scholarly journals Estimation of surplus energy in off-grid solar home systems

2021 ◽  
Vol 6 ◽  
pp. 25
Author(s):  
Satyam Bhatti ◽  
Arthur Williams
Keyword(s):  
Solar Energy ◽  
Energy Demand ◽  
Energy Return On Investment ◽  
Underdeveloped Countries ◽  
Surplus Energy ◽  
Available Energy ◽  
The People ◽  
Working Principle ◽  
Hourly Basis ◽  
Home Systems

A recent survey shows that a large percentage of people living in underdeveloped countries do not have access to electricity and are isolated from the rest of the world. Solar energy can help meet the energy demand; however, it has an intermittent nature and relatively high installation cost. The improvement in off-grid Solar Home Systems (SHS) helped many people get access to electricity. However, systems are sized to meet demand on cloudy days, which results in significant wastage of available energy on sunny days, reducing the energy return on investment. This research paper discusses the load requirement of the people living in rural locations. It uses data collected over the last year by collaborating organisations, providing detailed load and solar charging data for off-grid households in Odisha, India. This dataset is analysed to understand the working principle of the installed SHS and the typical daily load profile. Next, the solar data is compared with solar data from online accessible software on an hourly basis and on a 5-minute scale to evaluate the surplus energy. The data shows a significant surplus of solar energy for most of the year that could be used for other low-powered devices. Various methods are discussed to detect surplus energy available during the daytime based on the provided solar data.

scholarly journals Renewable Energy Substitution in Lieu of Fossil Fuel based Energy for India

2019 ◽  
Vol 8 (10) ◽  
pp. 267-273
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Solar Energy ◽  
Smart Grid ◽  
Energy Demand ◽  
Energy Requirement ◽  
Energy Return On Investment ◽  
Demand Prediction ◽  
Stage Of Development ◽  
Energy Substitution

Rapid globalization and industrialization is witnessed across the globe. This has led to a rapid increase in energy demand. In India, it is found that energy consumption is growing exponentially. A sustainable energy model that helps in optimizing the energy consumption is the need of the hour. The model should help policymakers to put proactive plans in place. A two-step process has been carried out. A demand prediction model is proposed to forecast the fossil based energy demand for India upto 2040-41. 92 econometric models have been were developed and the best fit was found. The requirement was found to be coal and lignite = 32203.42 pJ oil = 20396.92 PJ, natural gas = 3460.77 pJ and electricity = 9887.71 pJ. The total energy requirement in 2040-41 will be 65948 pJ in 2040-41. Using constraints such as energy return on investment, acceptability, reliability and CO2 emissions a multi-objective optimization model that maximizes efficiency and minimizes cost is developed. Renewable energy substitution scenarios are developed. Solar energy is expected to dominate and polices have to designed to ensure that the naturally available solar energy is being utilized to a larger extent. Smart grid technology is at its nascent stage of development in India. Research and development has to be done to enhance the use of smart grid so that decentralized energy generation from renewable energy can be increased.

Development of Pure Sine Wave Inversion System with Inbuilt Charging and Display Mechanisms

2018 ◽  
Vol 3 (2) ◽  
pp. 1-6
Author(s):  
Raji A. Abimbola
Keyword(s):  
Energy Demand ◽  
Noise Pollution ◽  
Sine Wave ◽  
Maintenance Cost ◽  
Air Conditioner ◽  
Health It ◽  
Power Generator ◽  
Available Energy ◽  
Wave Inversion ◽  
Running Cost

