The Cyprus Institute - FRESNEL Solar Assisted Heating and Cooling in the Built Environment

Описание: Linear Fresnel Solar Energy System

#TheCyprusInstitute #CyI #Fresnel

The system was built by utilising financing provided by the ‘Small Scale Thermal District Units for Mediterranean Communities’ (STS-Med) project, a consortium of 14 organisations from 6 different countries including academic institutions, businesses and governmental departments. The system installed in Cyprus is one of the four pilot systems that were built in the Eastern Mediterranean region, with the other situated in Italy, Egypt and Jordan. The 4 demonstrative plants based on Concentrating Solar (CS) power target on serving the energy demand of 20.000 end users coming from 20 Mediterranean local communities for a total power of 400 kW. This project is funded by the European Union and is implemented by Arca Consortium.

The system collects solar energy through several rows of mirrors that continuously track the sun's path and channel the collected heat to a cooling device for the needs of the NTL, which is now classified as a ‘Nearly Zero Energy Building' (NZEB), which is the first of its kind in Cyprus. The mode of integration of the solar system in the existing facilities is also novelty of the CyI.

Characteristics of the Fresnel collector at the CyI are:

Location: KEPA school, opposite the NTL building

Technology: solar concentration, tracking on single axis the direct sun light with rows of parallel mirrors and reflecting it on a smaller area (tube receiver)

Objective in summer: produces heat to fire an absorption chiller to cool the NTL building,

Objective in winter: produces heat to support the HVAC system of the NTL,

Power: Up to 70kW thermal,

Operation: reflects the direct radiation from the sun on a vacuum tube receiver and transfers to thermal oil (up to 200°C),

Reflective area: 184m2, 18 parallel rows of 8 single mirrors in series,

Single mirror area: 320 mm X 4000 mm, focusing distance from 7m to 9m,

Receiver : 3.5m high (from roof level), 32 m long, secondary reflector (70 % efficient),

Drives: 72 DC motors, 4 per row, controlling the rotation of two mirrors each by a PLC controller.