high pressurized solar water heater SHPTS

Specifications and Product Details:

Technology:

Model Type	SHHPC
Manifold casing material	Aluminum painted un-oxygen layer
Frame material	(Aluminum or Stainless Steel or Galvanized Steel) and painted Layer
Header pipe material	Copper
Heat pipe material	Copper
Insulation	Polyurethane 55mm or Glass-reinforced polyester
Rubber seals and rings	UV stabilized high temperature silicon rubber
Test pressure	9 bar
Collector mounting	Plane roof/slope roof
Angle of operation	10-80
Inlet Outlet	Φ22 or 3/4 inch male

Specifications:

MODEL	Ligthing (m²)	Heat pipe			Supply hot water(L/ )	20/40" container	GW KG
		Heat pipe
		diameter	length	No.
SHHPC47/12	1.26	Φ47mm	1500mm	12	70/60	133/276	28
SHHPC 47/18	1.80			18	110/60	120/249	42
SHHPC 47/20	2.10			20	125/60	110/227	46
SHHPC 47/30	3.15			30	180/60	76/158	69
SHHPC 58/12	1.73	Φ58mm	1800mm	12	110/60	118/244	40
SHHPC 58/18	2.57			18	150/60	84/175	60
SHHPC 58/20	2.88			20	175/60	77/160	64
SHHPC 58/30	4.32			30	260/60	52/106	98

Collector efficiency :

Solar water heater performance is often presented as a graph, or set of three performance variables. Values may be provided based on gross area, aperture area or absorber area. In Europe, aperture or absorber is often used, in the US, gross area is often used. It doesn't really matter which values is used, as long as you use the correct value. ie. Don't use absorber area when using performance values based on gross area

The three performance variables for the Sunhome collector as follows:

Conversion Factor: η0 = 0.717

Loss Coefficient: a1 = 1.52 W/(m2K)

Loss Coefficient: a2 = 0.0085 W/(m2K2)

The equation for calcaulating basic effieiency is:

η(x)=η0-a1*(x)-a2*G(x)² [x=(Tm-Ta)/G]

( Tm=average manifold temperatue,Ta=ambient temperature, insolation level (G) in Watts/m )

Eg. At 2:00pm, the ambient temperature is 25o C (77o F), and the average water temp [(Tin +Tex )/2] is 50o C (122o F). The insolation level is 800Watts/m2 (252Btu/ft2 ).

x = (50-25)/800 = 0.03125

Now enter all the values into the formula:

η(x) = 0.717 - (1.52*0.03125) - (0.0085*800*0.031252 )

=0.717 - 0.0475 - 0.0066

=0.663

The solar conversion efficiency for that specific point in time and set of environmental conditions is 66.3%. That is: 66.3% of the energy provided by the sun is actually used to heat the water.

Based on the assumption that those three environmental factors (G, Tm and Ta) are stable for a period of one hour, then 800 x 0.663 = 530.4 Watts of energy per m2 of absorber area will be used to heat the water (168Btu/ft2 )

530.4Watts is equivalent to 456kcal, which could heat 100L of water by 4.56o C (20 Gallons by 10.9o F)

Below is a graph showing the performance curves for the solar collector at three different insolation levels, from 0 to 80o C Delta-T. In most cases the Delta-T values will be in the range of 20-50o C, with higher values present for high temperature heating such a for absorption cooling applications, or during very cold weather. As can be seen conversion efficiency is highly dependent on solar insolation levels, with higher insolation yielding greater levels of solar conversion.

In reality ambient temperature will fluctuate, and the manifold temperature will gradually increase as the water is heated. Furthermore insolation levels may fluctuate with intermittent cloud cover. In order to more accurately calculate energy output per day/month/year a more complete set of environmental data must be considered and many (hourly) performance calculations throughout the day taken. Your local distributor can provide estimates of average monthly and annual performance, heat output and thus solar contribution for your location.