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Hi-Tech Energy Solutions, LLC |
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Midwest's #1 Green Components Supplier! |
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Solar-Kits and How It Works |
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How our Drainback systems make hot water from the sun The GL-30 Differential controller (10) starts both Taco pumps (8 and 13) when the controller detects useful solar heat available at the sensor (2) attached to the solar panel (3). Useful solar heat is available when the temperature in the solar panel is significantly higher than the temperature of the water at the bottom of the storage tank measured by a sensor (15) at that location. The Taco 009-BF5 (13) begins circulating the 8 gallons of water in the DBHX drainback tank's reservoir (14) by pumping it through the solar panel on the roof and back into the reservoir tank in a continuous loop. The water heats up as it passes through the solar panel. Note: The DBHX tank's internal heat-exchanger coil (12) is immersed in the tank's reservoir water. The Taco 006-B4 (8) begins circulating the potable water from the larger solar water storage tank (11) through the EDX internal heat exchanger (12) and back. Heat transfers via the heat-exchanger from the warmer solar heated water in the EDX reservoir (14) to the cooler potable water in the heat-exchanger coil (12). Both pumps continue circulating fluids and the controller continues monitoring the temperature between the solar panel and the solar water storage tank. Automatic operations The controller (10) stops the pumps when it senses useful solar heat is no longer available. There is no useful heat to collect when the temperature at the bottom of the solar storage tank reaches about the same temperature as the solar panel, i.e. when there is not a significant temperature difference (differential) between the solar panel and the solar water storage tank. The controller starts the pumps again when useful heat is available. The ON-OFF cycle of the pumps continues throughout the day maximizing the availability of solar heated water. At night the solar system stays off. The system activates the heating cycle again the next day, when the controller senses direct or indirect solar light heating the solar panel. |
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Solar Thermal — Kits and Operation — Commercial Uses | Photovoltaic | Solar Ventilation | Solar Links |
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1524 Randolph Avenue · St. Paul, MN 55105 · Phone: 651-204-0922 Fax: 763-374-3879 · E-mail: info@hitechebergysolutions.com |
