scholarly journals Economic Optimization of the Energy Supply for a Logistics Center Considering Variable-Rate Energy Tariffs and Integration of Photovoltaics

2019 ◽  
Vol 9 (21) ◽  
pp. 4711 ◽  
Author(s):  
Alex Ximenes Naves ◽  
Victor Tulus ◽  
Elaine Garrido Vazquez ◽  
Laureano Jiménez Esteller ◽  
Assed Naked Haddad ◽  
...  
Keyword(s):  
Life Cycle ◽  
Energy Supply ◽  
Economic Optimization ◽  
Pv System ◽  
Logistics Center ◽  
Life Cycle Perspective ◽  
Electrical Demand ◽  
System Configurations ◽  
Supply Systems ◽  
Energy Surplus

The energy supplied by photovoltaic (PV) panels connected to the grid creates more flexibility for energy management; however, oversizing the PV system may result in an energy surplus, an essential factor to be considered during energy efficiency optimization. The economic analysis of energy supply systems for buildings and industry should include a detailed feasibility analysis and a life cycle perspective. Simulations were performed to quantify the potential savings when the excess of PV energy (surplus) is supposed to be exported to the grid by considering the net metering and net billing approaches. Our objective was to evaluate the electrical demand of a logistics center with pre-design modeling and simulation, and determine the adequate system configurations by considering the life cycle costing (LCC). We established a baseline and three alternative economic scenarios for optimization. Combining the use of TRNSYS 180 Simulation Studio and its optimization library component, GenOp (Generic Optimization Program), we simulated different options of grid energy contracts considering the variable tariffs and the integration with PVs. Based on the LCC, a single-objective optimization (SOO) process was performed. This approach allowed us to envisage possible configurations, reducing up to a quarter of annual grid energy consumption that represents savings of around 21% for the LCC in a timeframe of 20 years, reaching up to 39% when the export of the PV surplus energy is considered. The payback period of investments is below six years for the optimal scenarios.

scholarly journals LIFE CYCLE MULTI-CRITERIA ANALYSIS OF ALTERNATIVE ENERGY SUPPLY SYSTEMS FOR A RESIDENTIAL BUILDING / ALTERNATYVIŲJŲ DAUGIABUČIO NAMO APRŪPINIMO ENERGIJA SISTEMŲ GYVAVIMO CIKLO DAUGIAKRITERĖ ANALIZĖ

2013 ◽  
Vol 5 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Artur Rogoža
Keyword(s):  
Life Cycle ◽  
Energy Supply ◽  
Alternative Energy ◽  
District Heating ◽  
Residential Building ◽  
Heat Pumps ◽  
Base Case ◽  
Alternative Systems ◽  
Multi Criteria Analysis ◽  
Supply Systems

The article analyses energy supply alternatives for a partially renovated residential building. In addition to the existing district heating (base case) alternative systems, gas boilers, heat pumps (air-water and ground-water), solar collectors, solar cells, and combinations of these systems have been examined. Actual heat consumption of the building and electricity demand determined by the statistical method are used for simulating the systems. The process of simulation is performed using EnergyPro software. In order to select an optimal energy supply option, the life cycle analysis of all systems has been carried out throughout a life span of the building, and the estimated results of energy, environmental and economic evaluation have been converted into non-dimensional variables (3E) using multi–criteria analysis. Article in Lithuanian. Santrauka Nagrinėjamos iš dalies renovuoto daugiabučio gyvenamojo pastato aprūpinimo energija alternatyvos. Be esamo centralizuotojo šilumos tiekimo (bazinis variantas), tiriama alternatyviosios sistemos: dujiniai katilai, šilumos siurbliai (oras– vanduo ir gruntas–vanduo), saulės kolektoriai, saulės elementai ir šių sistemų deriniai. Modeliuojant sistemas, naudojami faktiniai pastato šilumos suvartojimo ir statistiniu būdu nustatyti elektros poreikių duomenys. Sistemų modeliavimas atliekamas EnergyPro programa. Siekiant nustatyti optimalų aprūpinimo energija variantą, analizuojamas visų sistemų gyvavimo ciklas per visą pastato gyvavimo trukmę, o gauti energinio, ekologinio ir ekonominio vertinimų rezultatai daugiakriterės analizės būdu perskaičiuojami į nedimensinius rodiklius (3E).

scholarly journals Exergy and economic optimization of complex power supply systems

2020 ◽  
pp. 5-14
Author(s):  
B. Draganov ◽  
◽  
A. Mishenko ◽  
Keyword(s):  
Energy Supply ◽  
Renewable Energy Sources ◽  
Optimal Solution ◽  
Oriented Graph ◽  
Energy Sources ◽  
Economic Optimization ◽  
Economic Costs ◽  
Energy Supply System ◽  
Supply Systems ◽  
Energy Supply Systems

The optimization of energy supply system becomes especially important problem in those cases where there are several different energy sources, including, e.g., renewable energy sources, and several energy sinks of different power. This problems can be solved with the use of a graph of exergy and economic expenditures for the pairwise interaction of flows. The purpose of the study is to specify the concept of exergy schedule and economic costs applied to energy supply systems (ESS). We shall interpret a graph of the exergy and economic expenditures of an ESS, having an arbitrary structure, as a bipartite graph Z such that the set of its nodes C corresponds to the heating H and heated C flows, and the set of its arcs D to a possible distribution of the exergy and economic expenditures in the corresponding elements of this ESS in the course of interaction between the heating and heated flows. A symmetric graph represents an oriented graph, whose arcs can be grouped into pairs of parallel but oppositely directed arcs. Such graphs, having no isolated nodes, are convenient for studying complex interrelated systems. If we have determined the optimal pair of elements (аі, aj), corresponding to the sequence of nodes, beginning from the root of the foretree and finishing by a suspended node, giving a matrix of unit dimension, then the obtained sequence of elements forms a single-contour system with the minimum level of exergy and economic expenditure. For finding the optimal solution it is advisable to use the method of branches and boundaries, which enables one to improve the solution simpler than with the application of different methods of exergy analysis.

