Energy efficiency in Thermal utilities Ch-4 (Furnaces) A furnace is an equipment to melt metals for casting or heat materials for change of shape (Rolling, forging etc) or change of properties (heat treatment). 4.1 Types and Classification of Different Furnaces Based on the method of generating heat, furnaces are broadly classified into two types namely 1.combustion type (using fuels) and 2.electric type. The combustion type furnace can be broadly classified oil fired, coal fired or gas fired, depending upon the kind of combustion. Based on the code of charging of material furnaces can be classified as (i) Intermittent or Batch type furnace or Periodical furnace and (ii) Continuous furnace. Based on mode of waste heat recovery as recuperative and regenerative furnaces. Another type of furnace classification is made based on mode of heat transfer, mode of charging and mode of heat recovery as shown in the Figure 4.1 below. The electric furnaces can be broadly classified as res
(Quality Education in Engineering)