This phenomena lead to requirement of dynamic exergy analysis approach through out heating period. Moreover heat demand increases with low out door temperature. The lower the temperature goes, heating system works on higher exegetic efficiency. The exergy of the system is directly related to environment temperature. On the other side consequent avoidable exogenous exergy destruction will reduced automatically. With optimal mass flow rate through pump and valve, avoidable endogenous exergy destruction can be reduced for pump and valve. Moreover, in heating system water is flowing through each component of the system, thus exergy destruction can be minimized by optimal mass flow rate. For more accurate results total physical exergy destruction of system is subdivided in mechanical and thermal exergy destruction. The possible room to improve performance of system’s component can estimated by applying the method of splitting exergy destruction to heating system. Splitting of exergy destruction in avoidable endogenous, unavoidable endogenous, avoidable exogenous an unavoidable exogenous would give precise result for system improvement for energy saving. Moreover, with combination of appropriate hydraulic-thermal coupled balancing and advanced exergy analysis, it possible to improve system component performance. To meet this demand pump and valve control would be programmed on the basis exergy demand of system.Ģ.Ědvanced exergy analysis: The advanced exergy analysis with splitting exergy destruction is best tool to analyze heating system to save energy consumption. The varying heat demand can be achieved by optimizing mass flow rate with the heating system. It is required to develop system with concept of dynamic approach to operate and response as per outdoor temperature fluctuation. Hydraulic and Thermal coupled balancing in heating system: To serve the purpose of energy saving, it is very crucial to optimize heating circuit from hydraulic and thermal point of view.
Introducing a concept of dynamic exergy demand and supply as per different outdoor temperature condition would be much advantageous. Exergy destruction in system can be minimized via optimizing the mass flow rate for varying heat demand under year around changing climate condition. Result obtained from that gives the best dimension of heat exchanger for minimum outlet temperature of water.Īdvanced exergy analysis and exergoeconomic analysis for heating system would be very promising method to forecast energy saving at pre-design stage for heating system. Nine models are made on the basis of taguchi method in NX 10.00 and CFX analysis is carried out in ANSYS 14.5. The prefix parameter (tube diameter) is used as an input variable and the output parameter is the maximum temperature difference of shell and tube heat exchanger. To increase the heat exchange capacity of heat exchanger optimization is done which seeks to identify the best parameter combination of heat exchangers. The transformations of the waste heat from the injection molding machine to the cooling water are dependent on the heat exchange capacity of heat exchangers. The shell and tube heat exchanger is widely used in industries as a chiller plant for transfer waste heat from the injection molding machine to the cooling water for improve the efficiency of the injection molding machine.
There are so many types of heat exchangers available but due to wide range of design possibilities, simple manufacturing, low maintenance cost, cross flow and counter flow heat exchanger extensively used in petroleum, petrochemical, air conditioning, food storage and other industries. The heat exchanger is major element as far as heat transfer and energy conservation is concern.