A solar air heating system comprises a solar collector. The collector comprises a front glazing and a perforated absorber behind the glazing. A front plenum is defined between the front glazing and the absorber. A back plenum is defined between the absorber and a back wall. The front and back plenums are fluidly connected through the perforated absorber. A flow separator divides the back plenum into an inlet chamber and an outlet chamber. The inlet and outlet chambers are fluidly connected via the front plenum. The inlet chamber has an air inlet. The outlet chamber has an air outlet. The front plenum has a smaller air exchange interface with the inlet chamber than with the outlet chamber so that a temperature gain is greater when the air flows from the front plenum to the outlet chamber than when the air flows from the inlet chamber to the front plenum.

A multiple flow channel full contact fin heat exchange mechanism includes a heat concentration unit and a heat transfer assembly. The heat concentration unit is arranged at a focusing position of a soler energy reflection heat-concentration device. The heat transfer assembly is arranged on the heat concentration unit. Multiple groups of heat exchange flow channels are formed between the heat transfer assembly and the heat concentration unit. Two adjacent groups of heat exchange flow channels are connected in sequence. All of the heat exchange flow channels are arranged parallel in a linear direction. By having the multiple groups of heat exchange flow channels arranged between the heat transfer assembly and the heat concentration unit and two adjacent groups of heat exchange flow channels connected in sequence and arranged in parallel in a linear direction, fluid flowing in the heat exchange flow channels directly contacts the heat transfer assembly.

A multiple flow channel full contact fin heat exchange mechanism includes a heat concentration unit and a heat transfer assembly. The heat concentration unit is arranged at a focusing position of a soler energy reflection heat-concentration device. The heat transfer assembly is arranged on the heat concentration unit. Multiple groups of heat exchange flow channels are formed between the heat transfer assembly and the heat concentration unit. Two adjacent groups of heat exchange flow channels are connected in sequence. All of the heat exchange flow channels are arranged parallel in a linear direction. By having the multiple groups of heat exchange flow channels arranged between the heat transfer assembly and the heat concentration unit and two adjacent groups of heat exchange flow channels connected in sequence and arranged in parallel in a linear direction, fluid flowing in the heat exchange flow channels directly contacts the heat transfer assembly.

The present invention discloses a receiver for a concentrated thermal system. The thermal system includes a first heat exchange element helically coiled to receive a solar radiation from a first reflector and the second heat exchange element. Further, the first heat exchange element includes a first end and a second end to enable circulation of a heat exchange fluid in the first heat exchange element. The second heat exchange element being a helically coiled element is extending from and fluidically connected to the first end of the first heat exchange element. Further, the second heat exchange element is configured to receive absorb a part of solar radiation to preheat the heat exchange fluid flowing therein.

The present invention discloses a receiver for a concentrated thermal system. The thermal system includes a first heat exchange element helically coiled to receive a solar radiation from a first reflector and the second heat exchange element. Further, the first heat exchange element includes a first end and a second end to enable circulation of a heat exchange fluid in the first heat exchange element. The second heat exchange element being a helically coiled element is extending from and fluidically connected to the first end of the first heat exchange element. Further, the second heat exchange element is configured to receive absorb a part of solar radiation to preheat the heat exchange fluid flowing therein.

A solar receiver for converting solar radiation into thermal energy. The solar receiver includes a heat-absorbing solid body, a fluid system to provide a flow of working fluid proximate to the heat-absorbing solid body, and a movement device to move the heat-absorbing solid body such that one or more surfaces of the heat-absorbing solid body are periodically exposed to incident solar radiation. The incident solar radiation heats a portion of the heat-absorbing solid body which in turn heats the working fluid. The at least a portion of the heat-absorbing solid body is configured to promote absorption of incident solar radiation, promote transfer of heat from the at least a portion of the heat-absorbing solid body to the working fluid, promote cooling of the at least a portion of the heat-absorbing solid body, or promote any combination thereof.

A solar receiver for converting solar radiation into thermal energy. The solar receiver includes a heat-absorbing solid body, a fluid system to provide a flow of working fluid proximate to the heat-absorbing solid body, and a movement device to move the heat-absorbing solid body such that one or more surfaces of the heat-absorbing solid body are periodically exposed to incident solar radiation. The incident solar radiation heats a portion of the heat-absorbing solid body which in turn heats the working fluid. The at least a portion of the heat-absorbing solid body is configured to promote absorption of incident solar radiation, promote transfer of heat from the at least a portion of the heat-absorbing solid body to the working fluid, promote cooling of the at least a portion of the heat-absorbing solid body, or promote any combination thereof.