scholarly journals Innovative Technologies for Producing Foam Concrete Products Using Solar Energy

2018 ◽  
Vol 7 (4.7) ◽  
pp. 36 ◽  
Author(s):  
Lyazat Aruova ◽  
Nabi Dauzhanov ◽  
Batyrkhan Tokmyrza ◽  
Aizhan Utkelbaeva ◽  
Zolaman Shashpan
Keyword(s):  
Solar Energy ◽  
Energy Savings ◽  
Economic Effect ◽  
Winter Period ◽  
Foam Concrete ◽  
Efficient Technology ◽  
Daily Production ◽  
Climate Conditions ◽  
Organic Fuels ◽  
Solar Technology

An energy efficient technology and a method for the production of foam concrete products have been developed. They involve the use of solar energy in the process in order to reduce energy consumption for heat treatment, which allows to produce high-quality products with a low production cost with a daily production cycle.The technical and economic evaluation of the developed solar technology shows that during the hot season up to 95% of the heat energy needed to intensify the hardening of the foam concrete is provided by a renewable energy source. The annual replacement of organic fuels with solar energy, considering the winter period of the year, is up to 65%. The annual economic effect in the oil equivalent of the use of this solar technology in enterprises located in regions with favorable weather and climate conditions, with a productivity of 20 thousand m3/year is up to 85 tons.The use of solar technology to ensure accelerated hardening of foam concrete products makes it possible to make production highly efficient, energy-saving and environmentally friendly. It meets modern requirements for saving organic fuels and reducing harmful emissions into the atmosphere.The energy efficiency of a yearly solar thermal treatment consists of high heat-absorbing and heat-insulating ability of helio-coatings, helio-chambers, and controlling the expenses of the heat source. As a result, energy savings in the winter months are 15-35%, in summer - 70-100%, and the average annual energy savings are in the range from 50 to 75% depending on the class of concrete and the thickness of products.  

scholarly journals Design of an Indirect Dryer with Coupling of Solar Collectors and its Thermal Characterization by Drying the Mint Leaves (Mentha spicate)

2021 ◽  
Vol 10 (1) ◽  
pp. 411
Author(s):  
Margarita Castillo Téllez ◽  
Beatriz Castillo-Téllez ◽  
Alberto Mejía Pérez Gerardo ◽  
Rachid Marzoug ◽  
Diana C. Mex Álvarez
Keyword(s):  
Solar Energy ◽  
Energy Savings ◽  
Thermal Characterization ◽  
Solar Air Heater ◽  
Drying Process ◽  
Efficient Technology ◽  
Water Heaters ◽  
Hot Air ◽  
Evacuated Tubes ◽  
Dry Food

Man has used solar energy to dry perishable products for many years, managing to preserve a wide variety of foods naturally; drying is a method that highly respects the food's properties and nutritional content. The consumption of medicinal and aromatic herbs in Mexico is traditional and widespread. In this work, an analysis of an indirect solar dryer's thermal behavior was carried out with the coupling of solar technologies (water heaters and air collectors and photovoltaic pumping as an aid to the generation of hot air) comparing with electric oven drying in Campeche, Campeche, Mexico. The experimental results showed that the indirect tunnel type dryer that works with evacuated tubes and solar air heater simultaneously is the most efficient technology, with average drying times of 300 min and final humidity of 9.6%. A study of colorimetry, water activity, and drying speed was carried out to control the drying process. It was found that it is possible to use solar energy to dry food as a means of conservation in warm-humid climates, also obtaining significant energy savings and contributing to caring for the environment.

scholarly journals Renewable Energy Technologies for Energy Efficient Buildings: The Case of Kuwait

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4440
Author(s):  
Bader Alshuraiaan
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Solar Energy ◽  
Energy Savings ◽  
Methodological Approach ◽  
Investment Efficiency ◽  
Renewable Energy Technologies ◽  
Energy Technologies ◽  
Energy Efficient Buildings ◽  
Proposed Model

