PARABOLIC SHAPED

This study investigated the comparative drying performance and product quality of fluted pumpkin (Telfairia occidentalis) leaves processed using traditional open sun drying (OSD) and an improved parabolic-shaped solar dryer (PSSD). Freshly harvested fluted pumpkin leaves were divided into two batches and dried under both methods to a target moisture content of 10% (wet basis). Key performance indicators measured included drying time, drying rate, and final moisture content, while sensory attributes such as colour, odour, texture, and overall acceptability were assessed using a 9-point Hedonic Scale. Results revealed that the PSSD achieved significantly faster drying (4.55 h) and higher drying (21.78 g/hr) compared to OSD (6.05 h and 16.22 g/hr, respectively), with the statistically significant (p = 0.027). Sensory evaluation further indicated that leaves dried with the PSSD were preferred (overall acceptability = 7.9) to those dried under open sunlight (5.9), with superior colour retention and aroma preservation (p < 0.001). The enhanced efficiency and product quality observed in parabolic solar drying demonstrate its potential as a sustainable, energy-efficient alternative for preserving perishable leafy vegetables in Nigeria. Adoption of this technology can substantially reduce postharvest losses, improve marketability, and promote year-round availability of nutrient-rich vegetables like fluted pumpkin.