Book contents
- Frontmatter
- Contents
- Preface
- 1 Introduction
- 2 Need Identification and Analysis
- 3 Need Identification and Analysis Case Study: Packing Factor of Sand in Electrical Fuses
- 4 Introduction to Parameter Analysis
- 5 Parameter Analysis Put to Work
- 6 Conceptual Design Case Study: HVAC Airflow Sensor
- 7 Conceptual Design Case Study: Cut-Edge Sensor for Flooring Removal
- 8 Conceptual Design Case Study: Low-Cost Industrial Indexing Systems
- 9 Conceptual Design Case Study: Equal-Channel-Angular-Extrusion Metalworking
- 10 Need Analysis and Conceptual Design Case Study: “Ball Mover”
- 11 Technology Observation
- 12 Conclusion
- Index
6 - Conceptual Design Case Study: HVAC Airflow Sensor
Published online by Cambridge University Press: 14 January 2010
- Frontmatter
- Contents
- Preface
- 1 Introduction
- 2 Need Identification and Analysis
- 3 Need Identification and Analysis Case Study: Packing Factor of Sand in Electrical Fuses
- 4 Introduction to Parameter Analysis
- 5 Parameter Analysis Put to Work
- 6 Conceptual Design Case Study: HVAC Airflow Sensor
- 7 Conceptual Design Case Study: Cut-Edge Sensor for Flooring Removal
- 8 Conceptual Design Case Study: Low-Cost Industrial Indexing Systems
- 9 Conceptual Design Case Study: Equal-Channel-Angular-Extrusion Metalworking
- 10 Need Analysis and Conceptual Design Case Study: “Ball Mover”
- 11 Technology Observation
- 12 Conclusion
- Index
Summary
As the first detailed case study of conceptual design using the parameter analysis methodology, this chapter presents a relatively simple design example. Only a partial need analysis, highlighting the most important issues, is given here. The discussion under the value category uncovers the importance of keeping the cost down, and this issue also proves to be the dominant parameter in the development of the concept. This case study demonstrates the sequential evolution of the design throughout the parameter analysis process.
The Initial Need
Heating, ventilating, and air conditioning (HVAC) systems in buildings consist of a heating source, a cooling source, a fan to force airflow, and a closed-loop temperature control system. The last-named component usually includes a computer to compare actual temperature readings to set, or desired, values and activate the system accordingly. Such a system can handle the temperature well, but it does not account for the “freshness” of the indoor air. If conditions happen to be such that the temperature does not need to be actively changed by the system for a relatively long period of time, the air may become uncomfortably stale. The need is therefore to design a sensor to measure the airflow in HVAC ducts to allow the control system to monitor the number of air-volume exchanges in the rooms.
Abbreviated Need Analysis
Performance
The sensor needs to tell the computer how much volume of air per unit time passes through the duct.
- Type
- Chapter
- Information
- Innovative Conceptual DesignTheory and Application of Parameter Analysis, pp. 105 - 122Publisher: Cambridge University PressPrint publication year: 2001