The purpose of this study is to identify the most relevant renewable energy technologies for buildings and to assess the effectiveness of their implementation in the long term for Kuwait. Methods of analogies and comparisons were used to determine the features of energy efficiency based on the technologies under study. The study proposes the methodological approach to assessing the effectiveness of the introduction of renewable energy technologies, determining the direction of increasing the energy efficiency of buildings and the investment efficiency of introducing these technologies. Renewable energy efficiency analysis for buildings in Kuwait confirms that solar energy systems have been the most widely available for widespread use of solar energy over the past three years. An increasing level of energy efficiency with a decrease in the notional cost of increasing energy savings is characteristic of solar collectors with booster reflectors. The proposed model for assessing the level of energy saving provides an opportunity for economic justification of introducing renewable energy technology in buildings.

scholarly journals SOLAR RADIATION PROTECTION SYSTEM WITH SIMULTANEOUS HOT WATER SUPPLY

2020 ◽  
Author(s):  
І. Puhoviy ◽  
М. Makhrov
Keyword(s):  
Solar Energy ◽  
Energy Savings ◽  
Electrical Power ◽  
Warm Season ◽  
Hot Water ◽  
Air Conditioner ◽  
Domestic Water ◽  
Environmental Friendliness ◽  
Additional Advantage ◽  
The Cost

Problems. Windows in the summer let through a large amount of solar energy into the room, which causes an additional cost of cooling the air by conditioning. It is known that the limit of comfort is the temperature of 26 oC. To reduce the temperature, use air conditioners, which are required 0,3...0,5 kW of electrical power for 10 m2 of housing. The study deals with the capture of solar energy by water and its use for domestic water purposes (DHW). The goal of the research. Experimental verification of patented developments and calculations of hot water quantity obtained per day, energy savings and economic indicators. Methods of implementation. Experiments were conducted on the south window of the room, with water pumping by a pump and periodic measurement of air and water temperatures at the outlet of the system by mercury thermometer. The calculations were performed using the methods developed by the authors. The studies were conducted within three days of November. The temperature inside ranged a room from 19 to 23 °C. The system was operated in circulating mode on a water battery tank located below the absorber. Isolation of the absorber from the side of the room was made of a transparent food film. Research results. Water temperature reached 45 °C per 1,5-2 hours. Water consumption is enhanced by the thermosiphon effect when water moves from the bottom up. On a clear day of spring and autumn, you can heat for 50-70 % more water than the average for the average day of months of the warm season. For preparing DHW with 1 m2 of absorber, it is possible to get 45-50 kW∙h of heat for each month from March to September, taking into account cloudiness. The savings from the use of hot water and from reducing the consumption of electricity in the air conditioner are calculated. Conclusions. The payback period of the system, taking into account the cost of the heat for DHW and electricity savings for an electric air conditioner, is approximately 4-5 years. The cost of the system is close to the cost of a home air conditioner, for a premise with a single window oriented south. To the energy-saving factor, an additional advantage is the environmental friendliness of the system compared to the air conditioner.

Microgrid-Based Sustainable E-Bike Charging Station

2021 ◽  
pp. 144-167
Author(s):  
Ghanishtha Bhatti ◽  
Raja Singh R.
Keyword(s):  
Energy Savings ◽  
Efficient Technology ◽  
Dc Microgrid ◽  
Power Efficient ◽  
Charging Infrastructure ◽  
The Public ◽  
Charging Station ◽  
Long Time ◽  
Infrastructure Maintenance ◽  
Charging Stations

This chapter focuses on developing a sustainable architecture for public electric motorbike charging stations. Electric motorbikes or electric bicycles (both referred to as e-bikes) are compact electric vehicles which are primarily battery-powered and driven solely by electric motors. This work conceptualizes a microgrid architecture which utilizes the integration of distributed generation energy resources providing the charging station nodes with sustainable power and increased fault tolerance. The charging stations proposed in the study increase the long-time energy savings of the infrastructure maintenance authorities while also reducing reliance on the public grid during peak hours. The photovoltaic-based DC microgrid is integrated with e-bike charging infrastructure, moving towards a future of eco-friendly and power-efficient technology.

scholarly journals Influence of Climate Conditions on the Temporal Development of Wheat Yields in a Long-Term Experiment in an Area with Pleistocene Loess

