Solar hot water system

Intro to solar water heaters

A solar water heating system is a device that uses the sun’s rays to heat water for domestic, commercial, and other needs. It is the most common application of solar energy in the world to heat water. With a solar water heating system, you can save up to 1440 units of electricity per year for every 200 liters of a solar water heater.

S.No           Item                   Material                Diameter         Thickness              Process

1         Inner Tank                        GI                           380 mm               1.5 mm                 CO2 welding

2  Inner Tank Side Cover          GI                          380 mm                1.5 mm

3      Glass Coating                                                                                          1

4  Outer Tank Precoated            GI                         480 mm                  0.45                 Hemming And Seaming

5      Outer Side Cover                GPSP                   480 mm                     0.35                Forming-Powder Coated

6          Puff                                  46 Grade                                                    50                         Injection Filling

7    Inlet Connector                       GI                           3/4”                                                        CO2 welding

8   Outlet Connector                    GI                            3/4”                                                      CO2 welding

9    backup socket                         GI                           1 1/4”                                                     CO2 welding

10  Silicon Ring                          Silicon                    58 mm OD  

11   Dust Ring                               EPDM                   58 mm OD

12  Connector Dust Ring            EPDM                          3/4”

13  ETC Tube 58X1800          Three Targeted         58 mm OD                 1.6     Type-Three Targeted Coating-AL-SS-CU

15    Polythene Bag                       polythene                                                                                 50 micron

16    Safety Cap for threading       HDPE                       3/4”

17 Corrogated Box                                                                                                                           Boxes-180 GSM 5 ply

How a solar water heater works

  • Generally, the system is installed on a roof or open ground, with the collector facing the sun and connected to a continuous water supply.
  • Sunlight heats the water, which then flows through tubes.
  • For later use, it is stored in tanks.
  • Since the storage tank is insulated and heat losses are minimal, the water in the tank stays hot overnight.

Uses of solar water heater

  • In homes, SWHs can be used to produce hot water for bathing, cleaning, and washing. Solar water heaters (SWHs) with capacities of 200, 300, 500 liters are suitable for domestic and commercial use. 
  • SWHs with a capacity of 200 liters can replace an electric geyser for residential use and save 1400 units of electricity annually.
  • The use of 1000 SWHs of 200-liter capacity each can save 1 MW in peak load costs.
  • An SWH of 200 liters capacity can prevent the emission of 1.5 tonnes of carbon dioxide each year so it is environmentally friendly.
  • SWHs have a life expectancy of 15-20 years. Replaced electricity pays back in 3-4 years.

What is the cost of installing a solar water heater?

The total cost of a solar water heating system is dependent upon many things. Among these factors are the capacity, the backup system used, the material of the inner and outer tanks, the length of the distribution piping needed to supply hot water to the bathrooms, etc.

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