Economic Analysis of Energy Saving Practices in Irrigation

1983 ◽  
Vol 26 (6) ◽  
pp. 1784-1792 ◽  
Author(s):  
James R. Gilley ◽  
Raymond J. Supalla
Keyword(s):  
Economic Analysis ◽  
Energy Saving

The Energy-Saving Diagnosis of PWR Nuclear Power Station Based on the Thermo-Economic Analysis Model

2010 ◽  
Author(s):  
Juan Chen ◽  
Tao Zhou ◽  
Ke Ran
Keyword(s):  
Graph Theory ◽  
Economic Analysis ◽  
Energy Saving ◽  
Nuclear Power Station ◽  
Nuclear Power ◽  
Exergy Analysis ◽  
Performance Estimation ◽  
Structure Theory ◽  
Analysis Model ◽  
Power Station

Exergy analysis model of PWR nuclear power station is developed in which signal flowing graph theory is introduced to set up the relation equations between input exergy flow and output exergy flow. Then, combining with resource distribution between different components, thermo-economic analysis model is obtained by setting up unit thermo-economic cost equations of different components with productive structure graph. Taking Daya Bay as an example, exergy analysis and thermal-economic analysis are put forward with detailed distribution of exergy and investment cost. Finally, aimed at energy-saving, static diagnosis is performed in two levels: energy conservation and cost reduction, and on this basis dynamic diagnosis is developed through sensitivity analysis considering different influence factors such as main steam temperature, fuel price, construction capital investment, post treatment cost and so on. The introduction of signal flow graph theory and thermal-economic structure theory is helpful to do performance estimation with high speed and good accuracy. It provides a new way for rapid optimization and offers an effective theoretical method for energy-saving of PWR nuclear power station including advanced reactor such as AP1000.

scholarly journals Thermo-economic analysis of an efficient lignite-fired power system integrated with flue gas fan mill pre-drying

2018 ◽  
Author(s):  
Junjie Yan ◽  
Xiaoqu Han ◽  
Jiahuan Wang ◽  
Ming Liu ◽  
Sotirios Karellas
Keyword(s):  
Moisture Content ◽  
Economic Analysis ◽  
Power System ◽  
Energy Saving ◽  
Flue Gas ◽  
Power Plants ◽  
Waste Heat ◽  
Low Rank ◽  
Analysis Model ◽  
Energy Saving Potential

Lignite is a domestic strategic reserve of low rank coals in many countries for its abundant resource and competitive price. Combustion for power generation is still an important approach to its utilization. However, the high moisture content always results in low efficiencies of lignite-direct-fired power plants. Lignite pre-drying is thus proposed as an effective method to improve the energy efficiency. The present work focuses on the flue gas pre-dried lignite-fired power system (FPLPS), which is integrated with fan mill pulverizing system and waste heat recovery. The thermo-economic analysis model was developed to predict its energy saving potential at design conditions. The pre-drying upgrade factor was defined to express the coupling of pre-drying system with boiler system and the efficiency improvement effect. The energy saving potential of the FPLPS, when applied in a 600 MW supercritical power unit, was determined to be 1.48 %-pts. It was concluded that the improvement of boiler efficiency mainly resulted from the lowered boiler exhaust temperature after firing pre-dried low moisture content lignite and the lowered dryer exhaust gas temperature after pre-heating the boiler air supply. Keywords: lignite; pre-drying; thermodynamic analysis; thermo-economics

An Economic Analysis on Regeneration Concrete Hollow Block

2012 ◽  
Vol 204-208 ◽  
pp. 3186-3189
Author(s):  
Song Gu ◽  
Chao Wang ◽  
Lu Li ◽  
Yu Ping Gan ◽  
Kai Lin
Keyword(s):  
Economic Analysis ◽  
Energy Saving ◽  
High Efficiency ◽  
Building Energy ◽  
Economic Benefits ◽  
Wall Material ◽  
Green Wall ◽  
Waste Concrete ◽  
Hollow Block ◽  
Building Energy Saving

With the development of wall innovation, the appearance of regeneration concrete hollow block has an important operation significance for building energy saving and high efficiency recycling of waste concrete. The paper introduces a new green wall material—regeneration concrete hollow block and analyzes the feasibility of its application from the point of macroscopic and technical economy. The paper forecasts the direct and indirect economic benefits after its application in order to promote the extension of regeneration concrete hollow block.

SHIP DATA DRIVEN PROPULSION MODELS & WIND-BASED PROPULSION TECHNOLOGY

2019 ◽  
Author(s):  
J. E. Buckingham ◽  
D. R. Pearson ◽  
E Storey
Keyword(s):  
Economic Analysis ◽  
Energy Saving ◽  
Business Case ◽  
Data Driven ◽  
First Principle ◽  
Baseline Model ◽  
Ship Model ◽  
Fuel Savings ◽  
Monetary Savings ◽  
Ship Performance

This paper presents the approach taken to develop and align a parametric ship model to metocean data and known ship performance data measured at sea, and the use of this aligned baseline model in conjunction with first principle models of wind-based Energy Saving Technologies (EST) to derive the benefit of such technologies over specific voyages. The EST compared in this paper are: • Flettner rotors • Wingsails • Turbosails A specific voyage conditions are studied for a given ship in order to provide a broad and representative range of seagoing conditions for the vessel, with the model then being used to derive the relative fuel savings from the EST. This output can then be run-through a techno-economic analysis to derive the monetary savings and inform a potential business case for installation of such EST. The vessel presented in this paper is a 61,000 dwt bulker, which has served as a demonstrator vessel in previous BMT publications and is a well understood baseline for comparison.

