Jan 16, 2014 Lighting Design & Controls
Light therapy is becoming the most popular skin care treatment, and it seems everyone wants to try it. Why this sudden eagerness ? Because of the many skin concerns it can improve, naturally, without pain or side effects. Results amazes scientists and users who can now own their personal light therapy device that employs the same technology spas and dermatologists are equiped with : Light Emitting Diodes(LED).
If other forms of light therapy are actually used, LED light therapy is associated to skin care. There are mainly two colors associated to light therapy for the skin, because there are principally two skin issues people want to improve : acne and aging. Red light therapy is used for skin healing, thus it is used for both skin concerns. For acne purpose it will help to diminish acne scars for example. If used for anti aging, it will regenerate skin cells. Blue light therapy is used for acne only, the blue light penetrates the skin and kills the P. acne bacteria (Propionibacterium acnes). Acne starts to disappear, and light treatments also prevent future breakouts.
Here are several light therapy benefits :
Minimizes fine lines and wrinkles like crow’s feet
increases collagen and elastin, resulting in a firmer skin
enhances circulation, this brings more nutritional elements resulting in a younger and smoother skin
Improves skin tone
heals sun-damaged skin
Tights pore size
Reduces redness (inflammation caused by acne)
minimizes brown age spots
Balances sebum production
Light therapy is also used, in another form than LEDs such as daylight spectrum, for stress relief, pain relief, affective disorders, mood balancing and more. In the future, light therapy may be used to treat more medical, cosmeceutical, psychological and every day life disorders.
Post written by: The New Light
Nov 22, 2013 Lighting Design & Controls
Light is very important for our mental and physical health. Without sufficient light many people suffer from depression and ailments that they cannot really pinpoint. Depression can give rise to many ailments and can even develop into more serious mental problems.
Now there are several ways to combat this problem:
Light box therapy: (Phototherupy) this type of general therapy is also known as bright light therapy. Phototherupy requires the patient to sit near a fluorescent light box that simulates sunlight. Ideally, the light should be 2,500 lux to be effective, and daily exposure is recommended. A doctor will prescribe the right exposure strength and duration.
Seasonal Affective Disorder: The problem with depression in winter is known as Seasonal Affective Disorder or SAD. It is a known fact that many people get very depressed in winter time when there is less light, and even go so far to say that they are feeling less energetic and just not well. This condition can also give rise to overeating and a whole new set of problems. There are special light boxes for this disorder. They are called SAD light boxes. Again, before starting therapy consult your doctor.
Sleep and jet lag: Light boxes can help sleep disorders and jetlag. These devices can simulate daylight and nighttime, which helps people adjust to regular sleep hours. These light boxes help to reset the body’s clock that determines when you will sleep. This is very important as lack of sleep can cause serious accidents while driving and interference with many facets of your life.
Dementia and Alzheimer: With these disorders, the body’s natural clock or circadian rhythms gets disrupted, due to nerve and brain damage. This is further aggravated by poor sight in the elderly, which means that normal indoor light may not be sufficient for them to determine the difference between night and day. Light boxes are being used in experiments to see if the sleep and activity cycles can be improved with these patients.
Skin problems: Some skin problems such as: stretch marks, patches of psoriasis, vitiligo, and pale scars may be helped with UVB or UVAI light. These are the types of lights that tanning beds use. Caution should be taken to only focus the light on the skin to be treated and to avoid damage to normal skin. Be careful not to overexpose.
Colored lights: (Intense pulsed light therapy). Different colored floodlights are used for this light therapy. Different colors are thought to be better for different problems, for example:
1. Blue is good for helping to destroy acne bacteria
2. Green lights help with pigmentation problems, like age spots and liver spots.
3. Yellow is thought to aid vascular problems, such as rosacea and thread veins.
4. Green and yellow light is said to help fine lines and wrinkles.
5. Red is meant to help arthritis when directed at the exact point. It is also thought to be good for headaches.
When trying any of these light therapies, always consult your doctor. He will know if you have any latent ailments that could be aggravated by light therapy. Also, sometimes the duration and strength of exposure will need to be adjusted for the best effect.
