Concentrated solar thermal system

A concentrated solar thermal system comprising:

• a first reflector configured to collect solar radiation;
• and
• a receiver placed at a distance from the first reflector, wherein the first reflector is configured to redirect the collected solar radiation to the receiver wherein the receiver comprises of a first heat exchange element helically coiled to receive solar radiation from a first reflector, wherein the first heat exchange element comprises a first end and a second end to enable circulation of a heat exchange fluid in the first heat exchange element and wherein first heat exchange element helically coiled is configured to define a substantially hemispherical shape forming a cavity;
• and
• a second heat exchange element helically coiled and extend from and fluidically connected to the first end of the first heat exchange element, wherein the second heat exchange element is configured to absorb a part of the solar radiation to preheat the heat exchange fluid circulating therein;
• and
• a hyperboloid reflector to receive a part of the solar radiation and redirect the part of the solar radiation to the first heat exchange element, wherein the second heat exchange element is helically coiled on the hyperboloid reflector wherein the hyperboloid reflector is configured to increase optical efficiency of the receiver by 1.24 times than a receiver without a hyperboloid reflector.