The growing global population has resulted in a higher demand for energy, leading researchers to prioritize the development of alternative energy sources and the improvement of current technologies. Nanofluids (NFs) are a promising method for enhancing heat transfer and efficiently utilizing solar thermal energy. This study describes the preparation of four NFs: two mono NFs of SiC and HfC containing nanoparticle concentrations ranging from 0.10–1.0 wt.%. Moreover, two hybrid NFs were synthesized within the same concentration range (0.10–1.0 wt.%) of SiC-HfC nanocomposites in proportions of 60 wt.% SiC-40 wt.% HfC and 40 wt.% SiC-60 wt.% HfC, all dispersed in a mixture of ethylene glycol (EG) and distilled water (50EG-50H₂O). The materials were synthesized by carbothermal reduction, and the NFs were prepared using the two-step method. The NFs showed stable dispersion, with HfC and 40SiC-60HfC systems exhibiting the higher zeta potential (ζ) values. Viscosity remained largely unaffected by particle addition. The thermal diffusivity of the NFs was measured by the thermal lens spectroscopy (TLS) technique using 1:20 diluted samples. The hybrid nanofluid 40SiC-60HfC improved diffusivity by 66.93%, presenting a synergistic effect in its performance, highlighting its potential in clean energy systems.

La luz juega un papel importante en el desarrollo de plantas ya sea de ornato o de consumo, no solo propiciando un crecimiento adecuado sino optimizando el uso de insumos para su desarrollo. En ese sentido en este proyecto se propone el control de un monocromador de la marca Oriel para optimizar el análisis de la luz LED que puede ser empleada en Agricultura de precisión. Esto debido a que el modelo disponible en el laboratorio de técnicas fototérmicas de UPIITA-IPN es de operación manual y los tiempos de barrido son altos. Para esto se usa un microcontrolador PIC 18F4550, un motor a pasos nema 23 y su driver microstep TB6600, una tarjeta de adquisición de datos NI USB 6009 de National Instruments y el software LabVIEW 20.0. El sistema se prueba con un LED RGB dando como resultado las curvas correspondientes a cada color. Finalmente, se tiene un monocromador con un control de interface en LabVIEW para determinar las longitudes de onda de luz LED utilizada para Agricultura.