A solar energy powered Stirling duplex cooler is presented which includes a Stirling engine and a Stirling cooler. The Stirling engine drives the Stirling cooler to produce cold temperatures for refrigeration or air conditioning. The Stirling duplex cooler includes a solar concentrator to focus high temperature solar radiation upon the Stirling engine expansion space. The Stirling duplex cooler further includes a thermal storage tank to receive and store heat rejected from the cooler expansion space. This stored heat is used to operate the cooler at night. A flywheel connected operatively to engine and cooler expansion space pistons and a crankshaft connected operatively to engine and cooler compression space pistons actuate the pistons to move a working fluid between the expansion and compression spaces.

A solar energy powered Stirling duplex cooler is presented which includes a Stirling engine and a Stirling cooler. The Stirling engine drives the Stirling cooler to produce cold temperatures for refrigeration or air conditioning. The Stirling duplex cooler includes a solar concentrator to focus high temperature solar radiation upon the Stirling engine expansion space. The Stirling duplex cooler further includes a thermal storage tank to receive and store heat rejected from the cooler expansion space. This stored heat is used to operate the cooler at night. A flywheel connected operatively to engine and cooler expansion space pistons and a crankshaft connected operatively to engine and cooler compression space pistons actuate the pistons to move a working fluid between the expansion and compression spaces.

A solar energy powered Stirling duplex cooler is presented which includes a Stirling engine and a Stirling cooler. The Stirling engine drives the Stirling cooler to produce cold temperatures for refrigeration or air conditioning. The Stirling duplex cooler includes a solar concentrator to focus high temperature solar radiation upon the Stirling engine expansion space. The Stirling duplex cooler further includes a thermal storage tank to receive and store heat rejected from the cooler expansion space. This stored heat is used to operate the cooler at night. A flywheel connected operatively to engine and cooler expansion space pistons and a crankshaft connected operatively to engine and cooler compression space pistons actuate the pistons to move a working fluid between the expansion and compression spaces.

A solar energy utilization device, comprising a light energy utilization device and at least one liquid light condensing device. The liquid light condensing device is filled with a transparent liquid. The liquid light condensing device has at least one photoreceptor capable of transmitting sunlight into the transparent liquid and a reflector that reflects incident sunlight. In the liquid light condensing device, the sunlight that is reflected by the reflector and then transmitted to the photoreceptor from the transparent liquid forms a total reflection phenomenon, such that the sunlight is prevented from being refracted from the photoreceptor after being reflected by the reflector into the transparent liquid. Thus more sunlight is condensed onto a light energy utilization part of the light energy utilization device, thereby improving the light condensing efficiency.

A solar energy powered Stirling duplex cooler is presented which includes a Stirling engine and a Stirling cooler. The Stirling engine drives the Stirling cooler to produce cold temperatures for refrigeration or air conditioning. The Stirling duplex cooler includes a solar concentrator to focus high temperature solar radiation upon the Stirling engine expansion space. The Stirling duplex cooler further includes a thermal storage tank to receive and store heat rejected from the cooler expansion space. This stored heat is used to operate the cooler at night. A flywheel connected operatively to engine and cooler expansion space pistons and a crankshaft connected operatively to engine and cooler compression space pistons actuate the pistons to move a working fluid between the expansion and compression spaces.

The present disclosure relates to a device that includes a reflecting surface having a length aligned along a first axis (z), where a cross-section of the reflecting surface in a plane perpendicular to the first axis (z) forms a curve comprising a concave section positioned between a first endpoint and a second endpoint, at least a portion of the concave section is accurately approximated by a polynomial equation, an aperture is formed by a straight line connecting the first endpoint to the second endpoint, and the concave section is configured to focus a plurality of beams of light passing through the aperture onto a focal point.

Elliptical cylinder collector for thermal solar energy comprising a first pipe and a reflector surface, which also comprises a second pipe and a third pipe, wherein the reflector surface has a generatrix which is half an ellipse and wherein the second pipe and the third pipe are located at focal points of the ellipse and the first pipe is located on a minor axis of the ellipse at a greater distance from the reflector surface than the second pipe and the third pipe, the first pipe is also located at the focal point of an imaginary parabola whose vertex is located at the negative end of the minor axis of the ellipse.

The present disclosure relates to a device that includes a reflecting surface having a length aligned along a first axis (z), where a cross-section of the reflecting surface in a plane perpendicular to the first axis (z) forms a curve comprising a concave section positioned between a first endpoint and a second endpoint, at least a portion of the concave section is accurately approximated by a polynomial equation, an aperture is formed by a straight line connecting the first endpoint to the second endpoint, and the concave section is configured to focus a plurality of beams of light passing through the aperture onto a focal point.

A solar energy utilization device, comprising a light energy utilization device (200) and a convex light concentrating device (100). The convex light concentrating device (100) is filled with a transparent liquid (130). The convex light concentrating device (100) has a light-transmissive convex sidewall (110) provided obliquely, and sunlight can be transmitted to the transparent liquid (130) from the light-transmissive convex sidewall (110). A first light energy utilization part (210) is provided at the bottom of an accommodating cavity, and sunlight transmitted from the transparent liquid (130) to the light-transmissive convex sidewall (110) forms a total internal reflection phenomenon, so that the convex light concentrating device (100) more conveniently concentrates the sunlight onto the first light energy utilization part (210).

Elliptical cylinder collector for thermal solar energy comprising a first pipe and a reflector surface, which also comprises a second pipe and a third pipe, wherein the reflector surface has a generatrix which is half an ellipse and wherein the second pipe and the third pipe are located at focal points of the ellipse and the first pipe is located on a minor axis of the ellipse at a greater distance from the reflector surface than the second pipe and the third pipe, the first pipe is also located at the focal point of an imaginary parabola whose vertex is located at the negative end of the minor axis of the ellipse.