Risk based life cycle assessment conceptual framework for energy supply systems in large buildings

2015 ◽  
Vol 107 ◽  
pp. 291-309 ◽  
Author(s):  
Nasser Ayoub ◽  
Farayi Musharavati ◽  
Shaligram Pokharel ◽  
Hossam A. Gabbar
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Conceptual Framework ◽  
Energy Supply ◽  
Supply Systems ◽  
Energy Supply Systems

Techno-Economic Optimal Design and Application of SOFC Systems for Residential Micro-CHP Applications in the U.S.

2008 ◽  
Author(s):  
Robert J. Braun
Keyword(s):  
Life Cycle ◽  
Optimal Design ◽  
Life Cycle Cost ◽  
Operating Parameter ◽  
Cost Models ◽  
Economic Optimization ◽  
Single Family ◽  
Chp System ◽  
System Configurations ◽  
The U.S

A techno-economic optimization study investigating optimal design and operating strategies of solid oxide fuel cell (SOFC) micro-combined heat and power (CHP) systems for application in U.S. residential dwellings is carried out through modeling and simulation of various anode-supported planar SOFC-based system configurations. Five different SOFC system designs operating from either methane or hydrogen fuels are evaluated in terms of their energetic and economic performance and their overall suitability for meeting residential thermal-to-electric ratios. Life cycle cost models are developed and employed to generate optimization objective functions which are utilized to explore the sensitivity of the life cycle costs to various system design and economic parameters and to select optimal system configurations and operating parameters for eventual application in single-family, detached residential homes in the U.S. The study compares the results against a baseline SOFC-CHP system that employs primarily external steam reforming of methane. The results of the study indicate that system configurations and operating parameter selections that enable minimum life cycle cost while achieving maximum CHP system efficiency are possible. Life cycle cost reductions of over 30% and CHP efficiency improvements of nearly 20% from the baseline system are detailed.

PADDY RESIDUE AS FEEDSTOCK IN ELECTRICITY GENERATION: REDEMPTION OF LIFE CYCLE EMISSIONS AND COST ANALYSIS

2018 ◽  
Vol 13 (Number 1) ◽  
pp. 55-67
Author(s):  
Shafini M. Shafie ◽  
Zakirah Othman ◽  
N Hami
Keyword(s):  
Power Generation ◽  
Life Cycle ◽  
Cost Analysis ◽  
Positive Feedback ◽  
Energy Supply ◽  
Electricity Generation ◽  
Economic Sector ◽  
Ghg Emission ◽  
Coal Fuel ◽  
Biomass Resources

Malaysia has an abundance of biomass resources that can be utilised for power generation. One of them is paddy residue. Paddy residue creates ahuge potential in the power generation sector. The consumption of paddy residue can help Malaysia become less dependent on conventional sources of energy, mitigate greenhouse gas(GHG) emission, offer positive feedback in the economic sector, and at the same time, provide thebest solution for waste management activities. The forecast datafor 20 years on electricity generation wasused to calculate the GHG emission and its saving when paddy residue is used for electricity generation. The government’scost saving was also identified when paddy residue substituted coal fuel in electricity generation.This paper can provide forecast information so that Malaysia is able to move forward to apply paddy residue as feedstock in energy supply. Hopefully, the data achieved can encourage stakeholder bodies in the implementation of paddy residue inelectricity generation since there is apositive impact towardscost and emission saving.

Developing a Web-based Application for Energy Supply Systems

2019 ◽  
Vol 2 (3) ◽  
pp. 164-169
Author(s):  
Mohammed Faza ◽  
Maulahikmah Galinium ◽  
Matthias Guenther
Keyword(s):  
Energy Supply ◽  
Power Plants ◽  
Acceptance Testing ◽  
Design Activity ◽  
Unit Testing ◽  
Validity Testing ◽  
Energy Supply System ◽  
Time Series Modelling ◽  
Supply Systems ◽  
Energy Supply Systems

An energy supply system consists of a system of power plants and transmission anddistribution systems that supply electrical energy. The present project is limited to the modellingof the generation system. Its objective is the design and implementation of a web-basedapplication for simulating energy supply systems using the Laravel framework. The projectfocuses on six modules representing geothermal energy, solar energy, biopower, hydropower,storage, and fossil-based energy that are allocated to satisfy a given power demand. It isexecuted as a time series modelling for an exemplary year with hourly resolution. Thedevelopment of the software is divided into four steps, which are the definition of the userrequirements, the system design (activity, use case, system architecture, and ERD), the softwaredevelopment, and the software testing (unit testing, functionality testing, validity testing, anduser acceptance testing). The software is successfully implemented. All the features of thesoftware work as intended. Also, the software goes through validity testing using three differentinput data, to make sure the software is accurate. The result of the testing is 100% accuracy withrespect to the underlying model that was implemented in an excel calculation.

MODES FEATURES OF INTEGRATED ENERGY SUPPLY SYSTEMS OPERATION

2018 ◽  
Vol 2 (42) ◽  
pp. 61-67
Author(s):  
D. Derevianko ◽  
◽  
O. Yarmoliuk ◽  
O. Bespalyi ◽  
◽  
...  
Keyword(s):  
Energy Supply ◽  
Supply Systems ◽  
Energy Supply Systems
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