Project Goal is for you to conduct an in-depth investigation of a HVAC component Select your component and your 3 top preferences (numbered) by Friday (9/23) at 5pm I will maximize happiness 25% of your grade

Deliverables Annotated bibliography Due 10/25 At least 10 peer-reviewed references And, no more than 4 non-peer-reviewed references Two sentences about each reference 1.Relevance of work to your topic 2.Specific results that you will use Primary grading criteria are specificity and quality of references Submit copies (electronic or analog) with your bibliography

Deliverables Oral Presentation Due 12/6 10 minute oral presentation +3 minutes questions Evaluation criteria: Clear visuals Engaging speaker Depth of investigation Creativity/innovation Response to questions Portion of evaluation will come from peers

Project Components 1)Design manual How do you select this component? What are most important factors? What are typical values of these parameters for residential and commercial HVAC systems? What should designers know about this component? 2)Current research issues What are the current/recent research issues for this component? What are recent improvements and what benefits do they yield? What will this component look like in 30 years?

Evaluation Major criteria is depth 10% Annotated bibliography 20% Oral presentation 10% 1) Thoroughness and utility 20% 2) Depth and justification 15% 3) Answers requested questions 15% Quality of writing and analysis 10% Quality and completeness of references

Components Feel free to suggest your own 1.Particle filters 2.UV disinfection systems 3.Fans 4.Compressors 5.Evaporator coils 6.Cooling towers 7.Economizers 8.CO 2 ventilation controls 9.Personal ventilation systems 10.Expansion valves

Literature Search It is not acceptable to reference websites for this project. Several tools available Practically, I use two: Web of Science Engineering Index Many others available Useful information before 1995 Many errors in search engines/interface Some issues with connecting from off-campus

Engineering Index Journals and conference proceedings Including ASHRAE Transactions Watch out for non-peer reviewed material UT library Research Tools, Databases and Indexes to Articles E Engineering Index Also goes by Engineering Village, EI Compendex, etc.

Web of Science Journals Citation searches Very quickly locate seminal articles UT library Research Tools, Databases and Indexes to Articles W Web of Science AKA Science Citation Index

Search Soon to Practice Try searches for components Gauge whether articles are available See if component is really interesting (to you) Come see me if you have not done a literature search before Many tricks and tips

Objectives Show HVAC processes on a psychrometric chart Draw condition lines Define sensible heat ratio Draw HVAC processes for real buildings Single zone Multiple zone

Adiabatic mixing Governing equation

Sensible heating

Dehumidification by Cooling

Real Dehumidification Process Sensible heat ratio, SHR = Q RS /Q R

Humidification h w Specific enthalpy of water added to system h g Specific enthalpy of saturated water vapor

Homework #2 6 problems Worth different amounts Some closely follow examples in book and from lecture Assignment #1 will be handed back on Thursday (I hope) Skip Chapter 9, will cover chapter 10 on Thursday