An investigation on the impact of toolpath strategies and machine tool axes configurations on electrical energy demand in mechanical machining

2017 ◽  
Vol 92 (5-8) ◽  
pp. 2503-2509 ◽  
Author(s):  
Isuamfon F. Edem ◽  
Vincent A. Balogun ◽  
Paul T. Mativenga
Keyword(s):  
Machine Tool ◽  
Energy Demand ◽  
Electrical Energy ◽  
Mechanical Machining ◽  
The Impact

Impact of Rooftop PV Shading on Net Electrical Energy Demand of Buildings in Pakistan

2021 ◽  
Vol 3 (1) ◽  
pp. 45-49
Author(s):  
Muhammad Umar Maqbool ◽  
Arslan Dawood Butt ◽  
Abdul Rauf Bhatti ◽  
Yawar Ali Sheikh ◽  
Muhammad Waleed Asif
Keyword(s):  
Energy Demand ◽  
Heat Load ◽  
Layer Structure ◽  
Electrical Energy ◽  
Position Angle ◽  
Net Energy ◽  
Ambient Conditions ◽  
Pv System ◽  
Roof Structure ◽  
The Impact

This work performs a quantitative assessment of the impact of rooftop PV installation on building’s net energy demand using model of roof structure and steady state thermal simulations. For this purpose, roof structure typically used in Faisalabad, Pakistan is modeled with and without the shading effect due to a 395 W commercial rooftop PV setup. The simulated parameters include the impact of PV module’s dimensions, mounting position/angle alongside roof size and ambient conditions on heat load of air-conditioning system to maintain a temperature of 25 °C within building’s top floor. During the daylight hours of July, the heat load added by the roof on average reduces from 150.87 BTU/h/m2 without PV to 118.16 BTU/h/m2 with PV structure. This 20.05% reduction in energy demand has been achieved with July’s maximum daytime solar and infrared irradiances of 792.2 W/m2 and 466 W/m2 recorded at an average ambient temperature of 35.5 °C and wind speed of 2.75 m/s. This study provides valuable data on optimization of roof layer structure during building’s construction in anticipation of PV system installation at a later stage. Also developed techniques/methods to reduce building’s energy budget due to PV installation, can be valuable input for construction industry as well.

scholarly journals Town Massive Garbage –To - Energy for Maputo City in Mozambique Thesis

2020 ◽  
Vol 5 (7) ◽  
pp. 781-828
Author(s):  
Fernando Agostinho Dzeco ◽  
Dr. Anand Mohan
Keyword(s):  
Energy Demand ◽  
Electrical Energy ◽  
Environment Impact ◽  
The Sustainable Development ◽  
Coal Fuel ◽  
Maputo City ◽  
Development Goals ◽  
Value Of It ◽  
The Impact ◽  
The Town

The growing development nowadays on Mozambique is directly associated to the crescent industrialization and the increasing number of the population on enormous cities of the Nation, what needs more electrical energy and produce more garbage; uncontrolled and putting it in a challenge to face this scenario. Maputo City is facing huge problem with the Town Massive Garbage (TMG), without the structure to treat it, which deposited in the open dumpsite out of normal conditions, contributing for many diseases and environment impact, when it is burnt or it burns spontaneously, the subterranean water body is contaminated with leachate (methane); and proximately 72% of population or citizens have not electrical energy. The intention of this task is principally to turn the Town Massive Garbage into electrical energy in Maputo City the capital of the country, taking on the different technologies according to the garbage’s conditions and increase the capacity of energy which is approximately to 20% on the Country and to reduce the impact of environment from the landfill and, the number of landfill and dumpsites, working and attempting to achieve the sustainable development goals. The country has been recording constant interruptions of power supply due to increased energy demand resulting from the development of their Citizen, construction of new industrial, hotel and Office building together with housing. The motivations is to apply garbage as other innocuous source of power or energy, knowing that in the country mainly hydropower and solar, wind, biomass in a small quantity, coal, fuel are vanishing; reduce the impact of environment, global warm and ailments caused by it. The methodologies used to achieve the objectives are thermodynamics, heat transfer expressions and the COCO-OPEN simulation methodology to predate the energy generate from the composition and quantity of MSW. The results illustrates the possibility to enforce Town massive Garbage as source of energy or power, clearly taking in account the track conditions, as the heating value of it is nearly equal to the coal value which has been used to generate energy in many plants around the world. Municipal solid waste should be the future source of electricity to many developing countries if they create the structure to deal with it, treating, separating in different categories, controllin

