React: self-sufficient renewable energy air-conditioning system for Mediterranean countries

Desalination ◽  
2008 ◽  
Vol 220 (1-3) ◽  
pp. 600-611 ◽  
Author(s):  
Toufic El Asmar
Keyword(s):  
Renewable Energy ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Mediterranean Countries

Performance Value Index of the Solar Air-Conditioning System-PVI

2008 ◽  
Author(s):  
Yuefen Gao ◽  
Xutao Zhang ◽  
Guohua Shi
Keyword(s):  
Renewable Energy ◽  
Air Conditioning ◽  
Air Conditioner ◽  
Performance Indices ◽  
Air Conditioning System ◽  
New Energy ◽  
Energy Application ◽  
Solar Application

Presently, the performance of the air-conditioner or the air-conditioning system is usually valued based on some performance indices. However, it is deficient to evaluate the performance of the air-conditioning system which uses the new energy or renewable energy only based on the indices mentioned above. According to the defects and based on the works of the solar application, a new index defined PVI is put forward to evaluate the performance of the solar air-conditioning system rationally, which is significant to the new energy or renewable energy application.

Exergy Analysis and Optimization of a Building Air Conditioning System in Tropical Climate

2014 ◽  
Author(s):  
Ricardo Salazar ◽  
Enrico Sciubba ◽  
Claudia Toro
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Air Conditioning ◽  
Energy Use ◽  
Exergy Analysis ◽  
Electric Energy ◽  
Point Of View ◽  
Primary Sources ◽  
Renewable Energy Consumption ◽  
Air Conditioning System

The space conditioning sector is one of the highest exergy consumers and least efficient from the point of view of primary-to-end-use matching. Exergy analysis can be considered as a reliable tool for analyzing and optimizing energy consumption related to building conditioning systems. The present study presents a comparative exergy analysis of the air conditioning system of the TOTAL S.A. offices located in Caracas, Venezuela to finally achieve a reduction of the global electric energy use of the considered building. Starting from the provided thermal cooling load, different possible cooling chains (primary-to-final energy conversion chain) are considered in order to locate the thermodynamically more efficient one from an exergetic point of view. The internal air handler unit, which provides for the cooled and dehumidified air to the building, is fed by the energy obtained from different possible converters of renewable energy primary sources. Specifically, solar and hybrid photovoltaic-thermal (PV/T) panels coupled with an absorption refrigeration machine and with an ejector refrigeration cycle are analyzed. The study that has been carried on leads to identify the most convenient matching between final use and primary sources allowing to substantially reduce the global non-renewable energy consumption of the considered building.

Klimatisierung von Gebäuden mit hohen Komfortanforderungen unter Verwendung regenerativer Energie/A renewable energy based air conditioning system for buildings with high comfort requirements

Bauingenieur ◽  
2016 ◽  
Vol 91 (07-08) ◽  
pp. 288-296
Author(s):  
Matthias Schuck ◽  
Arne Speerforck ◽  
Peter Niemann ◽  
Jürgen Grabe ◽  
Gerhard Schmitz
Keyword(s):  
Renewable Energy ◽  
Air Conditioning ◽  
Air Conditioning System

