A ton.
There is a calculation formula for the solar heat collection area. Basically, the amount of solar irradiation is different in different regions. The number of solar tubes needed to produce one ton of hot water. slightly different, but because the data gap is not very large, for calculation reasons, the industry generally defaults to 100 solar tubes producing 1 ton of hot water, and the total heat collection area of 100 solar tubes is 16 square meters.
Solar energy is a renewable energy source. It refers to the radiant thermal energy of the sun (see the three modes of propagation of thermal energy: radiation), and its main manifestation is often called solar rays. Nowadays, it is typically used to generate electricity or provide energy for water heaters.
What is the lighting areaof a single tube of all-glass solar collector tube Φ58×1800? What is the difference between effective area and nominal area? Is there a standard base?
Solution: (1) From ρ=
m
v
Obtain:
m=ρv Water = 1×103kg/m3×0.12m3=120kg;
Heat absorbed by water:
Absorption Q=cm△t=4.2×103J/(kg ?℃)×120kg ×(70℃-20℃)=2.52×107J;
(2) The radiant power obtained by this solar water heater:
P= S×1400W/m2;
p>
From P=
W
t
We can get the energy solar obtained by 5 hours of solar radiation:
W total= P also t=S×1400W/m2×5×3600s;
De η=
W a
W total
can obtain:
Q suction = W = W total × 40% = S × 1400W/m2 × 5 × 3600s × 40 %
Collecting surface of the water heater:
S=
Q suction
1400W/m2×5×3600s×40%
=
2.52×107J
1400W/m2×5×3600s×40%
=2.5m2.
Answer: (1) The heat that a can ofwater must absorb is 2.52 × 107J
(2) The surface of the collector on the water heater is at least 2.5m2.
Calculation of solar hot water collection area in Beijing
The national standard includes concepts such as heat collection area, heat absorption area and the sensor area.
Heat absorber Area: Φ58×1800 The area of the heat absorber is 0.260 square meters, which is defined as the area of the inner glass tube. (GB/T17049-"All-glass vacuum solar collection tube")
The nominal name on the product is generally the heat collection area. Heat collection area (contour illumination area): is defined as the maximum amount. solar light projected onto the collector. Effective area, this area is also related to the installation spacing of the vacuum tubes, the length of the vacuum tubes inserted into the water tank (or collector), etc. Generament, the surface area of each The tube measures between 0.12 and 0.14 square meters. (GB/T19141-2003 “Technical conditions for domestic solar hot water systems”)
In the actual design, many use the collector area, which refers to the use of GB/ T50364-2005 “Solar energy application technology”. Hot water systems for civil buildings" The surface of the sensor defined in the "Specifications" refers to the installation area of the sensor.
The lighting area on which you have installed questions does not have this concept in the national standard. The effective area should literally refer to the heat collection area, and the rated heat collection area on the equipment is also the heat collection area. /p>
The proportion of annual investment and fuel cost savings over a defined period of time Solar energy is the electromagnetic radiation emitted by.the sun, which is captured and converted into useful energy. The calculation of hot water collection area is the proportion of annual investment and fuel cost savings over a defined period of time. The area of the heat absorber refers to the area of the inner tube of the vacuum tube. The heat absorber area of each group of heat collectors is the number of vacuum tubes multiplied by the heat absorber area of each vacuum tube. .