scholarly journals Heterogeneity and the Energy Consumption of Brazilian Households: A Structural Analysis

2019 ◽  
Vol 39 (1) ◽  
Author(s):  
Cezar Santos ◽  
Mariana Weiss ◽  
Guilherme Zimmermann
Keyword(s):  
Energy Demand ◽  
New Technology ◽  
Electrical Energy ◽  
Fluorescent Light ◽  
Model Parameters ◽  
Household Level ◽  
Residential Sector ◽  
Model Features ◽  
The Impact ◽  
Substantial Heterogeneity

<!--?xml version="1.0" encoding="UTF-8"?--><div id="magicparlabel-2618" class="abstract">This paper develops a structural economic model of the residential sector of an economy. The model features households that are heterogeneous with regard to their income. Given their incomes, households decide how much to spend on a plethora of different goods that use electrical energy as an input. The price of energy is non-linear and depends on one's energy demand. The model parameters are disciplined using rich Brazilian consumption micro data at the household level. The data exhibits substantial heterogeneity of expenditures on electric appliances and energy across the different income deciles, and the model is able to capture these features. We use the calibrated model to perform a variety of counterfactuals. The results suggest that the impact of changes in prices and income varies substantially across income groups. We also study the adoption of a new technology. In particular, the introduction of more energy-efficient fluorescent light bulbs is especially helpful to poorer households, despite the bulbs' higher cost. </div>

scholarly journals Investigating the Impact of Integration the Saudi Code of Energy Conservation with the Solar PV Systems in Residential Buildings

2021 ◽  
Vol 13 (6) ◽  
pp. 3384
Author(s):  
Radwan Almasri ◽  
Abdullah Alardhi ◽  
Saad Dilshad
Keyword(s):  
Energy Conservation ◽  
Energy Demand ◽  
Net Present Value ◽  
Residential Buildings ◽  
Electrical Energy ◽  
Economic Feasibility ◽  
Photovoltaic System ◽  
Solar Pv ◽  
Thermal Insulations ◽  
The Impact

The demand for air conditioning is increasing day by day in the world’s hot and humid climate areas. Energy conservation in buildings can play a vital role in meeting this high cooling demand. This paper attempts to consider the impacts of energy efficiency and renewable energy measures on the energy demand of Saudi Arabia’s residential buildings. The energy analysis and economic feasibility analysis of thermal insulations are performed in this paper by investigating the effect of residential buildings’ thermal insulations on the economic feasibility of grid-connected photovoltaic systems. This was the combined effort of building owners and government, and buildings were examined if a photovoltaic system and thermal insulation were used. The study was conducted in the three climate zones in Saudi Arabia. The results showed that the building base case’s annual electrical energy consumption in Riyadh city was 67,095 kWh, Hail 57,373 kWh, and Abha 26,799 kWh. For the basic case-building in Riyadh, 69% of the total electrical energy was used for cooling and heating. Applying the Saudi Building Code requirement for Riyadh will provide only 18% of the total energy used for cooling and heating. RETScreen 6.1 software was used to design a photovoltaic system; the analysis was done using technical and economic indicators. The annual yield factor for Riyadh, Hail, and Abha was 1649 kWh/kWp/year, 1711 kWh/kWp/year, and 1765 kWh/kWp/year, respectively. The capacity factors for Riyadh, Hail, and Abha were 18.8%, 19.5%, and 20.1%, respectively. The Unified photovoltaic Levelized energy costs were 0.031, 0.030, and 0.029 $/kWh for Riyadh, Hail, and Abha, respectively. Finally, the Net Present Value and greenhouse gas emissions reduction have been estimated.

