Over the years, which countries invented and built solar houses?

1988, a strange building was built in Japan. This is a six-story building designed by Japanese solar energy expert Mauri. It has no windows, but there is plenty of sunshine inside. Mauri believes that the efficiency of using sunlight in the past was too low. He thinks that sunflowers face the sun from morning till night every day. So, he installed 19 sunflowers on the roof, controlled by computer, always facing the sun; Each room is equipped with an optical cable consisting of 37 optical fibers, and the sunlight collected by the roof is transmitted to the room through the optical cable, and the brightness is equivalent to a 100 watt lamp.

People not only need solar illumination, but also need it to keep warm.

As early as 1882, Professor Morse of the United States invented the solar greenhouse. The wall that can shine on the sun is made of black slate and covered with glass. Sunlight is absorbed by the black slate, which warms the air between the slate and the glass, and the air communicates with the room, which warms the house. This is passive heating.

More than 200 rural areas in Ladakh, India use solar heating walls to supply greenhouse energy. The solar wall is painted black to absorb solar energy. There is a double glass window in front of the wall, and there is a gap between the glass window and the wall. The black wall absorbs solar energy to form a warm current, which enters the hot air collector between the glass and the wall, namely the solar energy storage device. Hot air enters the room through the ventilation holes at the upper end of the wall, and then cold air is supplemented through the ventilation holes at the lower end of the wall. The cost of this solar wall can be recovered within two years.

Active greenhouse is composed of heat collector, heat accumulator, pipeline, fan and water pump. Absorb the heat of the sun and heat the house.

1949, Dr. Turk of Massachusetts Institute of Technology built the Dover Solar House, which was completely heated by solar energy.

By the 1990s, Germany had built a new type of solar house. This is the "energy-free house". The front of the house is all glass, and the windows on the back are as small as possible to reduce heat loss. Solar collectors are installed on the roof, which can heat hot water to keep warm. Huge long-term storage can keep the heat generated by the sun in summer into winter. The photovoltaic energy storage device installed on the roof can input excess current into the power grid. In winter, residents can use the electricity from the external power grid. It can be self-sufficient in energy.

This solar house can automatically adjust the indoor temperature. The heat needed indoors is mainly generated by sunlight shining on the sunny glass. There is a shielding device in front of the front glass, which is controlled by an automatic device (it can also be adjusted manually). This device is used to adjust the heat obtained by the positive electrode. When the weather is very hot, excess heat can be released through the automatic opening window. The outdoor temperature is 37℃ and the indoor temperature is only 28℃, so the temperature exchanger plays the role of air conditioning.