scholarly journals A tractable stochastic geometry model of coverage and an approach to energy efficiency estimation in LPWAN networks

2020 ◽  
Vol 33 (4) ◽  
pp. 211
Author(s):  
Edward Andrew Ball ◽  
Qiaoshou Liu
Keyword(s):  
Energy Efficiency ◽  
Stochastic Geometry ◽  
Geometry Model ◽  
Efficiency Estimation

scholarly journals Feasibility study and energy efficiency estimation of geothermal power station based on medium enthalpy water

2007 ◽  
Vol 11 (3) ◽  
pp. 135-142 ◽  
Author(s):  
Aleksandra Borsukiewicz-Gozdur ◽  
Wladyslaw Nowak
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Geothermal Energy ◽  
Geothermal Water ◽  
Power Station ◽  
Efficient Utilization ◽  
Geothermal Power Plant ◽  
Geothermal Power Station ◽  
Efficiency Estimation ◽  
Geothermal Power

In the work presented are the results of investigations regarding the effectiveness of operation of power plant fed by geothermal water with the flow rate of 100, 150, and 200 m3/h and temperatures of 70, 80, and 90 ?C, i. e. geothermal water with the parameters available in some towns of West Pomeranian region as well as in Stargard Szczecinski (86.4 ?C), Poland. The results of calculations regard the system of geothermal power plant with possibility of utilization of heat for technological purposes. Analyzed are possibilities of application of different working fluids with respect to the most efficient utilization of geothermal energy. .

scholarly journals New Approach for Refined Efficiency Estimation of Air Exchange Organization

2018 ◽  
Vol 7 (3.2) ◽  
pp. 591
Author(s):  
Volodymyr Dovhaliuk ◽  
Viktor Mileikovskyi ◽  
. .
Keyword(s):  
Energy Efficiency ◽  
Turbulence Intensity ◽  
Air Conditioning ◽  
Mechanical Energy ◽  
Air Distribution ◽  
New Approach ◽  
Air Volume ◽  
Efficiency Estimation ◽  
Special Approach ◽  
Air Exchange

In the modern conditions, energy efficiency is one of the most important world problems. One of the important factors influencing the overall energy efficiency of buildings is air distribution in rooms. Literature review shows different options of efficiency estimation of air exchange with significant limitations. Some of them have non-obvious physical meaning. Certain of them do not take into account possible room zoning. Consideration of turbulence intensity in the efficiency estimation was not found. In this work, we propose an approach to estimate the air exchange efficiency in different kind of rooms. It is a relation of minimum room demands and inlet air potentials. Additional definitions are introduced for the parameters and demands estimation. The mechanical energy of the air is used for the estimation, which includes the energy of averaged motion and turbulent pulsation. Special approach is offered for turbulence intensity computation for energy calculations. The example of efficiency estimation of air exchange in a museum room with constant air volume system of air conditioning is solved.  

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