Solar water heatingPrint

In order to heat water using solar energy, a collector, often fastened to a roof or a wall facing the sun, heats working fluid that is either pumped (active system) or driven by natural convection (passive system) through it. The collector could be made of a simple glass topped insulated box with a flat solar absorber made of sheet metal attached to copper pipes and painted black, or a set of metal tubes surrounded by an evacuated (near vacuum) glass cylinder. In industrial cases a parabolic mirror can concentrate sunlight on the tube. Heat is stored in a hot water storage tank. The volume of this tank needs to be larger with solar heating systems in order to allow for bad weather, and because the optimum final temperature for the solar collector is lower than a typical immersion or combustion heater. The heat transfer fluid (HTF) for the absorber may be the hot water from the tank, but more commonly (at least in active systems) is a separate loop of fluid containing anti-freeze and a corrosion inhibitor which delivers heat to the tank through a heat exchanger (commonly a coil of copper tubing within the tank). Another lower-maintenance concept is the "drain-back": no anti-freeze is required; instead all the piping is sloped to cause water to drain back to the tank. The tank is not pressurized and is open to atmospheric pressure. As soon as the pump shuts off, flow reverses and the pipes are empty before freezing could occur.

Solar water heating scheme

Residential solar thermal installations fall into two groups: passive (sometimes called "compact") and active (sometimes called "pumped") systems. Both typically include an auxiliary energy source (electric heating element or connection to a gas or fuel oil central heating system) that is activated when the water in the tank falls below a minimum temperature setting such as 55°C. Hence, hot water is always available. The combination of solar water heating and using the back-up heat from a wood stove chimney to heat water[2] can enable a hot water system to work all year round in cooler climates, without the supplemental heat requirement of a solar water heating system being met with fossil fuels or electricity.

Solar water heating

24 Heating & Cooling provides 24-hour assistance with solar water heating services and repairs in Chicago and suburbs.

Share this page

Featured product

Two-stage, variable speed furnace
American Standard Platinum SV

Client testimonial

The wireless thermostat that was installed in our house has made an unbelievable difference to the temperature. I know that we will save a considerable amount on our fuel costs. Thank you for your friendly professional service. - Sarah, Berwyn
All rights reserved ® 2010-2014 24 Heating & Cooling, Inc · Your 24/7 Heating and Cooling Chicago Area Service
* with qualified ENERY STAR equipment used · † some restrictions apply · Economy Web Hosting

We provide our heating and cooling (HVAC) services and products for the following cities and locations:

Niles, IL · Park Ridge, IL · Glencoe, IL · Broadview, IL · Prospect Heights, IL · Tinley Park, IL · Wilmette, IL · Palos Hills, IL · Geneva, IL · Worth, IL · Darien, IL · Hanover Park, IL · Naperville, IL · Aurora, IL · Saint Charles, IL · Franklin Park, IL · Bensenville, IL · Palatine, IL · Westmont, IL · Chicago Ridge, IL · Romeoville, IL · Chicago, IL · South Elgin, IL · Deerfield, IL · Alsip, IL · Joliet, IL · Evergreen Park, IL · Crystal Lake, IL · Addison, IL · Deer Park, IL · Buffalo Grove, IL · Winnetka, IL · Waukegan, IL · Elgin, IL · Downers Grove, IL · Lockport, IL · Lake in the Hills, IL · Palos Heights, IL · Lake Villa, IL · Brookfield, IL · Vernon Hills, IL · Justice, IL · Northfield, IL · Plainfield, IL · Elmhurst, IL · Oak Lawn, IL · Wood Dale, IL · Des Plaines, IL · Wheeling, IL · Woodridge, IL · Gurnee, IL · Glenwood, IL · Lake Bluff, IL · Yorkville, IL · Barrington, IL · Rolling Meadows, IL · Harwood Heights, IL · Algonquin, IL · Clarendon Hills, IL · Cicero, IL · Glenview, IL · Lemont, IL · Flossmoor, IL · Northbrook, IL · Orland Hills, IL · Libertyville, IL · Hazel Crest, IL · Oak Brook, IL · Elmwood Park, IL · Roselle, IL · Bolingbrook, IL · Crestwood, IL · Burr Ridge, IL · Willow Springs, IL · Frankfort, IL · Norridge, IL · Bloomingdale, IL · Skokie, IL · Hickory Hills, IL · Batavia, IL · Arlington Heights, IL · Mount Prospect, IL · Palos Park, IL · Hoffman Estates, IL · Berwyn, IL · Bedford Park, IL · Hinsdale, IL · Glen Ellyn, IL · Burbank, IL · Mokena, IL · Lisle, IL · Lakemoor, IL · Schaumburg, IL · Lake Zurich, IL · Countryside, IL · Northlake, IL · Evanston, IL · Willowbrook, IL · Lake Forest, IL · Sheridan, IL · La Grange, IL · Carol Stream, IL · Villa Park, IL · Bridgeview, IL · Western Springs, IL · Oswego, IL · Glendale Heights, IL · Aroma Park, IL · Lombard, IL · Oak Forest, IL · Elk Grove Village, IL · Forest Park, IL · Oak Park, IL · Mundelein, IL · Antioch, IL · Midlothian, IL · South Barrington, IL · Riverside, IL · Orland Park, IL · Itasca, IL · Westchester, IL · Bartlett, IL · Highland Park, IL ·
www.24heatingcooling.com © 2014