ActiveSolarWaterHeatingforHomeHotWater：家用热水的主动式太阳能热水.ppt

1、Active Solar Water Heating for Home Hot Water,Taylor D. Miles H. APES 3rd 4/06/10,http:/,What is the main goal of active solar heating,They are environmentally friendly Helps save the earths energy resources It is the best choice for people who have allergies,To use a little energy while saving mone

2、y You can save between 50%- 80% on your current heating bill Going solar is an excellent start for reducing energy as well as to saving the planet,What is its overall potential in “making a difference” into the world,Versatility in almost any climate Can reduce dependence on imported fossil fuels, e

3、specially from OPEC Has little environmental impacts; only requires energy from the sun against a solar panel/cell effectively placed on the roof of a house for the best energy collection. Can give way to new jobs in the production of different types of solar water heating systems. Very long lasting

4、 and reduces costs in the long run,How does it work,There is five main components of an active solar water heater. They are the collectors, storage tanks, backup heating system, circulation system, and control system Most of the solar water heaters require a well-insulated tank. This two-tank system

5、s preheats the water before it enters the conventional water heater. The collector is constructed with an Al box into an all copper absorber plate, then a low-iron tempered glass to cover the plate is added to create a greenhouse affect that can deliver high temperatures,There are 3 different types

6、of solar collectors for residential applications: Flat-plate collector Integral collector- storage systems Evacuated-tube solar collectors Then there is two types of active solar heating systems: Direct circulation systems Indirect circulation systems,.uk/Resource/Img/264789/00

7、76236.jpg,Flat-plate collector,/resources/sustainability/green_buildings/images/closed_loop_hot_water_diagram.gif,http:/,Technological Obstacles,The start out cost vary from $4,000 to $8,000 this depends on the following: Size of family to be served Size and brand of solar syst

8、em Type of roof Building codes Orientation of panels Its not always sunny. Cold weather,What political/economical obstacles might disrupt/stall mass implementation,The current recession itself prevents most purchases of solar water heating systems; plus the start-up costs to implement them in a home

9、 are high, which almost nullifies any tax breaks put toward it. Low consumer confidence cripples any thought of purchasing them. There is also a lack of subsidies; more of those go toward fossil fuels. There is little public awareness of solar water heating in homes as well,What are some of the nega

10、tive environmental impacts with this technology,There are almost no negative environmental impacts from this system; all it requires is the sunlight from the sun to hit the solar cells that convert that energy to heat so theres hot water. However, solar water heating itself cannot stand alone. It is

11、 recommended that there is a back-up conventional heating system in place in case the system malfunctions or breaks down. There is also a low net energy yield for it; since it is preheated and put into a tank/canister, this has a chance to cool off, so its best used in the early afternoon/evening,Solar Water Heater v. Standard Water Heater,Biography,http:/ /your_home/water_heating/index.cfm/mytopic=1285