In recent years, Nigeria’s power generation output from all the available energy sources such as coal, natural gas, and water, is far from the expected number required to meet the energy demand of her teeming populace. This culminates in long hours of power outages frequently experienced in many parts of the country. However, there appears to be no end in sight to the problem. Alternatively, few citizens who can afford generator have wittingly resulted to the use of this device to supply power. Generator set has unavoidable disadvantages of high maintenance or running cost, noise pollution, and release of dangerous gases that pose danger to human lives. Evidently, that solution is risky and inadequate. Power inverter is an alternative and better means of generating electricity with little or no maintenance cost, environment or eco- friendly and poses no risk to human health. It is in that connection that we develop in this work 2KVA sine wave inversion system which produces sinusoidal A.C. signal required in homes for lightning and powering electronic gadgets like television, radio, refrigerator, Air conditioner etc. It is an improvement over square wave and modified sine wave inversion systems that generate digital approximations of A.C. signal. An interesting but new addition is the use of LCD display, interfaced with PIC16F688 microcontroller for showing the design specifications of the inverter.

scholarly journals Optimization of Costs and Self-Sufficiency for Roof Integrated Photovoltaic Technologies on Residential Buildings

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4018
Author(s):  
Guglielmina Mutani ◽  
Valeria Todeschi
Keyword(s):  
Solar Energy ◽  
Energy Security ◽  
Energy Demand ◽  
Residential Buildings ◽  
Maximum Level ◽  
Economic Incentives ◽  
Economic Benefits ◽  
The South ◽  
Self Sufficiency ◽  
Photovoltaic Technologies

It is common practice, in the production of photovoltaic energy to only use the south-exposed roof surface of a building, in order to achieve the maximum production of solar energy while lowering the costs of the energy and the solar technologies. However, using the south-exposed surface of a roof only allows a small quota of the energy demand to be covered. Roof surfaces oriented in other directions could also be used to better cover the energy load profile. The aim of this work is to investigate the benefits, in terms of costs, self-sufficiency and self-consumption, of roof integrated photovoltaic technologies on residential buildings with different orientations. A cost-optimal analysis has been carried out taking into account the economic incentives for a collective self-consumer configuration. It has emerged, from this analysis, that the better the orientation is, the higher the energy security and the lower the energy costs and those for the installation of photovoltaic technologies. In general, the use of south-facing and north-facing roof surfaces for solar energy production has both economic and energy benefits. The self-sufficiency index can on average be increased by 8.5% through the use of photovoltaic installations in two directions on gable roofs, and the maximum level that can be achieved was on average 41.8, 41.5 and 35.7% for small, medium and large condominiums, respectively. Therefore, it could be convenient to exploit all the potential orientations of photovoltaic panels in cities to improve energy security and to provide significant economic benefits for the residential users.

Development of an Innovative Code for the Design of Different Parabolic Trough Solar Fields

2009 ◽  
Author(s):  
Ennio Macchi ◽  
Giampaolo Manzolini ◽  
Paolo Silva
Keyword(s):  
Solar Energy ◽  
Energy Demand ◽  
Working Fluid ◽  
Fluid Temperature ◽  
Parabolic Trough ◽  
High Solar Radiation ◽  
Power Block ◽  
The Usa ◽  
Solar Field ◽  
Steam Cycle

The role of renewable energies and in particular solar energy could be fundamental in future scenarios of worldwide increase of energy demand: thermodynamic solar energy can play an important role in country with high solar radiation. This paper discusses the development and testing of an innovative code for the prediction of thermodynamic performances at nominal conditions and the estimation of costs of the whole plant, for different parabolic trough solar fields. The code allows a preliminary design of the solar field lay-out, the sizing of the main components of the plant and the optimization of the steam cycle. The code, named PATTO (PArabolic Trough Thermodynamic Optimization), allows to separately calculate the thermal efficiency of (i) parabolic trough systems in commerce as well as (ii) combination of components of various commercial systems, in order to exploit different technology solutions: combination of mirrors, receivers and supports. Using the selected parabolic troughs, the plant configuration is then completed by connecting pipes, heat exchangers, the steam cycle, and storage tanks. The code is also flexible in terms of working fluid, temperature and pressure range. Regarding the power block, a conventional steam cycle with super-heater and re-heater sections and up to seven regenerative bleedings is adopted. It is possible to use also simpler configuration as without re-heater or with less regenerative bleedings. Moreover, thanks to simple or sophisticated economic correlations depending on available data, the code calculates the overall investment cost for the considered solar field and the power block. The code performs steady state analysis at nominal conditions, while future developments are planned regarding part load analysis and transient simulations. The model is tested towards real applications and reference values found in literature; in particular, focusing on SEGS VI plant in the USA. Detailed results showing code potentiality, are presented in terms of solar field and power block energy balances, plant auxiliaries, piping and economic analysis.

