Solar heat collector

A solar heat collector comprising:

• a reflective mirror group including a single-axial tracking solar type reflective mirror group and a dual-axial tracking solar type reflective mirror group;
• a heat collector configured to collect light from the reflective mirror group to obtain heat;
• and
• a heating medium is caused to move from a first end of the heat collector on an upstream to a second end on an opposite side on a downstream,
• wherein the heat collector comprises a continuous heating medium flow passage including a combination of a first heat collection pipe and a second heat collection pipe, wherein:
• the first heat collection pipe having a small amount of heat collection per unit area,
• the second heat collection pipe having an amount of heat collection per unit area larger than the first heat collection pipe,
• the first heat collection pipe and the second heat collection pipe have a double-pipe structure including an inner metal pipe, a glass pipe, and a vacuum space, the heating medium flowing through the metal pipe, the glass pipe being disposed outside the metal pipe, the vacuum space being disposed between the metal pipe and the glass pipe,
• the first heat collection pipe is disposed on the upstream, the second heat collection pipe being disposed on the downstream with respect to the first heat collection pipe, the first heat collection pipe being coupled to the second heat collection pipe by at least a transport pipe for the heating medium,
• the first heat collection pipe only receives reflected light from the single-axial tracking solar type reflective mirror group to collect heat, and
• the second heat collection pipe receives reflected light from both the single-axial tracking solar type reflective mirror group and the dual-axial tracking solar type reflective mirror group to collect heat.