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unbiased & independent report on the condition of their roof covering
without the undue influence of profit for maximising repairs. To be
objective & practical in offering solutions to any problems
revealed.
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include:-
Prospective house purchasers.
Home owners.
Commercial Tenants with repair duties.
Chartered Building Surveyors.
Landlords.
Expert witness for dispute resolution.
Building Agents for the preparation
of maintenance schedules.
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Construction article - 8
Here Comes The Sun: Solar Energy is Becoming More Attractive for Mainstream
Consumers
The price of a barrel of oil has never been higher ($62.00+ in summer 2005
even before the chaos caused by Katrina). Some say this is a temporary spike,
but more and more analysts are agreeing that this kind of pricing is here
to stay. World consumption is at an all time high and given the new thirst
for oil in China and India it is unlikely to diminish. According to International
Energy Outlook, global demand is expected to continue to increase by as much
as 59% in the next fifteen years.
Already, consumer energy bills have been increasing on average 6.5% per year
for the last thirty years in the United States. Given the dramatic rise in
the cost of producing energy using traditional non-renewable resources, this
rate is bound to be overtaken by unheard of price increases in the very near
future. And for consumers who are becoming more and more environmentally
conscious, the thought of the millions and millions of tons of CO2 and other
bi products being released into the atmosphere annually through the use of
fossil fuels in creating energy is very alarming.
It is a no brainer that our reliance on oil to create energy leaves us very
vulnerable. There are renewable technologies that produce energy, but the
problem has been one of cost effectiveness. It has always been cheaper to
supply energy using fossil fuels, and consequently, renewable sources such
as solar or wind power have not taken off. But the situation now appears
to be changing. More and more, our consumption of energy is outstripping
supply. The grid can barely keep up with demand and rolling blackouts are
no longer just a concept. No wonder governments are looking for alternatives.
And no wonder everyone is talking solar once again.
In 1985 annual worldwide solar power system installation accounted for 21
megawatts of power. By 2004, this had multiplied to an incredible 927 megawatts
in new installation power production alone. The demand for solar produced
energy over the last several years has increased annually about 25%, although
in 2004 sales were up a whopping 67% from the previous year.
There are several reasons for this increase in popularity for all things
solar powered. Beyond the obvious environmental considerations and the privilege
of not having to rely on power from a grid that is aging and stretched to
capacity, solar is getting cost effective. While traditional energy production
gets more expensive, technological advances are making solar power cheaper.
In 1980 the cost of harvesting energy from the sun stood at about $100 per
watt. Literally a hundred times more expensive than the going rate of
electricity, these systems were not economically viable. By 1999 however,
technology had reduced this to about $4 per watt and costs have continued
to decline by about 5% per year since. The Return on Investment is becoming
very attractive for many commercial organizations and consumers.
Efficiencies have been realized in several technologies. The inverters that
transform the collected DC energy into usable AC energy used to deliver only
about 65% efficiency. 35% of the collected energy was lost in the transformation
process. Todays transformers are so efficient they deliver up to 96%
of collected energy into usable AC current.
Photovoltaic technology has also made solar collection far more efficient.
Twenty years ago, only 5% of the suns energy hitting a solar charging
panel was harvested. This figure is now in excess of 15% and will continue
to climb as more efficient compounds are designed and introduced in the
manufacture of these photovoltaic panels.
All levels of government are increasingly looking at solar to provide stable,
cost effective and environmentally friendly power. 35 states now have some
kind of rebate program for homeowners that install solar power systems. And
this is not just the southern sunny states. While California
is the clear leader in promoting solar powered energy solutions (a program
introduced in 2003 is promoting the introduction of solar powered energy
systems into a million homes over the next several years) New Jersey and
New York are next in line for solar investment.
At the municipal level, many jurisdictions have introduced solar solutions
for traffic and streetlights. 50% of the energy used to run the City of
Sacrementos water purification plant is solar. NASA uses solar powered
energy systems in many of its buildings. And governments are not using solar
just because it is good for the environment and sets an example for commercial
entities and consumers (although these benefits cannot be lost on them!).
Theyve concluded that opting for solar systems will save them hundreds
of thousands of dollars.
With so many rebate programs today homeowners are coming to the same conclusions.
Once the initial return on investment is recouped (as early as 4 to 6 years
with the rebate programs in California for example), solar users dont
have any additional energy bills, almost no maintenance to worry about and
are not slave to an electrical grid that is becoming more and more fragile
as demand outstrips supply. No wonder solar power is getting attention!
Solar power is still more expensive than traditional energy production methods,
but the gap is narrowing every year. Solar power applications are also
multiplying at an amazing rate. House heating, solar pool lighting and heating,
hot water tank heating, calculators, flashlights, solar garden lighting and
on and on. Solar is clean, its efficient and its here to stay.