scholarly journals A SUSTAINABLE GROWTH OF CLEAN ENERGY IN INDIA: A TARGET 2022

2021 ◽  
Vol 9 (2) ◽  
pp. 1069-1076
Author(s):  
Ashish Singhal, Et. al.
Keyword(s):  
Solar Energy ◽  
State Government ◽  
Prime Minister ◽  
Clean Energy ◽  
Sustainable Growth ◽  
Energy Demands ◽  
The People ◽  
The Government ◽  
Set Up ◽  
Energy Aspects

The extenuation of non-conventional global energy demands and changing environments is one of the most important ingredients in recent days. A case is about the study of sun energy acquired as clean energy by the government of India (GOI). GOI announced the various schemes for solar energy (SE) in the last decades because of the tremendous growth of solar energy aspects for the non-conventional sources with the support of central and state government. This article covered the progress of solar energy in India with major achievements. In this review article, the authors are trying to show the targets of the government of India (GOI) by 2022 and his vintage battle to set up a plant of solar or clean energy in India. This paper also emphasizes the different policies of GOI to schooling the people for creating the jobs in different projects like “Make in India”. This paper projected the work of the dynamic Prime Minister of India Mr. Narendra Modi and his bravura performance to increase the targets 100 GW solar energy by 2022.

scholarly journals Effects of solar energy use on rural community: a study of Boyarjapha village in Paikgachha upazila

2020 ◽  
Author(s):  
Sajadul Alam Saimon ◽  
Rakibul Ahasan
Keyword(s):  
Solar Energy ◽  
Renewable Resources ◽  
Energy Demand ◽  
Energy Use ◽  
Solar Power ◽  
Working Hours ◽  
Remote Areas ◽  
Rural And Remote Areas ◽  
Solar Electricity ◽  
Day By Day

Renewable energy is of great importance for today’s world which is generally produced from natural sources. Countries like Bangladesh has to use this energy to meet their energy demand. Day by day the demand of electricity is increasing in stormy pace but our resource is limited. So using renewable resources i.e. solar power to meet the demand of electricity is highly necessary especially rural and remote areas. This paper examined the nature and extent of solar energy in Boyarjapha village of Paikgachha Upazila of Khulna district to analyse the effects of solar panel in their daily life. Many positive impacts of solar power were found out such as better quality lighting, education, entertainment, communications, business, increasing working hours, women empowerment, increasing awareness etc. There are a few bad effects of solar energy too. But Government intervention is a must to ensure better quality results in coming future. Similarly, government has to take serious steps to advertise solar electricity in remote areas of Bangladesh

scholarly journals The building performance gap: Are modellers literate?

2017 ◽  
Vol 38 (3) ◽  
pp. 351-375 ◽  
Author(s):  
Salah Imam ◽  
David A Coley ◽  
Ian Walker
Keyword(s):  
Physics Education ◽  
Energy Demand ◽  
Building Performance ◽  
Performance Gap ◽  
The People ◽  
Great Utility ◽  
Input Variables ◽  
Definition Of ◽  
Building Physics ◽  
First Time

