Using solar energy for your business is a cost-effective way to dramatically reduce or eliminate your monthly energy bills. Whether you use solar energy to generate your own solar hot water, use solar heating or cooling, or use solar photovoltaic systems to generate your own electricity, solar energy is ideal for any business - regardless of size. Here we talk about solar water heating firstly.
Our client, located in south of Portugal, is a builder of residential houses, apartments or villas. They are looking for a partner who offers an economical solution for the realization of a project of houses equipped with solar water heater.
a) Domestic hot water (+/- 80lt / day)
b) Underground heating (+/- 130m²) available in January - February - March - November and December
c) Basement swimming pool (48m³ of water – 25°Celsius) available in March - April - May - October – November.
This project is located in south of Portugal. Here we use the meteorological data of Lagos as the design basis.
This system needs to provide 80L hot water for shower throughout the year. In summer time, solar collectors to heat pool and in winter months, solar collectors turn to heat floor in the house.
According to sun insolation in Lagos, we are going to design a system with four 30-tube collectors and a 300L water tank. System specification is below.
three-way solenoid valve
Air vent valve
Hot ball valve
Connectors between collectors
This is an automatic control system, at any time of within the year, solar collectors preferentially heat the tank. We can set the maximum water temperature of the tank to 60 degrees Celsius (temperature can be set by the controller according to customer request) these hot water meet demand of one household
During March - April - May - October - November, When the water tank temperature reaches for example 60 ° C. R4 automatically switches to heat the pool.
During January - February - March - November and December, When the water tank temperature reaches for example 60 ° C, R4 automatically switches to the heat underground floor.
If there is no sunlight, excess hot water stored in the tank also can be used to heat the underground by switching on R5
The pool heating mode and the floor heating mode can be switched via a manual three-way ball valve and you only need to turn 90 degrees when you need to switch it on every year.
This is the best solution and each part does their best to reach the best efficiency throughout the year.
Warranty and Maintenance
The customer is very satisfied with the design of the whole system. Because the system meets the customer's needs, and solves the customer's concerns with reasonable prices.
However, as a real estate agent, he is responsible for all the houses he sells. Therefore, he is very interested in the warranty and routine maintenance of solar water heaters.
Solar collector: 5 years; Tank: 3 years; Spare parts: 1 year
Since most of the houses sold by customers are located in southern Portugal, where there are plenty of sunshine and warm weather all year round, collectors are best suited to work in such climates and are basically maintenance-free. The only thing that installers need to pay attention to is to put solar collectors in an open place in case of being blocked by other obstacles, affecting its work efficiency.
The benefits of solar water heating are numerous and considerable. First, you're going to save money on your electric bill. Then there is the corresponding reduction in pollution. Because of the benefits of solar water heating, adding a unit to your home will also increase its value. So you could end up getting back whatever money you put into a solar heating system when you sell your house.