Climate ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 100 ◽  
Author(s):  
Kurt Heil ◽  
Anna Lehner ◽  
Urs Schmidhalter
Keyword(s):  
Field Experiments ◽  
Wheat Yield ◽  
Climatic Conditions ◽  
Climate Indices ◽  
Winter Period ◽  
Climate Conditions ◽  
Spring Frost ◽  
Available Water ◽  
Late Spring Frost

Field experiments were conducted to test different agronomic practices, such as soil cultivation, fertilization, and pest and weed management, in highly controlled plot cultivation. The inter-annual yields and the interpretation of such experiments is highly affected by the variability of climatic conditions and fertilization level. We examined the effect of different climate indices, such as winterkill, late spring frost, early autumn frost, different drought parameters, precipitation-free periods, and heat-related stress, on winter wheat yield. This experiment was conducted in an agricultural area with highly fertile conditions, characterized by a high available water capacity and considerable C and N contents in lower soil depths. Residuals were calculated from long-term yield trends with a validated method (time series autoregressive integrated moving average ARIMA) and these served as base values for the detection of climate-induced, short-term, and inter-annual variations. In a subsequent step, the real yield values were used for their derivations from climate factors. Residuals and real yields were correlated with climate variables in multiple regression of quantitative analyses of the yield sensitivity. The inter-annual variation of yields varied considerably within the observation period. However, the variation was less an effect of the climatic conditions during the main growing time periods, being more of an effect of the prevailing climate conditions in the winter period as well as of the transition periods from winter to the warmer season and vice versa. The high storage capacity of plant available water exerted a remarkable dampening effect on drought-induced effects during the main vegetation periods. Increasing fertilization led to increased susceptibility to drought stress. The results indicate a changed picture of the yield development in these fertile locations.

scholarly journals A Review of Solar Radiation Models—Part I

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
A. K. Katiyar ◽  
C. K. Pandey
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Energy Demand ◽  
Socioeconomic Development ◽  
Global Solar Radiation ◽  
Point Of View ◽  
Climate Conditions ◽  
Energy Devices ◽  
The World

Energy is considered as a key source for the future and plays a pivotal role in its socioeconomic development by raising the standard of living and the quality of life, not only for India but also for the world. In view of the scarce fossil fuel reserves, solar energy is one of the important sources of renewable energy used in India because of the suitable climate conditions. It receives about 5485.17 Wh/m2day of solar insolation with an annual total of about 19, 74, 661.2 Wh/m2. Except for the monsoon months, solar radiation incidence is very encouraging, from the application point of view. For the efficient functioning and better performance of solar energy device, the information of solar radiation and its components at particular location is very essential for designing the solar energy devices. Therefore, over the years, several empirical correlations have been developed in order to estimate the more appropriate solar radiation in India as well as around the world. Here we present a review of different solar radiation models which predict global solar radiation and discussed the long-term plan to meet future energy demand with renewable energy due to economy growth.

scholarly journals Impact of Toronto’s Avenues & Mid-rise Building Guidelines on Solar Energy Generation Potential

2021 ◽  
Author(s):  
Jelena Garic
Keyword(s):  
Solar Energy ◽  
Fossil Fuels ◽  
Energy Savings ◽  
Local Level ◽  
Performance Standards ◽  
Energy Generation ◽  
Building Performance ◽  
Built Form ◽  
Solar Access ◽  
The Impact

As cities grow, strategies for how and where to accommodate growth are increasingly important. Similarly, renewable energy is gaining importance as a means of reducing our dependency on fossil fuels and other non-renewables, reducing greenhouse gas emissions and pollution, and creating energy resiliency at a local level. The purpose of this Major Research Project is to determine the impact the Mid-Rise Building Performance Standards, from the City of Toronto’s 2010 Avenues and Mid-Rise Building Study, have on solar access and to quantify the potential of energy generation using solar photovoltaic systems along the Avenues in Toronto. What impact do the Performance Standards have on solar access to mid-rise buildings along the Avenues? The research concludes that low-podium built form provides the most benefit for the study area – Eglinton Avenue West, at Bathurst Street: the porous street-wall built-form, as outlined in the Mid-Rise Building Performance Standards, provides the highest solar energy generation and energy savings potential.

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