Solar power and solar thermal hot water by localgirl


									Solar power and solar thermal hot water
In Hot Water

Heat & Power

Solar paybacks
Help the environment Gain independence from utility grid, be self-reliant Find peace of mind Make a statement about your values … Save some money?

So … is solar right for you?
Most likely.

But, take just a moment to consider …

For every $1 you spend on making your home more energy efficient, you can reduce your solar purchase by $3.

What to consider before solar?
1. Home construction techniques
Use alternatives to “stick-built,” such as ICFs (insulate concrete forms) or SIPs (structurally insulated panels)

2. Energy saving appliances:
For example: ENERGY STAR qualified refrigerator models use at least 15% less energy than required by current federal standards, and 40% less energy than the conventional models sold in 2001.

3. Efficient lighting
Fluorescent light bulbs:
Save $25 in energy costs over the life of each bulb Last 6 times longer than incandescent bulbs Consume 2/3 less energy

LED lighting: LEDs are where compact fluorescent bulbs were just a few years ago.
This 1.3-watt LED bulb costs about $35 and lasts 6,000 hours

The sun produces two types of energy:
Converts sunlight to electricity Converts sunlight to heat

Solar power

There are two types of power systems:

Stand-alone power

Uses for stand-alone power
When utility power is not available, such as at a cabin site or remote ranch When power bridging is required (such as during power outages) When there is a desire to store power (a desire for independence)

Grid-tied systems

Grid-tied systems
Operate in parallel with and are interconnected with the electric utility grid Allow you to collect a credit for electricity when you produce more than you use (this is called net metering) May or may not have battery backup

Solar hot water: A more accessible and affordable approach to solar energy

Two types of solar hot water collectors:

Vacuum tube panels Flat plates

Flat plate panels
Flat-plate panels are less costly, but more panels are needed.

Wahweap campground shower/laundry facility

Flat plate panels are basically an insulated box with a glass cover; copper or aluminum fins collect the heat, which is delivered to the storage tank by circulating fluids.

Evacuated heat tube panels

Evacuated tube technology is the most efficient, able to gain higher temperatures and still have good heat production under light to moderate cloudy conditions. A typical house with 4 people would require 1 30-tube panel. No water goes through the tubes themselves.

Here, mounts for evacuated tube panels are installed on the roof of a S. Utah home. The panels will heat all domestic water for this home, and supply the heat for most of the radiant floor. Any extra heat will be dumped in the hot tub.

Uses for solar-heated hot water
Radiant floor heat Domestic hot water Swimming pools/hot tubs Snowmelt

Radiant floor heat
Concrete floors provide an excellent storage medium, so a large solar storage tank is not needed.

Domestic hot water
Flat-plate panels create hot water for showers for visitors to the campground at Snow Canyon State Park.


PEX for radiant snow melt being installed on a driveway at Suncrest above Draper. Snowmelt is closed-loop system, circulating glycol, just like a solar system.

Swimming pools

This pool is located at 7,000 ft in the Ogden Valley,and reached 80 degrees in May.

What you’ll need inside your home for your solar hot water system

Here, the solar storage tank rests next to the water heater

At this off-grid cabin, the power system and the heating (radiant floor) systems share a closet.

Solar power and thermal on the job

Backup power system for KRCL radio’s broadcasting hub in Salt Lake City

Large off-grid strawbale estate in Colorado; Thermomax mounts can be seen at right. The solar thermal includes 4 Thermomax evacuated heat tube panels, producing about 200,000 BTUs a day.

The Gunnison Municipal Swimming pool boasts 48 panels, which heat the water to 86 degrees. 90% of the heating for this pool will be created by these solar panels year round, at 83 degrees

Wahweap laundry/shower center Lake Powell, 24 panels

Grid tied system in Cache Valley

The homeowner is a spunky 85-year-old woman

Bigelow home in SLC, remodel of older home; two collectors look like the skylights below.

Andrade home, Mill Creek area

8 flat plate panels; Handles all domestic water, heat

Seven solar collectors provide all this radiant heat for this Wanship home

Cabin in the Monte Cristo area

Power box under the porch houses the inverter

Cabin near Ant Flats, Weber Co.

Panels are pole mounted

Bivan home in Park City uses evacuated tube panels

Roberts home, Montpelier, ID, uses flatplate panels

Grid-tied solar power system in Pleasant View

A Sunny Boy inverter and disconnect are part of equipment for this simple grid-tied solar power system

Evacuated tubes provide heat for a Sedona, AZ, home

Flat plate panels heat a pool in New Harmony

8 flat plate collectors provide heat for In Hot Water shop in Eden

An isolated cattle ranch is powered by solar near Logan

Deer Creek Reservoir

Solar powers an isolated station for Qwest

The same wireless relay station, disguised as a rock!

Helpful web links: (Solar Energies Industries Association) (a PDF brochure on hot water heating) /tprdhw.htm (an independent comparison of solar thermal panels, Fla. Solar Center) (Solar Rating and Certification Corp.) (North Carolina Solar Center)

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