This article discloses a domestic system that allows greater energy efficiency in a home located in Mexico City, which facilitates its contribution to a green urbanism by installing it in the buildings of the City.
The system was designed and built using a solar heater (CalGen) that was installed in a house with four people. Aluminum cans were used in the CalGen as vacuum tubes, the water heated in the cans was used in the shower, in addition the CalGen structure were placed photoelectric cells, which were controlled by an Arduino Uno, in order to increase the efficiency of the solar radiation. The water heated by the CalGen helps to reduce the emissions 3.6 kiolograms (kg) of carbon dioxide (CO2) per day, since before installing the system the house used principally liquefied petroleum gas (LPG) to heat the water. The water circulating inside the aluminum cans is heated by solar radiation, leaving the water at an average temperature of 37.71°C. The eight photoelectric cells generate 240 watts per day (W/day). The electricity generated by the photoelectric cells is stored in rechargeable batteries. The methodology of the tests and construction of CalGen is shown, as well as the changes that were made from the tests. There is also a cost-benefit study that CalGen had in housing.It should promote the design of cities where the environment of the quality of life of human beings is healthier and more sustainable, given that the space of cities is being increasingly demanded. Green buildings should not be an optional trend, but a fundamental requirement, taking advantage of and adapting existing spaces more effectively.