Tham khảo tài liệu 'design and optimization of thermal systems episode 1 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 72 Design and Optimization of Thermal Systems FIGURE Various steps involved in the design and optimization of a thermal system and in the implementation of the design. involved in these steps are outlined in the following sections and some of the crucial elements such as modeling simulation and optimization are discussed in greater detail in later chapters. Physical System The starting point of the quantitative design process is the physical system obtained from conceptual design. This serves as the initial design that is modeled simulated and evaluated in the search for an acceptable design. Therefore the system must be well defined in terms of the following 1. Overall geometry and configuration of the system 2. Different components or subsystems that constitute the system 3. Interaction between the various components 4. Given or fixed quantities in the system 5. Initial values of the design variables A sketch may be used to represent the system configuration and the various components that interact with each other. Several of these were given in Chapter 1. For instance Figure presents the schematic for vapor compression and vapor absorption systems for refrigeration and air conditioning. Similarly Figure gives the physical representations for several manufacturing thermal systems and Figure gives those for electronic equipment cooling systems. These sketches indicate the different components and subsystems that are part of the overall thermal system. The physical characteristics of these components and how they are linked with the others particularly in terms of material heat and fluid flow are also included. In several cases particularly for thermodynamic systems the behavior and characteristics of the system may be represented graphically. State diagrams which represent the equilibrium states through which a given material goes are commonly used to indicate the thermodynamic cycle in many applications such as those related to .
