Solar heated houses

Does your house have air conditioning, or a heat pump Do you have solar he,- ig, a Jacu22i bath, swimming pool, aquarium, solar heating, a roof mounted water storage tank, a well, a power assisted commode, a motorboat, a jet ski, ATV or camper Then you have even more mechanical sealed pumps. We have mechanical sealed pumps in practically all facets of our everyday life, and these pump seals last for years wii problems. 

Ten houses were selected from past studies. Four of the houses were measured in two different seasons to assess the effect of weather changes. Houses were selected to exemplify both old and recent construction and to include wood, oil, and solar heat. 

Kluepfel DA, Nyczepir AP, Lawrence JE, Wechter WP, Leverentz B (2002) Biological control of the phytoparasitic nematode Mesocriconema xenoplax on peach trees. J Nematol 34 120-123 Kodama T, Fukui T (1982) Solar heating in closed plastic house for control of soil borne diseases. Application for control of Fusarium wilt of strawberry. Ann Phytopathol Soc Japan... 

For example - solar heat means houses with new designs and new structures ... 

Polycarbonates and polycarbonate polyester copolymers are used for glazing, sealed beam headlights, door seals, popcorn cookers, solar heat collectors, and appliance housings. 

Glass-reinforced SMA polymers are used as electrical connectors, consoles, top pads, and as supports for urethane-padded instrument panels. There are seveial additional automotive uses. SMA aie also found in coffee makers, steam curlers, power tools, audio cassette components, business machines, vacuum cleaners, solar heat collectors, electrical housing, and fan blades, among others. 

SOLUTION The passive solar heating of a house through a Trombe wall is considered. The temperature distribution in the wall in 12-h intervals and the amount of heat transfer during the first and second days are to be determined. Assumptions 1 Heat transfer is one-dimensional since the exposed surface of the wall is large relative to its thickness. 2 thermal conductivity is constant. 3 The heat transfer coefficients are constant. 

A house located in Boulder, Colorado (40° N latitude), lias ordinary double-pane windows with 6-mm-ihick glasses and the total window areas are 8, 6,6, and 4 m on the south, west, east, and itorth walls, respectively. Determine the total solar heat gain of the house at 9 00, 12 ()0, and 15 00 so lar lime in July. Also, determine the total amount of solar heat gain per day for an average day in January. 

In some solar-heated homes, heat from the sun is stored in rocks during the day and then released during the cooler night, (a) Calculate the amount of heat required to raise the temperature of 78.7 kg of rocks from 25.0°C to 43.0°C. Assume that the rocks are limestone, which is essentially pure calcium carbonate. The specific heat of calcium carbonate is 0.818 J/g-°C. (b) Suppose that when the rocks in part (a) cool to 30.0°C, all the heat released goes to warm the 10,000 ft (2.83 X 10 L) of air in the house, originally at 10.0°C. To what final temperamre would the air be heated The specific heat of air is 1.004 J/g-°C, and its density is 1.20 X 10 g/mL. 

If the solar system is less ambitious and designed to provide only part of the heat, the cost of the solar collecting system is less. In this case, the cost of the solar harvesting system must be added to the cost a second heating plant to heat the house when solar heat is inadequate. With the combined costs of solar and conventional heating systems, the dual system requires 15 to 20 years for the savings in conventional fuel costs to equal the cost of the solar collectors. Because of the complexity, maintenance problems and costs there is little incentive to install solar heating in homes. 

In the deep south of the United States, swimming pools are often solar heated. Plastic pipe collectors are in common use. Rows of black plastic pipes are laid on the south-facing roof of the house. The pipes are plumbed so that the pool pump can circulate some of the pool water through the pipes. The black pipes adsorb the solar heat and warm the water. In Florida a well-engineered system allows the use of pool a month or so earlier in the spring and a similar time later in the fall. Few solar systems are capable of heating the pool to a satisfactory temperature all year round. People who like to swim all year round use gas, oil or electric heat pump heaters in addition to their solar heaters. 

Figure 8 Passive solar heating with a translucent aerogel insulation in front of a blackened house wall. Even on cold but sunny days heat gain can be achieved.

Thermal Envelope Houses - An architectural design (also known as the double envelope house), sometimes called a "house-within-a-house," that employs a double envelope with a continuous airspace of at least 6 to 12 inches on the north wall, south wall, roof, and floor, achieved by building inner and outer walls, a crawl space or subbasement below the floor, and a shallow attic space below the weather roof. The east and west walls are single, conventional walls. A buffer zone of solar-heated, circulating air warms the inner envelope of the house. The south-facing airspace may double as a sunspace or greenhouse. 

The absorber may be a solid (e.g., concrete) wall with a black coating. In the case of solar dryers, this solution is justified if the wall is the dryer housing wall. Its operating principle is the same as that of the Trombe wall used in passive solar heating [56]. (For collector-integrated solar water heaters, see Refs. [105,108].)... 

Active solar heating is more efficient and involves a liquid circulating through tubes. The tubes are typically encased in a box under glass and mounted on a roof. As the liquid is heated, it circulates through the pipes to heat water or the entire house (see Figure 9-5). 

Hoare RA, Popplewell KB, House DA, Henderson RA, Prebble WM, Wilson AT (1965) Solar heating of Lake Fryxell, a permanently ice covered Antarctica lake. J Geophys Res 70 1555-1558... 

Solar Ion Energy Houses of lEA Task 13, Report of the International Energy Agency, Solar Heating and Cooling Programme, Robert Hastrup ed. (James and James (Science Publishers) Ltd. London, January 1995. 

Titanium dioxide is extensively used for both house paint and artist s paint, because it is permanent and has good covering power. Titanium oxide pigment accounts for the largest use of the element. Titanium paint is an excellent reflector of infrared, and is extensively used in solar observatories where heat causes poor seeing conditions. 

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