INTRODUCTION The reduction or reuse of waste heat provides an excellent opportunity for cost

3400 WordsApr 23, 201914 Pages
INTRODUCTION The reduction or reuse of waste heat provides an excellent opportunity for cost saving within Industrial, Commercial and Institutional facilities in India. Development of innovative thermodynamic cycles is important for the efficient utilization of low-temperature heat sources such as solar, geothermal, and waste heat sources. Binary mixtures exhibit variable boiling temperatures during the boiling process, which leads to a good thermal match between the heating fluid and working fluid for efficient heat source utilization. This study presents a theoretical and an experimental analysis of a combined power/cooling cycle, which combines the Rankine and absorption refrigeration cycles, uses ammonia-water mixture as the working…show more content…
HEAT AND HEAT TRANSFER Experience shows that when a hot object is brought into contact with a cold object, the hot object becomes cooler and the cold object becomes warmer. This energy in transit is a result of temperature difference and is called “heat”. The fact that heat always flows from a higher to lower temperature leads to the concept that temperature is the driving force for the transfer of energy as heat. Heat transfer deals with the mechanisms responsible for transferring heat from one place to another when a temperature difference exists between two objects. Heat is measured in kilojoules(kJ) of energy and heat transferred is usually expressed as a unit of time , i.e., kJ/s or kJ/h. Cascading Energy cascading can be defined as the organization of the flow and reuse of energy through various systems, production processes and equipment, to achieve the maximum efficiency of energy use. In essence, the objective is to use the maximumamount of energy available from a given source. The maximum efficiency is obtained through a sequential degradation or lowering of the quality of energy as each task is performed, in the same sense as the potential energy of falling water diminishes in the rapids and waterfalls of a river. It is this comparison which has led to the adoption of the world cascading that can be achieved in a system. In the most situation energy cascading can be optimized by retrofit measures which extract waste heat from higher temperature

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