Abstract
In recent years, cascade use of waste energy, so called “heat cascading”, in the industrial sector is expected to be one of the promising measures for improving the energy efficiency of regional energy system. This paper discusses the feasibility of heat cascading among major energy intensive industries from technical and economical aspects.
The simulation results revealed that (i) the introduction of heat cascading contributes to the drastic energy saving, (ii) the energy transmission by electricity achieves the drastic energy saving when heat transmission loss is large, (iii) heat cascading promotes the efficiency of regional energy system including industrial, residential and commercial sectors by optimizing the energy flow in the heat combinat, (iv) high cost of heat transmission brings about a trade-off relationship between energy-saving and economical potentials, (v) the economical incentive such as reduction of cost of heat transmission and/or introduction of carbon tax relaxes the trade-off relationship.
