. The mathematics model was transformed into a dimensionless model by accurately selecting the reference values. Subsequently the dimensionless characteristics of BVER were found. BVER energy efficiency is calculated based on air power. The boost ratio is found to be mainly affected by the operational parameters. Among the structural ones, the recovery/boost chamber area ratio and the sonic conductance of the chambers are the most influential. The boost ratio improves by 15%–25% compared to that of a booster valve without an energy recovery chamber. The efficiency increases by 5%–10% depending on the supply pressure. A mathematical model is validated by experiment, and this research provides a reference for booster valve optimisation and energy saving.

scholarly journals Energy Balance in Wastewater Systems with Energy Recovery: A Portuguese Case Study

2021 ◽  
Vol 6 (10) ◽  
pp. 141
Author(s):  
Catarina Jorge ◽  
Maria do Céu Almeida ◽  
Dídia Covas
Keyword(s):  
Energy Efficiency ◽  
Energy Balance ◽  
Energy Recovery ◽  
Real Life ◽  
Wet Season ◽  
Current Case ◽  
Total Input ◽  
Wastewater Systems ◽  
Regional Reference

This paper presents and discusses the application of a novel energy balance scheme for assessing energy efficiency in wastewater systems. The energy balance is demonstrated with a Portuguese real-life case study, using mathematical modelling to estimate the different energy components and to compute two energy efficiency indices. The total inflow intrinsic energy can represent a significant amount (>95%) of the total energy used in systems mainly composed of gravity sewers. The total input energy is significantly (four-times) higher in the wet season than in the dry season, mostly due to undue inflows (e.g., direct rainfall and infiltration). The potential for energy recovery strongly depends on the available head and flow rate at the delivery point, being 0.01 kWh/m3 in the current case, with a project payback period of 4 years. The energy balance components and the respective energy efficiency indices strongly depend on the considered reference elevation. Thus, a unique regional reference elevation is recommended in the calculations.

Experimental study of organic Rankine cycle with three-fluid recuperator for cryogenic cold energy recovery

Energy ◽  
2021 ◽  
pp. 122550
Author(s):  
Zhen Tian ◽  
Wanlong Gan ◽  
Zhixin Qi ◽  
Molin Tian ◽  
Wenzhong Gao
Keyword(s):  
Experimental Study ◽  
Energy Recovery ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Cold Energy

scholarly journals A numerical and experimental study on the energy efficiency of a regenerative Heat and Mass Exchanger utilizing the counter-flow Maisotsenko cycle

2019 ◽  
Vol 14 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Ali Mohammad Ez Abadi ◽  
Meisam Sadi ◽  
Mahmood Farzaneh-Gord ◽  
Mohammad Hossein Ahmadi ◽  
Ravinder Kumar ◽  
...  
Keyword(s):  
Experimental Study ◽  
Energy Efficiency ◽  
Counter Flow ◽  
Regenerative Heat ◽  
Mass Exchanger

scholarly journals Experimental Study on the All-fresh-air Handling Unit with Exhaust Air Energy Recovery

2018 ◽  
Vol 152 ◽  
pp. 431-437 ◽  
Author(s):  
Han Fengxia ◽  
Zhang Zhongbin ◽  
Huang Hu ◽  
Chen Zemin
Keyword(s):  
Experimental Study ◽  
Energy Recovery ◽  
Air Handling Unit

Durability Research of Thermal Insulation Glazed Hollow Bead Concrete

2013 ◽  
Vol 639-640 ◽  
pp. 350-353 ◽  
Author(s):  
Xiao Hong Zheng ◽  
Zhu Li ◽  
Yuan Zhen Liu ◽  
Shang Song Qin
Keyword(s):  
Experimental Study ◽  
Energy Efficiency ◽  
Theoretical Analysis ◽  
Thermal Insulation ◽  
Raw Materials ◽  
Building Energy ◽  
Building Energy Efficiency ◽  
Insulation Material ◽  
Mixing Proportion ◽  
Good Workability

The durability of thermal insulation glazed hollow bead concrete, which is a kind of structure self-thermal insulation material produced in the background of building energy efficiency, has been systematically researched in order to make it with a good workability. Theoretical analysis and experimental study have been made from the raw materials and construction mixing proportion in the basis of the analysis to the influencing factors of its durability so as to can improve its durability.

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