Thermal Modeling of a Rooftop Photovoltaic/Thermal System With Earth Air Heat Exchanger for Combined Power and Space Heating

2018 ◽  
Vol 140 (3) ◽  
Author(s):  
Sanjeev Jakhar ◽  
Manoj S. Soni ◽  
Robert F. Boehm
Keyword(s):  
Renewable Energy ◽  
Heat Exchanger ◽  
Las Vegas ◽  
Renewable Energy Sources ◽  
Winter Season ◽  
Climatic Conditions ◽  
Heating Capacity ◽  
Photovoltaic Thermal System ◽  
Maximum Cell ◽  
Useful Heat

Earth air heat exchanger (EAHE) systems are inefficient to provide thermal comfort in winter season for semi-arid regions. The performance of such systems could be improved by coupling them with other renewable energy sources. One of the renewable energy technology is rooftop photovoltaic/thermal (PV/T) air collectors which could utilize the incident solar insolation to obtain both electricity as well as useful heat. In the current paper, the thermal performance of an EAHE coupled with a PV/T system has been numerically investigated for climatic conditions of Pilani, Ajmer (India), and Las Vegas (U.S.). For the comparative analysis, a thermodynamic model has been developed and compared with experimental data available in the literature which seems to be in good comparison with the results. Further, a parametric analysis has been carried out for assessing the effect of different operating parameters. Results showed that for the winter season, the maximum cell temperature without any cooling goes up to 54.3 °C, 54.5 °C, and 44.4 °C for Pilani, Ajmer, and Las Vegas, respectively, while with cooling it drops to 43.4 °C, 44.2 °C, and 35.6 °C, respectively, for 0.053 kg/s flow rate. The heating capacity of the EAHE was observed to be improved with PV/T air collector by 23.47 Wh–298.74 Wh, 71.18 Wh–315.93 Wh, and 41.43 Wh–270.75 Wh for the Pilani, Ajmer, and Las Vegas, respectively.

scholarly journals Optimal Energy Management of a Grid-Tied Solar PV-Battery Microgrid: A Reinforcement Learning Approach

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2700
Author(s):  
Grace Muriithi ◽  
Sunetra Chowdhury
Keyword(s):  
Renewable Energy ◽  
Reinforcement Learning ◽  
Energy Management ◽  
Renewable Energy Sources ◽  
Critical Role ◽  
Winter Season ◽  
Learning Approach ◽  
Solar Pv ◽  
Optimal Energy ◽  
Optimal Energy Management

In the near future, microgrids will become more prevalent as they play a critical role in integrating distributed renewable energy resources into the main grid. Nevertheless, renewable energy sources, such as solar and wind energy can be extremely volatile as they are weather dependent. These resources coupled with demand can lead to random variations on both the generation and load sides, thus complicating optimal energy management. In this article, a reinforcement learning approach has been proposed to deal with this non-stationary scenario, in which the energy management system (EMS) is modelled as a Markov decision process (MDP). A novel modification of the control problem has been presented that improves the use of energy stored in the battery such that the dynamic demand is not subjected to future high grid tariffs. A comprehensive reward function has also been developed which decreases infeasible action explorations thus improving the performance of the data-driven technique. A Q-learning algorithm is then proposed to minimize the operational cost of the microgrid under unknown future information. To assess the performance of the proposed EMS, a comparison study between a trading EMS model and a non-trading case is performed using a typical commercial load curve and PV profile over a 24-h horizon. Numerical simulation results indicate that the agent learns to select an optimized energy schedule that minimizes energy cost (cost of power purchased from the utility and battery wear cost) in all the studied cases. However, comparing the non-trading EMS to the trading EMS model operational costs, the latter one was found to decrease costs by 4.033% in summer season and 2.199% in winter season.

scholarly journals EVALUATION OF COMBINED PRODUCTION OF HEAT AND ELECTRICITY ON THE COGENERATION UNIT

2021 ◽  
Vol 2021 (6) ◽  
pp. 5312-5316
Author(s):  
MIROSLAV RIMAR ◽  
◽  
MARCEL FEDA ◽  
ANDRII KULIKOV ◽  
MILAN ABRAHAM ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Natural Environment ◽  
Energy Production ◽  
Renewable Energy Sources ◽  
Winter Season ◽  
Main Idea ◽  
Heating System ◽  
Energy Sources ◽  
Central Heating

The purpose of currently contribution is to analyse and compare effectivity of cogeneration unit in each summer and winter season. The main idea of combined heat and energy production is to reduce usage of primary fuels and with that connected reduction of pollutions due to the integration of renewable energy sources and with regard to the natural environment. Presented contribution is dedicated on issue on the operation of a cogeneration unit integrated in central heating system.

