COLLECTION OF DUST ON EVACUATED TUBE COLLECTOR

Why Collect dust on evacuated tube collector?

(13/02/2022)

PROBLEM : Effect of dust on the ability to heat water.

1) A = Solar water heater on Meditation hall (13/02/2022)

We know ,

Wt. of filter paper 1= P1=2.78gm

Wt. of filter paper 1 with dust = 4.51gm

Wt. of dust on 10 pipes of A= 4.51 – P1 = 4.51 – 2.78 = 1.73gm

Therefore,

Wt. of dust on A solar water heater = (1.73*32) / 10 =5.53gm

2) B = Solar water heater on Boys hostel (14/02/2022)

We know

Wt. of filter paper 2= P2 = 2.98gm

Wt. of filter paper 2 with dust = 3.93gm

Wt. of dust on 5 pipes of B = 3.93 – P2 = 3.93 – 2.89 = 1.04

Therefore,

Wt. of dust on B solar water heater = (1.04*32) / 5 = 6.65gm

3) C =Solar water heater on DBRT boys hostel (16/02/2022)

Wt. of filter paper 3=P3=1.31gm

Wt. of filter paper 3 with dust =2.16gm

Wt. of dust on 5 pipes C = 2.16 – P3 =2.16 – 1.31 = 0.85gm

Therefore,

Wt. of dust on C solar water heater = (0.85*32) / 5 = 5.44gm

4) D = Solar water heater in Technopark (17/02/20227)

we know,

Wt. of filter paper 4=P4=1.33gm

Wt. of filter paper 4 with dust=2.31gm

Wt. of dust on 5 pipes of D= 2.32 – P4 = 2.31 – 1.33 = 0.98gm

Therefore,

Wt. of dust on D solar water heater = (0.98*32) / 5 = 6.27gm

RESULT:

Your solar water heater will perform optimally if it is cleaned regularly. When a dust accumulates on solar collector their efficiency reduced very speedily as temperature increases due to decreasing of the solar irradiation that absorbed by the solar collector.