Vdc

Battery Charging

Features

► 5-Year Warranty (Industry's Longest)

► Low Noise Under All Conditions

► Bergey "Tornado-Tuff" Ruggedness

► Advanced Airfoil and Oversized Neo Alternator

► AutoFurl "No Worry" Storm Protection

► Fail-Safe Design, No Dump Load Required for Structural Safety

► Upgraded Multi-Function Microprocessor Controller (new)

► Boost Converter Provides Charging at 6 mph

► New "Slow-Mode" Idles Rotor When Batteries are Full

► Push Button Electric Brake (new)

► All-Inclusive Tilt-up Towers: 30', 42', 64', 84', and 104'

► Tower Winch System using Hand Drill Power

► Installation & Support by Over 500 BWC Dealers

The Bergey XL.1 24 VDC battery charging wind system is the most technically advanced small wind turbine on the market today. It provides superior energy production performance with the "Tornado Tuff" ruggedness that has made Bergey turbines best sellers since 1980. And, best of all, the XL.1 is value priced to give you the most bang for your buck.

The XL.1 now features an upgraded PowerCenter controller that idles the rotor once the batteries are full (Warning: Be prepared to spend hours flipping lights on and off to cause the rotor to speed up or slow down. Highly addictive to techies.) and provides a convenient push button brake function. In addition, we doubled the dump load capacity (to 60A) and gave it proportional (PWM) control to more accurately maintain battery voltage, added a "wattmeter function," made customizing set-points a snap, and added a polarity checker for the wind and PV inputs.

Compare features, performance, price, reputation, and warranties. We think you will find that the Bergey XL.1 is the clear choice for your home power system. Get product information and find a dealer near you by visiting our web site: www.bergey.com.

• 60A Wind Regulator

• 30A Solar Regulator

• 60A Dump Load Control Circuit

• Voltage Booster for Low Winds

• Battery and System Status LEDs

• "Wattmeter" LED Function

• Timed Equalization Function

• Push Button Rotor Brake

• Slow Mode Rotor Idling

• Easy Set-Point Adjustment

• Polarity Checker

PowerCenter Controller

• 60A Wind Regulator

• 30A Solar Regulator

• 60A Dump Load Control Circuit

• Voltage Booster for Low Winds

• Battery and System Status LEDs

• "Wattmeter" LED Function

• Timed Equalization Function

• Push Button Rotor Brake

• Slow Mode Rotor Idling

• Easy Set-Point Adjustment

• Polarity Checker

Typical Performance: 5.2 kWh DC per day

4 Times More Energy Than the Air 4031 1.8 Times More Energy Than the Whisper H402

1-Air is a registered trademark of Southwest Windpower, Inc.

2-Whisper is a registered trademark of Southwest Windpower, Inc.

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Wl'JDPOWER

Simplicity^Reliability^Performance

11.2 mph (5 m/s) Average Wind Speed at Hub Height, Rayliegh Distribution.

Based on manufacturer's published power curves.

2001 Priestley ave. NORMAN, OK 73069 T: 405—364—4212 F: 405-364-2078 [email protected] WWW.BERGEY.COM

© 2002 Bergey Windpower m n^^csHQ gcd©

A Heat Pump Primer

John Lynch

©2003 John Lynch

Heat pumps are devices that supply more energy than they consume by extracting low-grade heat from the surrounding air or water. Heat pump systems can supply as much as 4 KW of heat output for just 1 KW of electrical energy input.

A ground source heat pump, in heating mode, extracts heat from the moisture in the ground and transfers it to the air inside a building. In cooling mode, the heat pump extracts heat from the air within a building and transfers it to the earth outside the building. This article deals primarily with ground source heat pumps in heating mode.

Earth as Solar Collector

The earth absorbs about 50 percent of the solar energy that it receives from the sun. The amount of this stored energy that can be extracted from the earth is greatest in soils with a high moisture content. At a depth of a few feet, the soil temperature varies very little throughout the year.

Heat is extracted from the soil by means of a fluid contained in inexpensive, buried, plastic tubing (polyethylene or polybutylene). The hardware consists of a heat pump connected to lengths of small-diameter pipes (known as the collector). These are buried underground in your garden or driveway, or in a river or lake. Water (with antifreeze in very cold climates) circulating through the pipes "absorbs" low-temperature heat from the ground. The heat pump extracts the heat from this water, concentrates it to high-temperature heat, and transfers it to the area to be heated.

A heat pump is similar in operation to a refrigerator, except that the refrigeration cycle is reversed when the heat pump is heating. Many of the components are the same— condenser, compressor, and evaporator. The footprint and noise level are also comparable to a fridge, and the units can be located indoors or outdoors.

Collector

Various possible configurations for the collector are shown in the diagrams. The choice of collector may be constrained by the availability of experienced contractors to install the optimum set-up for your application. This may affect the cost and performance of the system.

Heat Pump Operation

Compressor:

Increases the temperature and pressure of the refrigerant while reducing its volume

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Compressor:

Increases the temperature and pressure of the refrigerant while reducing its volume

Collector:

Heat from the water in the earth transfers to the fluid in the buried plastic tubing

Evaporation:

Antifreeze solution enters the heat pump where heat is exchanged to the refrigerant fluid, which evaporates

Collector:

Heat from the water in the earth transfers to the fluid in the buried plastic tubing

Evaporation:

Antifreeze solution enters the heat pump where heat is exchanged to the refrigerant fluid, which evaporates

Condensation:

Heat is transferred from the condensing refrigerant to the water circulating through the space heating system

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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