Polymer Electrolyte Fuel Cells have high-power density, rapid startup, and low-temperature operation (around 80 to 120 C), and so are ideal for use in applications such as energy transport and battery replacement. The electrolyte used is a proton conducting polymer. This is typically a perfluorinated polymer, though other hydrocarbon-based membranes are under development in an attempt to reduce cost or to enable operation at temperatures approaching 200 C. The catalytically active layer sits adjacent to the membrane, supported on a PTFE treated carbon paper, which acts as current collector and gas diffusion layer. For operation on pure hydrogen, platinum is the most active catalyst, but alloys of platinum and ruthenium are used when higher levels of carbon monoxide are present (CO is a poison in all low temperature fuel cells). (more…)
Fuel cells are typically classified according to type of electrolyte. While many varieties of fuel cells have been demonstrated ...
The fuel cell can trace its roots back to the 1800s when a Welsh-born, Oxford-educated barrister, Sir William Robert Grove, realize ...
Transport applications tend to demand rapid start-up and instant dynamic response from fuel cell systems, so a high-temperature ...
A fuel cell is an electrochemical device that combines hydrogen with oxygen to generate electricity, heat and water to produce. ...
Alkaline fuel cell, often known as the Bacon fuel cell following the British inventor’ name. It has become the most created fue ...
Spring is here, which means that the summer heat is already here in Arizona. We all know how essential having an effective air conditioning system in the home is to our comfort during an Arizona summer - as well as how expensive it can be to cool a home through the long, hot days, when temperatures can reach 122 degrees Fahrenheit!
Replacing that old air conditioner or upgrading to a central air conditioning system instead of using window units could save you a lot of money this summer and for many summers to come. (more…)
Global warming, CO2 emissions, deforestation and loss of biodiversity on the planet are just side effects of our carbon footprint. ...
Heating and Cooling systems can be a major contributor to a homes energy costs and associated greenhouse gas emissions. For som ...
You’re paying a lot more for energy of all kinds these days—oil, gas, and electricity cost double (and in some cases, nearly tr ...
Ceiling fans are a popular room addition; comfort can be easily obtained with a flip of a switch. An immediate cooling breeze is cr ...
Don't sweat it out when you don't have to. Got your A/C running and still feel warm? Here are some tips that will help keep you ...
Biomass has been a main energy sources in the world since the beginning of civilization. It has been important in development processes, including early stages of industrialization in several countries. In Sweden, for example, the first concerns about preservation date from the seventeenth and eighteenth centuries, resulting from the recognition of the central role played by forests in energy provision. Biomass was also essential in the initial development of the iron industry in Sweden and, later on, the same happened in Brazil, where charcoal is still largely utilized in iron reduction. Biomass remains a major source of energy in many countries. (more…)
Over the last decade, the number of countries researching the potential of biomass and bioenergy for energy services rose rapid ...
The convention aims not only at stabilizing CO2 emissions in developed countries but also at ultimately reducing man-made CO2 e ...
Indoor air quality (IAQ) research deals with the presence, levels, health effects, and control of physical, chemical, and biologica ...
The relationship of gross national product per capita to energy consumption per capita for most countries of the world correlat ...
Bioenergy produced from biomass is sometimes called a carbon-neutral energy source, because the same quantity of carbon released wh ...
Ceiling fans are a popular room addition; comfort can be easily obtained with a flip of a switch. An immediate cooling breeze is created by an electric motor with rotating blades. That motor uses electricity. Ceiling fan motors are not large, but energy can be wasted. Read on for tips on operating your ceiling fans so that you can be comfortable and save home energy.
Ceiling fans have a cooling effect, but do not cool. (more…)
Don't sweat it out when you don't have to. Got your A/C running and still feel warm? Here are some tips that will help keep you ...
If your house has no attic (most flat-roof houses don’t), chances are there’s a cockloft, a space between roof and ceiling, at ...
All homes should be built with solar in mind. It could add to the beauty of a home, such as the early morning sun at a breakfast no ...
If a space is occupied on a predictable schedule, you can use either timeclocks or setback thermostats to turn the conditioning ...
Global warming, CO2 emissions, deforestation and loss of biodiversity on the planet are just side effects of our carbon footprint. ...
If a space is occupied on a predictable schedule, you can use either timeclocks or setback thermostats to turn the conditioning units on and off. A setback thermostat is a heating thermostat/ cooling thermostat with an internal timeclock that changes the space temperature settings at different times.
A setback thermostat normally operates through the thermostat controller circuit of the conditioning heating units. (more…)
Nowadays, a lot more people are increasingly aware of the amount of energy they consumed everyday and what effect it was having ...
The comfort heating system in a building brings itself to the concept of complete heating operating unit. In order to work prop ...
In today's times staying in a budget is very important. So doing maintenance to certain things yourself can be a good way to st ...
Here, the sensitivity of energy demand to climate is measured two ways. The first method uses elasticities that provide simple summ ...
These days we have two main concerns in the world of business and finance. First the greenhouse global warming and second the finan ...