Effect of burner-to-plate distance on heat transfer rate in a domestic stove using LPG

LPG is increasingly used in households as it is a clean and environmentally friendly energy source. In this work, we experimentally tested the type of LPG burner used in Thailand. This work investigates the effect of varying the burner-to-plate distance on heat transfer from the flame produced by LPG combustion. The burner model KB-5 was tested to evaluate the heat transfer rate (Q) via a measuring plate heated directly from the burner. Flowing water was used to cool the measuring plate. Moreover, the inlet and outlet temperatures were measured. The burner-to-plate distance (H/d) was studied, with varying the flow rate of LPG. The results showed that the highest heat transfer rate was found at higher burner-to-plate distances when the LPG flow rate increased. In addition, the highest heat transfer rate occurred when the flame impinged on the heated surface. In this work, the total flame length should impinge at a surface approximately 70% of its length to get optimal results. The results of this work can be applied to optimize other types of domestic stoves. Furthermore, this promising result helps households and small businesses save costs on LPG stove fuel.

Automated summary

Through experimental testing of the effect of varying the burner-to-plate distance on heat transfer, it was found that higher heat transfer rates were achieved at larger distances when the LPG flow rate increased. Additionally, optimal results occurred when the flame impinged on the heated surface.