Green energies and the environment (original) (raw)
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NEW ENERGY SOURCES AND ENERGY EFFICIENCY TO PREVENT CATASTROPHIC GLOBAL CLIMATE CHANGE
Regardless of the various solutions that may be adopted to eliminate or mitigate the causes of global warming, the most important is undoubtedly the adoption of measures to contribute to the elimination or reduction of the consumption of fossil fuels in energy production as well as for their more efficient use in transport, industry, agriculture and urban areas (residential and commercial), given the use and production of energy account for 57% of greenhouse gases emitted by human activity. In this sense, the implementation of a world sustainable energy system is essential.
Refrigerants and their impact in the environment. Use of the solar energy as the source of energy
Energy Procedia, 2011
From household refrigerator to cooling chambers and passing by air conditioners of all types, refrigerants are widely used in both industrial and domestic equipments. These fluids, which are henceforth being banned due in particular to their environmental toxicity, are expected to be replaced. Replacing them is a difficult task considering that the only solutions currently available are the so-called "natural" refrigerants, such as ammonia, hydrocarbons and CO2. The disadvantages of these products are mainly toxicity (NH3), flammability (HC) and high pressures (CO2). However, with minimal skills and compliance with safety rules, they do not eventually prove to be more dangerous than other fluids. Our endeavour in this project is intended as a contribution to the protection of our environment. The motive being to produce cold for freezing foodstuffs, preservation of pharmaceuticals and space cooling. We aim in particular at the control of clean (white) rooms. Considering the climate situation in our country, this cold production will be supported by the use of solar energy as a power source, in order to ensure the autonomy of these areas in arid and semi arid regions. An alternative that seems promised to a bright future.
Boosting renewable energy in heating and cooling. Fact sheet for six case studies
Chassein, Edith; Hummel, Marcus; Kranzl, Lukas; Maurer, Christiane, Cappelletti, Floriane; Münster, Marie; Ben Amer-Allam, Sara et al. (2017): Boosting renewable energy in heating and cooling. Fact sheet for six case studies. progRESsHEAT fact sheet of best practices and success factors and recommendations on actions and policies based on empirical results. With Contributions from: Michael Rex, Christiane Egger, Megan Lauringer, Anja Gahleitner, Jaroslav Klusák, Hugo Santos, Thomas Wiene, Martin Dam Wied, Camelia Rata and Leea Catincescu. Client: European Commission (Horizon2020). This report sums up the results of the analysis of barriers and drivers to the deployment of heating and cooling solutions based on renewable energy sources (RES), carried out in the framework of the progRESsHEAT project (Work Package 3). Based on the review of existing policies (task 3.1, Holländer et al. 2016) and the empirical analysis of barriers and drivers (task 3.2, Chassein et al. 2017), this publication provides a status quo of energy-related policies and success factors for the promotion of heating and cooling technologies based on renewable energy sources (RES-H/C technologies)
Renewable and Sustainable Energy Reviews
Cooling, refrigeration, and air conditioning processes are considered essential needs and major requirements for all human beings in our world today. However, the traditional vapor compression machines are dominating electricity consumers and their operation and propagation cause high electricity peak loads during the summer, especially in those countries with tropical climate. That is besides their refrigerants having high global warming as well as ozone layer depletion potentials. Providing cooling by utilizing a green energy such as solar energy is the key solution to electricity and pollution problems. Adsorption refrigeration systems that are driven by solar energy are mature technologies. They are proven to be suitable and applicable for refrigeration as well as airconditioning applications. Solar adsorption cooling technology is divided into physisorption and chemisorption systems. The physisorption machines include open and closed cycle operation. This paper presents a review on previous researches and developments of the solar driven closed physisorption refrigeration systems. The discussion includes, experimental and numerical simulation studies as well as methods that are suggested to improve the system performance.
Sustainable HVAC Systems in Commercial And Residential Buildings
Maintaining optimal temperature and air circulation are the basis of a comfortable indoor environment. This role is played by HVAC(Heating, Ventilation and Air conditioning) systems. All heating, ventilation and air conditioning system account for 60% of the World's total energy consumption this calls for a sustainable solutions for HVAC systems. We discuss many of such techniques used around the globe in this paper. The main objective is to minimise the energy consumption by shifting towards natural renewable sources while maintaining the required comfort level of a building.
Achieving sustainable buildings: the role of heating, ventilation and air-conditioning
Sustainable buildings, 2016
With the ever-increasing population and global economy, the dependency on usage of nonrenewable resources of energy is cumulating in direct proportion. Nevertheless, the non-renewable potential of these resources is certainly a leading worldwide issue, and one, which has gained substantial international interest over the past decades. Large and attractive opportunities exist to reduce building's energy use at lower costs and higher returns than other sectors. At the same time, substantial investments will be required to achieve this target as outlined by the Paris Agreement. These will require the combination of social, economic and environmental actions, including building energy codes, investment subsidies, labelling and reporting mechanisms, increased and trained workforce capacity, and evolving energy-efficient designs and HVAC technologies.
Refrigerants: There is still no vision for sustainable solutions
International Journal of Refrigeration-revue Internationale Du Froid, 2018
This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights The HFCs appeared on the market because of the Montreal Protocol. We have to learn from mistakes in the past. The bodies of the Montreal Protocol ignored the climate change issue. Policies as successful examples: Denmark and EU. Visions for the future with environmental refrigerants-Ammonia systems with a small charge, preassembled in a factory.-Carbon-dioxide systems are improved and now are efficient in hot climate as well.-R290 in split air conditioners with a small charge (150 g). HFO refrigeration systems: high price and uncertainty on eco systems? A new approach: PHASE-IN OF NATURAL REFRIGERANTS which are ozone and climate friendly; it means long term and sustainable solutions.
Renewable Heating and Cooling Solutions for Buildings and Industry
The 8th Annual International Sustainable Places Conference (SP2020) Proceedings, 2020
This workshop brought together a selection of H2020 EU-funded projects involving experts from the biomass, geothermal, solar thermal, and heat pump sectors to discuss a common strategy for increasing the use of renewable energy technologies for heating and cooling for buildings and industry.