Principles of Manufacturing 1. Technological Systems: Part 1 Copyright © Texas Education Agency, All rights reserved

Bell Work Activity Directions: Please take out a sheet of paper and answer the following questions. a. Where do you think the energy to create power for your city originates? b.What happens when the demand for power becomes more than the system is capable of sustaining? c.How were homes heated in the 18 th century? 2 Copyright © Texas Education Agency, All rights reserved

a. There are several important terms and definitions students need to know. b. Students will now complete the matching definitions handout on Technological Systems; Students may work in groups. Warm-Up Activity Engineering and Technology Terms 3 Copyright © Texas Education Agency, All rights reserved

Technological Systems Systems are created to give us an organized way to complete tasks. We create systems by assembling the required items in a manner that allows them to work together to get things done. Technology enhances this process by allowing us to extend our potential farther than we normally could otherwise. 4 Copyright © Texas Education Agency, All rights reserved

Technological Systems Models A.Technological activities 1. Technology resources are used in the creation of systems 2. *Research and Development is a process used to create ideas and turn those ideas into products. 5 Copyright © Texas Education Agency, All rights reserved

Technological Systems Models (continued) B. Manufacturing activities are based on the mass production of standardized products in the minimum amount of time. Several systems have been created to enhance this process. *1. Just in time (JIT) – A manufacturing process that encourages the elimination of (in process) inventory by having the exact amount of material, at the right location, when needed. 6 Copyright © Texas Education Agency, All rights reserved

Technological Systems Models (continued) *2. The Packaging Process – is a vital part of the manufacturing process. It focuses on enclosing the finished product in a protective container for storage, distribution, sale and use. 7 Copyright © Texas Education Agency, All rights reserved

Open and Closed Loop System Models  Systems are designed to complete tasks and produce outputs. Open and closed loop systems are the most common basic models. A. Open Loop System 8 InputProcessOutput Copyright © Texas Education Agency, All rights reserved

*Open and Closed Loop System Models (continued) B. Closed Loop System 9 Input ProcessOutput Feedback Copyright © Texas Education Agency, All rights reserved

The Interaction of Technological Systems The understanding of systems models have given us the capacity to create a variety of products that greatly enhance our lives. Today we will complete an overview of 2 common systems:  Automobiles and Refrigeration Systems. 10 Copyright © Texas Education Agency, All rights reserved

The Interaction of Technological Systems (continued) *A. Automotive Systems 1.Engine 2.Drive train 3.Braking system 4.Electrical System 5.Cooling System 11 Copyright © Texas Education Agency, All rights reserved

Refrigerant flow The Interaction of Technological Systems (continued) *B. Refrigeration Systems 1.Compressor 2.Evaporator 3.Condenser 4.Thermostat cool airwarm air Copyright © Texas Education Agency, All rights reserved