Thermal insulation

Chapter-III OPERATING PRINIPLE AND LOSSES IN PEM FUEL CELL The polymer membrane is the heart of the PEM fuel cell which has some unique features. It allows protons but it is impermeable to gases, and hence it is known as a Proton Exchange Membrane. The membrane, which is squeezed between two electrodes (electrically conductive carbon cloths or carbon fiber papers) acts as electrolyte. A layer of catalyst particles (platinum) is placed at the interface between the porous electrode and polymer…

Emission of Particulate Matter (PM10, PM2.5, and PM0.1) comprises a considerable fraction of urban air pollution (Laden et al. 2006, Shackleton et al, 2013). Long term exposure of airborne particulates matter is directly associated with post neonatal infant mortality (Laden et al. 2006), Sudden Infant Death Syndrome (SIDS) (Tracey et al. 2006) and various disease conditions such as; cardiopulmonary, lung cancer (Pope III, 2002), atherosclerosis (Araujo, 2011) and asthma (Anderson et al., 2013).…

Packaging is significant both to consumers and producers. To the consumer, excellent packaging means good storage of products; thus, preventing them from contamination(Schafer, 2015). For instance, no one would want to eat poorly packaged food that may be subjected to contamination. The consequences may be dire and costly. Different materials have been used for product packages, but plastics lead the way in terms of the most frequently used packaging material by many industries globally. A large…

with recycled materials, purchasing products with less packaging can help reduce waste. Also, just recycling water bottles and waste in your home can save pounds of carbon dioxide. Using less heat and air conditioning is another way to help. Adding insulation to your homes can lower heating cost. This will help in reducing the amount of energy to heat and cool homes. You can also turn down your air condition at night or during the day to keep temperatures moderate. Upgrading to florescent lights…

In addition, penguins entirely replace their whole plumage each year and must spend a long time fasting ashore because the consequent reduction in thermal insulation precludes staying in cold antarctic and subantarctic waters for feeding. The duration of fasting of molt varies from 2-5 weeks. (Klemens Pütz, Joachim Plötz (1991), Moulting starvation in emperor penguin (Aptenodytes forsten) chicks Polar Biology…

1. Introduction: To plan with high efficiency for environmental change, the chief challenge is to deal with the drivers in developing countries instead of developed countries. This statement expresses the idea of in order to achieve the ideal result, it is practical and realistic to draw up some plans and follow through certain policies involving the drivers in developing countries. Although it might be hard in the process of carrying out the actual project. From my perspective, the…

Mummification is a modification of putrefaction characterised by the dehydration of the tissues converting the body into a leathery mass of skin and tendons surrounding the bone. The internal organs are often decomposed but preserved. Skin shrinkage may produce large artefactual splits mimmicking injuries, particularly seen in the groins, around the neck, and the armpits. Mummification develops in conditions of dry heat, especially when there are air currents,e.g. in a desert or inside a…

important characteristics and criteria for choice All of the following criteria are interrelated. The goal is that you can compare different models of shoes and identify the most suitable model for your needs. Obviously, you can not combine all criteria. That would be like wanting a sports car in which you can get your entire family. The main goal is for you to find a pair of shoes with which you can work comfortably and safely. If you must choose, always favor safety over convenience.…

While other side, the effects of heat stress on human associated with cognitive abilities are not recognized fully. Though, it is very necessary to focus on the effects of the thermal environment on human cognitive performance for many substantial motives. Firstly, the WHO states that a good human health consists on well-being of mental, physical and social. The understanding of cognitive performance in a better way under the heat…

Insulation chosen must by of high R-value, thus having better thermal resistance. But at the same time to be of an adequate price and comforting availability for convenience. In addition to that, instead of using conventional heating system, heat pumps can be implemented since they are…