Numerical Investigation of Thermal Performances of an Evacuated Tube Solar Collector

This research designs a solar evacuated tube collector (ETC) arrangement to meet the low intensity thermal energy requirement. The structure's number of parallel tubes is chosen based on the necessary mass flow rate and pressure drop. The number of arrangements can be coupled in series to get a higher goal temperature. Ten tubes make up the evacuated tube setup used in our investigation. Borosilicate glass makes up the outside tube, while copper plated in black makes up the inside tube. There is a vacuum in the area between the inner and outer tubes. The tilt angles at which the solar radiation strikes the setup are 𝜷=𝝋+𝟏𝟓ᵒ, 𝜷=𝝋 and 𝜷=𝝋−𝟏𝟓ᵒ, Maximum solar radiation measured at 𝜷=𝝋+𝟏𝟓ᵒ is 6.15 MJ/m2, while in the same month, it is 3.83 MJ/m2 at 𝜷=𝝋−𝟏𝟓 and 4.12 MJ/m2 at 𝜷=𝝋. It is also possible to calculate the maximum useable energy accounting for thermal losses at different times of the year. The maximum values are observed to be the 6.56 kJ/s in the summer (May -June – July), 4.58 kJ/s in the rainy season from the first of September to November, and 3.35 kJ/s in the December.