Es wird ein geothermisch- und sorptionsgestütztes Klimatisierungssystem und das Potenzial eines dynamisch regelbaren Erdreichwärmeübertragers untersucht. Dabei werden messtechnische Ergebnisse beider Systeme gezeigt und erörtert. Bei dem untersuchten Klimatisierungssystem lässt sich der elektrische Energiebedarf auf die Hilfsenergien beschränken, sodass dieser im Vergleich zu einem konventionellen System um 76 % reduziert wird. Prozessbedingt findet eine Verlagerung des Bedarfs von elektrischer zu thermischer Energie statt; die erforderliche thermische Leistung des sorptionsgestützten Systems ist um den Faktor 2,4 höher. Die thermische Energie kann in der Regel jedoch solarthermisch bereitgestellt werden. Als Schwachpunkt verbleibt die Abdeckung von Spitzenlasten, die bei Klimaanlagen zwangsläufig auftreten. Abhilfe sollen hier Luftinjektions-Erdreichwärmeübertrager schaffen, wobei eine künstliche Grundwasserströmung zur Regelung des übertragbaren Wärmestroms genutzt wird. In numerischen und experimentellen Untersuchungen konnte gezeigt werden, dass sich die Entzugsleistung im stationären Betrieb durch Luftinjektion um den Faktor 2,5 erhöhen lässt; kurzzeitig ist eine Leistungssteigerung um den Faktor 5 möglich. Dies ist vor allem für die Spitzenlastabdeckung von Klimatisierungssystemen vielversprechend.

Life Cycle Inventories of Renewable Energy Construction Project — Energy Consumption and Direct Emission

2012 ◽  
Vol 193-194 ◽  
pp. 180-183
Author(s):  
Yue Ren ◽  
Jie Ren
Keyword(s):  
Renewable Energy ◽  
Life Cycle ◽  
Energy Consumption ◽  
Air Conditioning ◽  
Construction Project ◽  
Construction Stage ◽  
Air Conditioning System ◽  
The Sustainable Development ◽  
Direct Emission ◽  
Total Life

Renewable energy construction project can promote the sustainable development. The life cycle list of the air conditioning system of a renewable energy construction project has been established. Calculate this project’s energy consumption and emissions at construction stage and operation stage. The emissions include CO2、SO2、NOx、CO、CH4、PM、NMVOC and NO2. This project in the whole construction stage of the energy consumption is 17861224.1 MJ, accounting for 23% of the total life cycle energy consumption.

ANALYSIS OF COMPETING VARIANTS OF AIR CONDITIONING SYSTEMS WITHOUT AIR EXTRACTION FROM ENGINES AT THE STAGE OF PASSENGER AIRCRAFT ONBOARD SYSTEMS CONCEPTUAL DESIGN

2019 ◽  
Vol 6 (3) ◽  
pp. 80-85
Author(s):  
Denis Igorevich Smagin ◽  
Konstantin Igorevich Starostin ◽  
Roman Sergeevich Savelyev ◽  
Anatoly Anatolyevich Satin ◽  
Anastasiya Romanovna Neveshkina ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Air Conditioning ◽  
Research University ◽  
Cooling System ◽  
Fuel Efficiency ◽  
Air Cooling ◽  
Moscow Aviation Institute ◽  
Air Conditioning System ◽  
Low Efficiency ◽  
Air Conditioning Systems

One of the ways to achieve safety and comfort is to improve on-board air conditioning systems.The use of air cooling machine determines the air pressure high level at the point of selection from the aircraft engine compressor. Because of the aircraft operation in different modes and especially in the modes of small gas engines, deliberately high stages of selection have to be used for ensuring proper operation of the refrigeration machine in the modes of the aircraft small gas engines. Into force of this, most modes of aircraft operation have to throttle the pressure of the selected stage of selection, which, together with the low efficiency of the air cycle cooling system, makes the currently used air conditioning systems energy inefficient.A key feature of the architecture without air extraction from the main engines compressors is the use of electric drive compressors as a source of compressed air.A comparative analysis of competing variants of on-board air conditioning system without air extraction from engines for longrange aircraft projects was performed at the Moscow Aviation Institute (National Research University).The article deals with the main approaches to the decision-making process on the appearance of a promising aircraft on-board air conditioning system at the stage of its conceptual design and formulated the basic requirements for the structure of a complex criterion at different life cycle stages.The level of technical and technological risk, together with a larger installation weight, will require significant costs for development, testing, debugging and subsequent implementation, but at the same time on-board air conditioning system scheme without air extraction from the engines will achieve a significant increase in fuel efficiency at the level of the entire aircraft.

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