Calculation of Receipt of Renewable Energy Resources and Operation Modes of Power Plants

2021 ◽  
pp. 1777-1795
Author(s):  
Baba Dzhabrailovich Babaev ◽  
Vladimir Panchenko ◽  
Valeriy Vladimirovich Kharchenko
Keyword(s):  
Renewable Energy ◽  
Power Plants ◽  
Optimization Problem ◽  
Renewable Energy Sources ◽  
Operating Mode ◽  
Climatic Conditions ◽  
Energy Resources ◽  
Optimal Configuration ◽  
Renewable Energy Resources ◽  
Energy Complex

The main objective of the work is to develop principles for the formation of the optimal composition of the energy complex from all the given power plants based on renewable energy sources for an autonomous consumer, taking into account the variable energy loads of the consumer, changing climatic conditions and the possibility of using local fuel and energy resources. As a result of solving this optimization problem, in addition to the optimal configuration of the power complex, it is also necessary to solve the problem of optimizing the joint operation of different types of power plants from the selected optimal configuration, that is, it is necessary to determine the optimal modes of operation of power plants and the optimal share of their participation in providing consumers at every moment in time. A numerical method for analyzing and optimizing the parameters and operating mode of the energy complex with the most accurate consideration of the schedule of changes in consumer load and software that automates the solution of this optimization problem are also presented.

Ecological houses of Southern Kazakhstan using renewable energy sources

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ardasher Namazbay Yussupov ◽  
Akmaral Ardasherovna Yussupova
Keyword(s):  
Renewable Energy ◽  
Rural Areas ◽  
Building Materials ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Local Population ◽  
Climatic Conditions ◽  
Energy Sources ◽  
Content Type ◽  
Wide Range

PurposeThe purpose of this article discusses the design of underground eco-houses using a dome structure of light construction while taking into account the historical experience of the development of the local population. This article considered the traditions of folk architecture and modern sophistication in the creation of energy-efficient eco-houses in foreign countries in the context of architecture and construction of affordable residential homes for the local population.Design/methodology/approachThe research presented in this paper was motivated by the need for developing agro-tourism facilities in hard-to-reach areas of the Silk Road in Southern Kazakhstan causes the construction of eco-houses built using local construction materials. Since ancient times in Southern Kazakhstan and during seasonal migrations in yurts of light construction, people have lived in mud-brick houses deep in the ground. Along with architectural and artistic solutions in building construction, great importance was attached to saving material resources, labour costs and achieving heat stability of residential buildings.FindingsIn the architectural and planning solution of the eco¬-house, progressive directions of construction of agrotechnical structures using renewable energy sources are adopted. Particular importance was given to the choice of the construction site on an elevated area nearby historical monuments and a favourable season for the construction of eco-houses with considering the natural and climatic characteristics of rural areas of Southern Kazakhstan.Research limitations/implicationsThis paper discussed the issues of insulation, ventilation and improving the eco-house microclimate comfort using local building materials. Improving the architectural and artistic expressiveness of the eco-house in terms of the tradition of folk architecture was also explicitly discussed in this paper.Practical implicationsTables with the justification of expediency of construction of economical eco-houses in natural and climatic conditions of Kazakhstan and Central Asia are provided. The results help to improve the energy efficiency of eco-houses in Kazakhstan by using renewable energy sources.Social implicationsSocial benefits are associated with the use of local raw materials. Eco-houses built from traditional building materials can become accessible to a wide range of people and stimulate the development of small businesses. This may be associated with the construction of eco-houses to serve visiting tourists in remote picturesque oases, as well as the manufacture of dome structures, felt products and the preparation of reed panels and so on.Originality/valueThe thermotechnical characteristics of the region's ground energy are given, which can significantly save the cost of heating the eco-house. Solutions for optimal insolation, ventilation of the eco-house are provided, taking into account the natural and climatic conditions of Southern Kazakhstan.

scholarly journals Environmental substantiation for the use of alternative energy sources

2021 ◽  
Vol 244 ◽  
pp. 01007
Author(s):  
Svetlana Ovchinnikova ◽  
Aleksandr Borovkov ◽  
Galina Kukinova ◽  
Nina Markina
Keyword(s):  
Renewable Energy ◽  
Intelligent Systems ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Predictive Analytics ◽  
Renewable Energy Sources ◽  
Climatic Conditions ◽  
Household Waste ◽  
Energy Sources ◽  
Alternative Energy Sources

An overview of the substantiation of the relevance of the transition to mass ecological housing construction, which is determined by an acute shortage of housing and a high increase in the cost of electricity, is given. The development of an ecological substantiation of an energy-independent house using the example of a one-story house, taking into account natural and climatic conditions, is presented. The characteristics of the work of all utilized engineering systems are considered. It has been established that the housing and utilities sector, being one of the main sources of air and groundwater pollution, creates a large amount of household waste, which has a detrimental effect on the environmental situation. Renewable energy sources have an inexhaustible supply, since they are obtained from natural processes that will not be exhausted in the foreseeable future. Thus, the prospects for renewable energy sources are in considering them to replace fossil fuels. Economic efficiency is defined, which implies that the energy source is economical both in relation to the net cost of production and in relation to supply. The development of renewable energy sources will play an important role in the transformation and digitalization of the Russian power industry. Technologies of energy storage, intelligent systems for forecasting production and demand, predictive analytics of equipment condition, consumption management and many others will be developed.

