Light transporting devices, including light pipe and fibre optic-based types, have emerged as efficient methods for transporting sunlight into interior spaces, offering numerous benefits in energy conservation, lighting quality, and occupant comfort. Collectors play a pivotal role in deciding the efficiency of a light pipe system. Their primary function is to intercept sunlight from various angles, including low angles, and redirect it into light tubes with minimal loss. The geometry of commonly used collectors often fails to redirect the low-altitude light to the pipe aperture. The study proposes a novel methodology for location-specific optimisation of the collector geometry and integrating light redirection elements to improve spatial daylight autonomy (sDA150) and uniformity performance using TracePro software. The study yields significant improvement in sDA150 values, giving comparatively consistent natural lighting during the hours of consideration. However, the light pipe integration to an existing building is complex. Fibre optic-based systems allow for more efficient use of daylight transmission systems.
The research also proposes a passive light collection-collimator module that efficiently couples light to a fibre bundle optimised to the highest packing efficiency that transports and distributes light evenly in a predefined room. Key findings highlight the importance of precise concentration by imaging CPC modules, collimation by SOE for coupling light onto the fibre bundle, and the impact of bundle packing efficiency(BPE) on transmission efficiency. A location-specific module arrangement with an optimised diffuser at the distribution end demonstrated improved year-round performance of the proposed system.