Solar heat harnessing system

A solar thermal system, comprising a solar thermal collector which comprises:

• an absorbing body, made of a metal plate having one main surface on which a selective absorption film with a large absorptance of solar light and a small emissivity of infrared rays is formed, and the other main surface which is made a black body;
• a heat insulation case almost in the shape of a box, to which the absorbing body is fitted with the other main surface side down;
• a steam generating chamber formed between the heat insulation case and the absorbing body;
• a droplet supply means to supply droplets into the steam generating chamber;
• and
• a transport system whereby steam generated in the steam generating chamber is transported outside the system;
• wherein the transport resistance of the transport system is set so that the steam pressure within the steam generating chamber can be kept almost 1 atmospheric pressure.

A solar thermal system, comprising:

• a solar thermal collector which comprises,
• an absorbing body, made of a metal plate having one main surface on which a selective absorption film with a large absorptance of solar light and a small emissivity of infrared rays is formed, and the other main surface which is made a black body,
• a heat insulation case almost in the shape of a box, to which the absorbing body is fitted with the other main surface side down,
• a steam generating chamber formed between the heat insulation case and the absorbing body,
• a droplet supply means to supply droplets into the steam generating chamber, and
• a transport system whereby steam generated in the steam generating chamber is transported outside the system,
• wherein the transport resistance of the transport system is set so that the steam pressure within the steam generating chamber can be kept almost 1 atmospheric pressure;
• a steam storage means, being connected through the transport system of the solar thermal collector, with an opening open to the atmosphere in the lower portion and a steam storage portion in the upper portion;
• a heat-using means such as a heat exchanger and/or a power-using means such as a steam turbine, being connected through a steam piping to the steam storage means;
• and
• a discharge means to discharge a gas such as steam introduced to the heat-using means and the steam piping.

A solar thermal system, comprising:

• a solar thermal collector which comprises,
• an absorbing body, made of a metal plate having one main surface on which a selective absorption film with a large absorptance of solar light and a small emissivity of infrared rays is formed, and the other main surface which is made a black body,
• a heat insulation case almost in the shape of a box, to which the absorbing body is fitted with the other main surface side down,
• a steam generating chamber formed between the heat insulation case and the absorbing body,
• a droplet supply means to supply droplets into the steam generating chamber, and
• a transport system whereby steam generated in the steam generating chamber is transported outside the system,
• wherein the transport resistance of the transport system is set so that the steam pressure within the steam generating chamber can be kept almost 1 atmospheric pressure;
• a steam storage means, being connected through the transport system of the solar thermal collector, with an opening open to the atmosphere in the lower portion and a steam storage portion in the upper portion;
• a heat-using means such as a heat exchanger and/or a power-using means such as a steam turbine, being connected through a steam piping to the steam storage means;
• a discharge means to discharge a gas such as steam introduced to the heat-using means and the steam piping;
• and
• an outside-air intake regulator.