نتایج جستجو برای: energy change
تعداد نتایج: 1218509 فیلتر نتایج به سال:
energy crisis, global warming and other environmental issues are what motivate researchers to find new strategies to reduce energy consumption in buildings. recently, using phase change materials (pcm) in the building’s envelopes has drawn significant attention as an energy-saving method, which helps in increasing the building’s thermal capacity. in the present research, the effects of the main...
Interpretation of gravity as entropic force makes some corrections in Friedmann equations. According to calculations of Easson, Frampton and Smooth, the entropic force addss correction terms to Friedmann equations. It’s shown that these corrections change the second type of singularity to the third one in Friedmann equations. Considering Friedmann equations, even without entropic force at leas...
An experiment with a 33 factorial arrangement in a completely randomized design with 450 day-old broilers was conducted to study the effect of energy level and time of change from starter to finisher diets on performance and economic aspects of broilers. Broiler chickens were fed at three levels of dietary energy (2800, 3000, and 3200 KcalME/Kg) from 1-42 days of age. Starter and finisher diet...
An experiment with a 33 factorial arrangement in a completely randomized design with 450 day-old broilers was conducted to study the effect of energy level and time of change from starter to finisher diets on performance and economic aspects of broilers. Broiler chickens were fed at three levels of dietary energy (2800, 3000, and 3200 KcalME/Kg) from 1-42 days of age. Starter and finisher diet...
The ongoing energy transition toward more sustainable systems implies a change in the values for which such are designed. however is not just about sustainability but also like security and affordability, we witness emergence of new justice democracy. How can understand value changes how or should they affect design future systems? This introduction to special section on introduces main themes ...
in recent years, the issue of energy consumption modeling techniques in the building sector has been widely considered by researchers and managers. researches indicate that energy consumption in residential sector is one of the main parts of the total consumption. moreover, the urban residence is supposed as a significant consumer of energy in every country and therefore a focus for energy cons...
Many studies conclude that the rise in global food prices due to higher demand from the development of biofuels, climate anomalies, and increased of oil prices. Not only the food commodity index rose more than 60 percent, nonfood commodity price index also rose over 60 percent and crude oil price index has increased even further above 60 percent. The purpose of this study is to analyze the impa...
phase change memory devices Kyle L. Grosse, Eric Pop, and William P. King Deptartment of Mechanical Science & Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Ur...
Passive solar systems such as solar chimneys need solar radiation in order to work. Therefore, they cannot present stable natural ventilation when solar energy vanishes: to have a more robust and stable condition, solar energy should be stored during the day and released back during the night. Phase change materials can save additional thermal energy during the day and release it during the...
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