Solar heat collecting system

Abstract

A solar heat collecting system includes a collecting mirror, a receiver, an electrical control unit for controlling the collecting mirror to track the sun, a projection mirror disposed coaxially and integrally with the collecting mirror and the focus of which is coincident with that of the collecting mirror, a through hole disposed at the collecting mirror and the size of which is larger than that of the light spot of the projection mirror and far smaller than the through hole of the collecting mirror, and a reflecting mirror disposed at the side of the collecting mirror opposite to the projection mirror. The receiver is fixedly disposed at the extending direction of the primary optical axis line of the reflecting mirror. A first motor, disposed at the primary optical axis line for driving the whole mirror assembly, is connected to the electrical control unit and runs under control thereof.

1 . An FPR solar heat collecting system, comprising a collecting mirror tracking the sun in real time, a receiver for receiving heat and storing energy, and an electrical control unit for controlling the collecting mirror to track the sun;
 wherein the heliostat solar heat collecting system is further provided with a projection mirror that is disposed coaxially and integrally with the collecting mirror and the focus of which is coincident with that of the collecting mirror, a through hole not interfering with the light spot of the collecting mirror and far smaller than the surface of the collecting mirror is disposed at the center of the collecting mirror; and a reflecting mirror is disposed at the side of the collecting mirror opposite to the projection mirror, the reflecting mirror, the collecting mirror, and the projection mirror form a mirror assembly, a receiver is fixedly disposed at the extending direction of the primary optical axis line of the reflecting mirror, and a first motor is disposed at the primary optical axis line for driving the whole mirror assembly to rotate around the center of the reflecting mirror, wherein the first motor is connected to the electrical control unit and runs under control thereof.   
     
     
         2 . The FPR solar heat collecting system according to  claim 1 , wherein the mirror assembly for heat collection is mounted on a gyro gimbal, and the heliostat solar heat collecting system is further provided with a collecting mirror angle adjusting assembly axially vertical with the rotation axis of the mirror assembly, comprising a second motor traction rod and a clump weight whose torques are offset relative to the reflection center, wherein the second motor traction rod is connected to the backlight surface of the collecting mirror. 
     
     
         3 . The FPR solar heat collecting system according to  claim 1 , wherein the reflecting mirror is a plane mirror. 
     
     
         4 . The FPR solar heat collecting system according to  claim 1 , wherein the reflecting mirror is a ball mirror with a ring concave surface. 
     
     
         5 . The FPR solar heat collecting system according to  claim 1 , wherein the lateral surface of the receiver is coated with heat insulating material. 
     
     
         6 . The FPR solar heat collecting system according to  claim 1 , wherein the shape of the collecting mirror is a paraboloid of revolution having the focusing performance, or a convex mirror in a spherical shape. 
     
     
         7 . The FPR solar heat collecting system according to  claim 1 , wherein the first motor and the second motor are selected from the group consisting of at least one stepping motor and servo motor. 
     
     
         8 . The FPR solar heat collecting system according to  claim 1 , comprising more than one mirror assembly, and their respective electrical control unit;
 wherein the electrical control units are serially or parallelly connected to each other and run synchronously, and the primary optical axis line of the reflecting mirror of the mirror assembly concentrates at the receiver which has a relatively fixed location.