electric power output
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Author(s):  
Benjamin M. Adams ◽  
Daniel Vogler ◽  
Thomas H. Kuehn ◽  
Jeffrey M. Bielicki ◽  
Nagasree Garapati ◽  
...  

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Desh B. Singh ◽  
Gagan Bansal ◽  
Haridwar Prasad ◽  
Ashis Mallick ◽  
Navneet Kumar ◽  
...  

Abstract In the current research, the sensitivity analysis of N alike in parts covered photovoltaic thermal compound parabolic concentrator collectors integrated single-slope solar distiller unit is performed and examined. The analysis is done using computational programming in matlab (month: May and location: New Delhi). The parametric values of potable water and DC electric power outputs have been figured for different values of mass flow rate (MFR), number of collectors (N), packing factor (PF), and water depth (WD). Elaborative observations says that the value of potable water output declines and DC electric power output increases with the increase in MFR for the considered values of N, PF, and WD. Also the values of DC electric power increases by 81.63% if packing factor is increased from 0.4 to 0.6 for the considered values of MFR, N, and WD. Based on the results of all the analysis, sensible and effective conclusions are made.


Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 787
Author(s):  
Yan Zhang ◽  
Quan Lyu ◽  
Yang Li ◽  
Na Zhang ◽  
Lijun Zheng ◽  
...  

The issue of real-time deep down-regulation ancillary service has received increasing attention in the Northeast of China. Participation of combined heat and power plants with multitype units and flexible heating devices in the market is investigated. This paper establishes a model of feasible operating region and the coal consumption function for the combined heat and power plant. An internal optimal dispatch model and the minimum overall electric power output model for the plant satisfying a given heat load are presented. Furthermore, the models of total cost for down-regulation and average cost for deep down-regulation in two levels are established. These models are validated based on the realistic data of the plant in the Northeast of China. In case studies, the influence factors and change rules of the minimum electric power output, the total cost, and the average cost of plants are analyzed.


2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Nan Chen ◽  
Vishwas Bedekar

The objective of the research is to design a high power energy harvester device through a two-piece trapezoidal geometry approach. The performance of the composite two-piece trapezoidal piezoelectric PZT-PZN polycrystalline ceramic material is simulated using COMSOL Multiphysics. Results are analysed using the series configuration of a two-piece trapezoidal composite bimorph cantilever which vibrates at the first fundamental frequency. The two-piece trapezoidal composite beam designs resulted in a full-width half-maximum electric power bandwidth of 2.5 Hz while providing an electric power density of 16.81 mW/cm3 with a resistive load of 0.08 MΩ. The authors believe that these results could help design a piezoelectric energy harvester to provide local energy source which provides high electric power output.


2019 ◽  
Vol 12 (1) ◽  
pp. 276 ◽  
Author(s):  
Jangwon Suh ◽  
Yonghae Jang ◽  
Yosoon Choi

An interest in floating photovoltaic (PV) is growing drastically worldwide. To evaluate the feasibility of floating PV projects, an accurate estimation of electric power output (EPO) is a crucial first step. This study estimates the EPO of a floating PV system and compares it with the actual EPO observed at the Hapcheon Dam, Korea. Typical meteorological year data and system design parameters were entered into System Advisor Model (SAM) software to estimate the hourly and monthly EPOs. The monthly estimated EPOs were lower than the monthly observed EPOs. This result is ascribed to the cooling effect of the water environment on the floating PV module, which makes the floating PV efficiency higher than overland PV efficiency. Unfortunately, most commercial PV software, including the SAM, was unable to consider this effect in estimating EPO. The error results showed it was possible to estimate the monthly EPOs with an error of less than 15% (simply by simulation) and 9% (when considering the cooling effect: 110% of the estimated monthly EPOs). This indicates that the approach of using empirical results can provide more reliable estimation of EPO in the feasibility assessment stage of floating PV projects. Furthermore, it is necessary to develop simulation software dedicated to the floating PV system.


MTZ worldwide ◽  
2019 ◽  
Vol 80 (11) ◽  
pp. 78-83
Author(s):  
Hannes Marlok ◽  
Andreas Pfeifer ◽  
Michael Hötger ◽  
Michael Bucher

Entropy ◽  
2019 ◽  
Vol 21 (6) ◽  
pp. 619 ◽  
Author(s):  
Ruijie Wang ◽  
Guohua Kuang ◽  
Lei Zhu ◽  
Shucheng Wang ◽  
Jingquan Zhao

The performance of a 300 kW organic Rankine cycle (ORC) prototype was experimentally investigated for low-grade waste heat recovery in industry. The prototype employed a specially developed single-stage radial turbine that was integrated with a semi-hermetic three-phase asynchronous generator. R245fa was selected as the working fluid and hot water was adopted to imitate the low-grade waste heat source. Under approximately constant cooling source operating conditions, variations of the ORC performance with diverse operating parameters of the heat source (including temperature and volume flow rate) were evaluated. Results revealed that the gross generating efficiency and electric power output could be improved by using a higher heat source temperature and volume flow rate. In the present experimental research, the maximum electric power output of 301 kW was achieved when the heat source temperature was 121 °C. The corresponding turbine isentropic efficiency and gross generating efficiency were up to 88.6% and 9.4%, respectively. Furthermore, the gross generating efficiency accounted for 40% of the ideal Carnot efficiency. The maximum electric power output yielded the optimum gross generating efficiency.


2019 ◽  
Vol 12 (2) ◽  
pp. 30-35
Author(s):  
Hannes Marlok ◽  
Andreas Pfeifer ◽  
Michael Hötger ◽  
Michael Bucher

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