Original post created by: The New Light
Nov 3, 2013 Energy Talks
Last week Houston investment banker and peak oil prognosticator Matt Simmons popped a plan to use wind, the generated electricity and air to manufacture ammonia. Then just use it to fuel cars. The price to start up is “only” $25 billion plus a new generation of cars for consumers to buy. Is ammonia, NH3, remotely practical?
Lets compare with first fossil petroleum, at less than $5 per barrel in the Middle East to more than $50 from oil sands and some offshore production, petroleum products sell profitably at prices that consumers can pay and keep a reasonably healthy economy intact. It’s the major source for now and subject to risk for pricing in the future, which risks the whole of the world’s economy.
Next would be biomass sources as in methanol and ethanol. Both are, or can be used with existing consumer products in fuel mixes, the infrastructure is already partly in place and the carbon cycle is current, using airborne CO2 and returning it for reuse. Light alcohols are undeniably energy positive, although much calculation gives wide variations. Light alcohols also are candidates for Direct Alcohol Fuel Cells that should offer simple and cheap means to get from fuel to electricity to motion.
Hydrogen, liquefied or stored as a gas, could be burned in internal combustion engines with little engine modification, but quite large portable and stationary storage costs are required. Hydrogen must also be ‘made,’ requiring energy and capital, for water electrolysis and then cryogenic storage or very high-pressure vessels or media to hold the hydrogen that use energy to function.
Ammonia then is interesting as it is a storage media with the ability to be both burned or used in a fuel cell. Ammonia holds 18% hydrogen by mass, more than cryogenically formed liquid hydrogen, and far beyond what sensible compression technology allows in comparable volumes. Is easy to store and stable. But:
Ammonia is a noxious, caustic vapor at room temperature requiring pressure and cooling to past 8 atmospheres for liquid containment at less energy by volume than ethanol or methanol. The hydrogen can be freed from ammonia as needed by catalysis at 500º C or simply be burned. Yet burning usually leaves 20% unburned and produces nitrous oxides, problems that technology should fix and exploit handily given time and resources.
There are more interesting pathways. The Danish Technical University is developing a system called “Amminex.” Amminex is an ammonia-based solid-state hydrogen storage solution: a tablet that can be held in your hand. The tablet is a metal ammine complex that stores 9.1% hydrogen by weight in the form of ammonia absorbed efficiently in magnesium chloride: Mg(NH3)6Cl2. The storage is completely reversible, and by adding an ammonia decomposition catalyst, hydrogen can be delivered at temperatures below 347º C (656º F). The tablets can be recharged with additional ammonia. The team is finding that the kinetics of ammonia adsorption and desorption with the metal ammine complexes are reversible and fast, and that the complex is simple to manufacture and easy to handle.
A company called U3K has patented technology (USPTO 7,140,187) (the u3kenergy.com link has lapsed) can convert urea (in a white solid form) to either ammonia or hydrogen for delivery to internal combustion engines and fuel cells in stationary or mobile applications. U3K’s system can provide internal combustion engines with ammonia or fuel cells with hydrogen “on demand.”
U3K’s claimed urea advantages are it is non-toxic, clean burning, non-explosive, and is more economical than refined petroleum products. Urea can fit into the existing liquid based fueling infrastructure. Existing engines can be retrofit cheaply. The capital cost of urea fueling stations is significantly less than the cost of existing gasoline stations. With current urea manufacturing technology, urea has a “well to wheel” efficiency that exceeds gasoline. And urea can be stored as a solid or a liquid.
So far we know that H2 can be effectively stored using alcohols, ammonia and to be complete, natural gas methane. From a system perspective methane is entrenched, both for fuel in homes, cars and electricity generation. Light alcohols are gradually becoming competitive without supports from government. Ammonia is still far underdeveloped.