scholarly journals Methodology of complex evaluation of energy transportation systems from remote renewable resources

2021 ◽  
Vol 289 ◽  
pp. 05003
Author(s):  
Oleg Baldynov ◽  
Sergei Popov
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Renewable Resources ◽  
Renewable Energy Sources ◽  
Unit Cost ◽  
Primary Energy ◽  
Transportation Systems ◽  
Climatic Conditions ◽  
The Arctic ◽  
Energy Transportation

In the last two decades, the unit cost of so-called “new” renewable energy sources has shown a significant decline: photovoltaic panels and wind turbine generators, which is the main reason for the increase in the share of RES in primary energy consumption. However, regions with suitable natural and climatic conditions for the development of renewable energy aren’t in a generally densely populated and located at a significant geographical distance from the centers of energy consumption (the level of solar insolation in the Gobi and Atacama deserts, wind speed on the coasts of the Arctic Ocean and the Pacific Oceans, etc.). Anticipating a significant development of the need for the use of renewable energy, it is necessary to perform preliminarily a complex of evaluation of energy transportation systems from remote renewable resources.

scholarly journals Marketing of renewable energy sources

2020 ◽  
Vol 175 ◽  
pp. 14006
Author(s):  
Yaroslav Lavrinenko ◽  
Victoria Tinyakova ◽  
Larisa Shishkina ◽  
Ruben Partevian
Keyword(s):  
Renewable Energy ◽  
Alternative Energy ◽  
Raw Materials ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Energy Sources ◽  
Utilization Rate ◽  
Installed Capacity

The article discusses the importance of marketing in the market of renewable energy sources. Alternative energy and its development significantly depend on the country and the climatic conditions of a particular area. In Russia, alternative energy, its development, lags behind world leaders. There are several reasons for this. The first reason is the large reserves of fuel and energy raw materials and their low cost. The second reason is the low utilization rate of the installed capacity of alternative energy. The third reason is that the weather conditions in Russia are nonhomogeneous and not very suitable for the development of alternative energy. A promising direction for the development of alternative energy is small alternative energy. Marketing is built on effective market segmentation, increasing end-user awareness and customer education efforts. The article also provides recommendations for improving the effectiveness of marketing, its special features, taking into account altruism, paternalism and moral satisfaction ofcustomers.

scholarly journals THE ANALYSIS OF THE USAGE AND PERSPECTIVES OF RENEWABLE ENERGY SOURCES IN LITHUANIA / ATSINAUJINANČIŲ ŠALTINIŲ PANAUDOJIMO IR PERSPEKTYVŲ LIETUVOJE ANALIZĖ

2011 ◽  
Vol 3 (1) ◽  
pp. 73-77
Author(s):  
Dominykas Vasarevičius
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Renewable Energy Sources ◽  
Climatic Conditions ◽  
Energy Utilization ◽  
Energy Sources ◽  
Solar Thermal Energy ◽  
Policy Model ◽  
Advantages And Disadvantages ◽  
Private Households

The paper presents the current situation with the renewable energy sources in Lithuania. An overview of legislation promoting the production and usage of renewable energy in Lithuania is presented. Renewable energy production methods suitable for Lithuanian conditions, their advantages and disadvantages are discussed. It is shown that there is no any promotion from the state for usage of solar energy in private households. The potential of solar energy usage is determined. In order to show the effectiveness of solar thermal energy utilization under similar climatic conditions presented the example of promotion policy model and its results in Poland.

scholarly journals Hybrid System Analysis using Solar and Wind Power

2019 ◽  
Vol 8 (4S2) ◽  
pp. 358-361
Keyword(s):  
Renewable Energy ◽  
Wind Power ◽  
Hybrid System ◽  
System Analysis ◽  
Renewable Energy Sources ◽  
Climatic Conditions ◽  
Energy Sources ◽  
Climate Conditions ◽  
Photo Voltaic ◽  
The One

Combination of Photo voltaic and wind power is the one of the best solution for providing cleaning and nonpolluting energy from two of the most abundant renewable energy sources. A few areas have a wealth of light energy while others have a plenitude of wind. Having a mix Hybrid system enables you to exploit the predominant climate conditions to amplify vitality generation. The electrical vitality (DC control) created utilizing Solar panel can be put away in batteries or can be utilized for providing DC stacks or can be utilized for inverter to encourage AC loads. Solar Energy is accessible just amid the day time while wind vitality is accessible for the duration of the day relying on the climatic conditions. Wind and sun powered vitality are correlative to one another, which makes the framework to create power nearly consistentlys.

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