One of the most discussed issues in the design community is the performance gap. In this research, we investigate for the first time whether part of the gap might be caused by the modelling literacy of design teams. A total of 108 building modellers were asked to comment on the importance of obtaining and using accurate values for 21 common modelling input variables, from U-values to occupancy schedules when using dynamic simulation to estimate annual energy demand. The questioning was based on a real building for which high-resolution energy, occupancy and temperature data were recorded. A sensitivity analysis was then conducted using a model of the building (based on the measured data) by perturbing one parameter in each simulation. The effect of each perturbation on the annual energy consumption given by the model was found and a ranked list generated. The order of this list was then compared to that given by the modellers for the same changes in the parameters. A correlation analysis indicated little correlation between which variables were thought to be important by the modellers and which proved to be objectively important. k-means cluster analysis identified subgroups of modellers and showed that 25% of the people tested were making judgements that appeared worse than a person responding at random. Follow-up checks showed that higher level qualifications, or having many years of experience in modelling, did not improve the accuracy of people’s predictions. In addition, there was no correlation between modellers, with many ranking some parameters as important that others thought irrelevant. Using a three-part definition of literacy, it is concluded that this sample of modellers, and by implication the population of building modellers, cannot be considered modelling literate. This indicates a new cause of the performance gap. The results suggest a need and an opportunity for both industry and universities to increase their efforts with respect to building physics education, and if this is done, a part of the performance gap could be rapidly closed. Practical application: In any commercial simulation, the modeller will have to decide which parameters must be included and which might be ignored due to lack of time and/or data, and how much any approximations might perturb the results. In this paper, the judgment of 108 modellers was compared against each other. The results show that the internal mental models of thermal modellers disagree with one another, and disagree with the results of a validated thermal model. The lessons learnt will be of great utility to modellers, and those educating the next generation of modellers.

SunPower: A Path Toward Strategic Development

2021 ◽  
Vol 3 (2) ◽  
pp. 77-86
Author(s):  
Aarti Singh
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Mergers And Acquisitions ◽  
Energy Demand ◽  
Energy Sector ◽  
Growth Path ◽  
Strategic Choices ◽  
Strategic Development ◽  
Solar Power Generation ◽  
And Storage

SunPower Corporation is an American organization working in the solar energy sector specialized in power generation and solar energy storage. This case highlights the strategic growth path of SunPower corporation, which originated as an outcome of effective solar cells production. This case also discussed how the energy sector considers solar energy the vital energy source, and solar energy organizations grow to capture the energy demand. The case also highlights the various consolidations of SunPower in terms of different mergers and acquisitions as essential strategies to succeed. The case also discusses the competitors’ strategy of the top five solar power generation and storage firms, which give a clear view of how different solar firms are building their space in the solar energy sector. With competitors’ discussion, this helps to understand the challenge faced by SunPower to beat the competition among the other solar firms. In the end, the case focused on the ongoing and future strategic choices of SunPower as SunPower Corporation.

Numerical and experimental analysis of parallel-pass forced convection solar air heating wall with different plenum and absorber configurations

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ataollah Khanlari ◽  
Adnan Sözen ◽  
Faraz Afshari ◽  
Azim Doğuş Tuncer ◽  
Ümit Ağbulut ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Demand ◽  
Large Scale ◽  
Outlet Temperature ◽  
Heating Wall ◽  
Average Deviation ◽  
Content Type ◽  
Energy Applications ◽  
Air Heating ◽  
Simulation Results

Purpose Over the recent years, solar energy has received outstanding attention from researchers. Solar energy applications and related large-scale projects are increasing to meet growing global energy demand as an economical, non-polluting and renewable energy source. The purpose of this study is investigating different plenum and absorber configurations of solar air heating wall (SAHW) experimentally and numerically. Design/methodology/approach In this study, various configurations of SAHW have been numerically simulated to determine the most effective design. According to the simulation results, two SAHWs with various plenum thicknesses have been fabricated and tested at different conditions. Findings Numerical simulation results indicated that parallel-flow SAHWs exhibited better performance in comparison with other placements of absorber plate. Regarding to the experimentally attained results, the highest thermal efficiency was reached to 80.51%. Also, the average deviation between experimentally and numerically obtained outlet temperature is 5.5%. Originality/value Considering the obtained results in the present study, designed SAHW has admissible efficiency to be used in various industrial and residential applications such as; air preheating, space heating and drying.

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