scholarly journals Identifying Direct Electrical Energy Demand in Wire-Cut EDM

2020 ◽  
Vol 39 (1) ◽  
pp. 171-178
Author(s):  
Anis Fatima ◽  
Amir Iqbal Syed
Keyword(s):  
Energy Consumption ◽  
Machine Tool ◽  
Energy Demand ◽  
Copper Wire ◽  
Electrical Energy ◽  
Working Fluid ◽  
Work Piece ◽  
Main Concern ◽  
Product Cycle ◽  
Machining Processes

Non-traditional machining processes are popular for generating complex features on the work piece. With advances in material engineering, new ways of cutting technologies has been emerged. However, EDM (Electric Discharge Machining) has gained recognition for producing extraordinary surface finished, intricate part geometries with accuracy and its ability to cut through difficult to machined materials. However, like every product cycle, manufacturing processes also require energy to convert raw materials into finished product. In manufacturing operations, energy input gives carbon footprints which have an effect on our environment. It is observed that reducing energy consumption is becoming the main concern of manufacturers because of enforcing environmental laws and due to the economics of the processing. It is argued that world’s 70% of energy consumption is consumed by manufacturing sector. The aim of the work was to identify direct energy demands in wire cut EDM. The variability in energy demand was explored by operating wire cut EDM at no-load and loaded conditions.Stainless steel S304 was used as a work piece. Experiments were performed on three different wire-cut EDM.Molybdenum wire, brass wire and copper wire were used as an electrode wire and distilled water was used as a working fluid. During the experiment, electrical current was measured and the variation of power requirement was evaluated. Power required by different features of EDM was compared with the existing energy models and factors were identified that consume most of the electrical energy. Further, a comparison is made between traditional and non-traditional machining processes. This contribution will help to assess energy efficiency of EDM technology and identify priority areas for improvements. This work is also significant for machine tool designers for optimum utilization of energy,reduced environmental impact and reduced production cost of their machine tool.

scholarly journals The smart transition of Power Transmission Network needed for the sustainable development of Bucharest City

2020 ◽  
Vol 180 ◽  
pp. 04008
Author(s):  
Mircea Scripcariu ◽  
Cristian Gheorghiu ◽  
Ion Tristiu ◽  
Alexandra-Gabriela Dobrica
Keyword(s):  
Energy Demand ◽  
Large City ◽  
Electrical Energy ◽  
Environmental Benefits ◽  
Capital City ◽  
Living Standard ◽  
Transmission Network ◽  
City Development ◽  
Demand Forecast ◽  
The Impact

Large cities around the world continue to grow larger. This is also the case of Bucharest, the capital city of Romania and one of the largest and most densely populated locations in Eastern Europe. In this article authors present an overview of the development of Bucharest as the largest electricity consumer amongst the Romanian municipalities and analyse possible solutions for the refurbishment of the HV (High Voltage) grid. This process needs to help the city development and its transition to a Smart City. At first authors present the strategy of local authorities for improving the living standard and decrease the environmental pollution. The impact of this strategy on the electrical energy demand is further analysed. Possible technologies are presented for substations and electrical lines starting from the current situation of the transmission network. All these can contribute to a decrease of the environmental impact and to an increase in the continuity of the power supply. Technical and economical evaluation of the refurbished grid is further presented along with a sensitivity analysis. The evaluation of the investment is made by taking into consideration the demand forecast. Lines and transformers are sized and chosen with the best available technology. For the economic analysis authors used criteria accepted by funding sources, banks especially, such as NPV and IRR. The sensitivity of the project economics is tested and discussed. As conclusions authors present the environmental benefits of gradually changing the technology used for electricity transmission in a large city such as Bucharest, mainly regarding land occupancy with switchgear and line routes and soil pollution.

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