Energy saving technique for cooling dominated academic building: Techno-economic analysis of its application

2014 ◽  
Vol 132 ◽  
pp. 192-199 ◽  
Author(s):  
Syed Ihtsham ul Haq Gilani ◽  
Mohd Shiraz Aris ◽  
Petrus Tri Bhaskoro
Keyword(s):  
Economic Analysis ◽  
Energy Saving ◽  
Energy Saving Technique ◽  
Academic Building

scholarly journals Energy saving and economic analysis of a new hybrid radiative cooling system for single-family houses in the USA

2018 ◽  
Vol 224 ◽  
pp. 371-381 ◽  
Author(s):  
Kai Zhang ◽  
Dongliang Zhao ◽  
Xiaobo Yin ◽  
Ronggui Yang ◽  
Gang Tan
Keyword(s):  
Economic Analysis ◽  
Energy Saving ◽  
Cooling System ◽  
Radiative Cooling ◽  
Single Family ◽  
The Usa

Energy Consumption and Economic Analysis to Residential Building Meeting the Criterion of 65% Energy Saving in Zhangjiakou

2011 ◽  
Vol 225-226 ◽  
pp. 239-242 ◽  
Author(s):  
Hong Lei Ma ◽  
Jian Hui Niu
Keyword(s):  
Energy Consumption ◽  
Economic Analysis ◽  
Energy Saving ◽  
Residential Building ◽  
Building Energy ◽  
Simulation Software ◽  
Design Standard ◽  
Third Stage ◽  
Building Energy Saving ◽  
Saving Effect

An energy saving residential building in Zhangjiakou was took as research object, which was designed and constructed according to the criterion of 65% energy saving of the third stage, utilizing simulation software Dest, which was developed by Qinghua University, energy consumption simulation and economic analysis were done to the building. The results show that compared with the former residence which was built according to the non-energy saving design, the implementation of new design standard for building energy saving can not only achieve better energy saving effect, but also its payback period is short, so the new design standard for building energy saving is worth spreading.

Influence of Integrating Induced Fan and Pressurization Fan on Energy-Saving of 300 MW Coal-Fired Power Units

2014 ◽  
Vol 1070-1072 ◽  
pp. 1727-1730
Author(s):  
Wen Guang Zheng ◽  
Bo Liu
Keyword(s):  
Economic Analysis ◽  
Power Consumption ◽  
Energy Saving ◽  
Power Unit ◽  
Consumption Rate ◽  
Lower Power ◽  
Induced Draft Fan

Through integrating the induced draft fan and desulphurization pressurization fan, the retrofited 300 MW coal-fired power unit can achieve lower power consumption rate. The operation economy has been improved, and it is also found that this retrofit can benefit the operation of both the boiler and gas desulfurization system. This work can provide valuable reference for the economic analysis of similar units.

Thermo-Economic Analysis of an Intercooled, Reheat and Recuperated Gas Turbine for Cogeneration Applications: Part I — Base Load Operation

2000 ◽  
Author(s):  
R. Bhargava ◽  
M. Bianchi ◽  
G. Negri di Montenegro ◽  
A. Peretto
Keyword(s):  
Economic Analysis ◽  
Energy Saving ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Waste Heat ◽  
Pressure Ratio ◽  
Gas Temperature ◽  
Minimum Value ◽  
Maximum Value ◽  
Cogeneration System

This paper presents a thermo-economic analysis of an intercooled, reheat (ICRH) gas turbine, with and without recuperation, for cogeneration applications. The optimization analyses of thermodynamic parameters have permitted to calculate variables, such as low-pressure compressor pressure ratio, high-pressure turbine pressure ratio and gas temperature at the waste heat recovery unit inlet while maximizing electric efficiency and “Energy Saving Index”. Subsequently, the economic analyses have allowed to evaluate return on the investment, and the minimum value of gross payout period, for the cycle configurations of highest thermodynamic performance. In the present study three sizes (100 MW, 20 MW and 5 MW) of gas turbines have been examined. The performed investigation reveals that the maximum value of electric efficiency and “Energy Saving Index” is achieved for a large size (100 MW) recuperated ICRH gas turbine based cogeneration system. However, a non-recuperated ICRH gas turbine (of 100 MW) based cogeneration system provides maximum value of return on the investment and the minimum value of gross payout period compared to the other gas turbine cycles, of the same size and with same power to heat ratio, investigated in the present study. A comprehensive thermo-economic analysis methodology, presented in this paper, should provide useful guidelines for preliminary sizing and selection of gas turbine cycle for cogeneration applications.

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