For burning or oxidizing ammonia is at a disadvantage. But when considered from a fuel cell perspective ammonia has advantages. For systems development, ammonia might have a powerful role in stranded or isolated wind or solar installations as the concentration level is superior. Electrolysis can be comparatively efficient from a financial perspective when the cost of transmission lines is considered. Flowing ammonia vapor or liquid might be a low cost way to move stored energy in hydrogen.
At the use end all the fuels must be one means or another be stripped of the carbon or nitrogen atoms and in some fuels oxygen for the fuel cells to use the hydrogen. This step is where the crux of the competition may lie. Last year saw a paper in Science magazine reveal an alternative to stripping out the oxygen that might work across alcohols and for air batteries. Further checking shows that paths are being blazed to strip the hydrogen off fuels both in a process step and during the operation of some fuel cell designs. Lab units seem expensive, but with material development, commercial scale, and fuel price considerations, all of the light carbon based and ammonia fuels look like contenders.
Ammonia has an incredible advantage, the energy source could be free sunlight or dirt-cheap solar or wind. The alcohols need land surface area. Straight hydrogen is a devil to handle and contain. Methane is abundant now, but over time as more use is made of it the price will rise.
The key in ammonia and its disadvantage is the lack of any carbon, which adds to the energy content. There is little expectation that ammonia as a combustion motor fuel will make a market for itself on the merits. For fuel cell use the field is still pretty wide open, but the bio-based alcohols head start has made great strides.
From an electrical power generator to ammonia then on to fueling power generation ammonia makes sense. But can the economic case be made until fuel cell progress promotes demand?
The answer is ammonia can be a viable fuel. The next question is will the research and development make economic competitiveness possible.
Source: New Energy and Fuel
Jul 31, 2013 HVAC
The growth of mold in HVAC (Heating, Ventilation, and Air Conditioning) systems is a main contributor to poor indoor air quality. Mold spores are a prevalent part of bacteria and dust in the home. Ignoring a problem or potentially harmful situation involving poor indoor air quality can render an even more serious issue, so it should be taken care of immediately.
Mold allergies are a serious problem for many people. Those that are often exposed to poor indoor air quality are at a higher risk for developing some sort of respiratory complication. These people are often those that don’t even know that they could be vulnerable to such hazardous allergens.
The cause of inadequate atmosphere quality can stem from faulty HVAC equipment, poor air circulation, inappropriately operated or preserved HVAC systems, and not having a sufficient amount of external air. All of these things can cause the growth of the allergen, mold. Mold spores can lead to congestion, asthma, and other breathing difficulties for those that become exposed. During the time that HVAC systems operate they are able to transport considerable amounts of recirculated and outside air through the home or occupied space. The system becomes the channel through which toxic entities are spread.
It has been found that ultraviolet radiation is the most effective way to combat mold and other airborne bacteria in the home. UV rays can be used individually or can be combined with an EAC (Electronic Air Cleaner) to prevent or diminish the health risks that mold presents. UV light is able to restrict the reproduction process and growth of germs, allergens, and bacteria, such as mold.
To successfully kill microorganisms, found in an indoor atmosphere, ultraviolet energy waves are used. The UV radiation must make direct contact with the harmful bacteria to make sure that it is exterminated. The ultraviolet rays then infiltrate the organism, causing the molecular bonds to stop functioning properly and inducing mutilation of the cells. This remedy of doing away with mold spores in the HVAC system kills or sterilizes germs, rendering them unable to reproduce. The germs are either killed or sterilized, leaving them unable to reproduce. This is a guaranteed solution to reducing the allergens in the atmosphere in your home and improving your family’s overall quality of life.
Indoor air quality is an issue that is quickly becoming a priority problem in homes across the nation. Making sure that you and your loved ones are protected from harmful toxins is very important and should not be taken lightly. Having your HVAC system inspected and keeping up with its maintenance can mean the difference between breathing poor quality or high quality indoor air. Why not make the place that you spend a majority of your time a safer place to live and breath.