1. Hybrid HVAC System Design Spreadsheet
                            
Rahul Pendse
Dr. Ashok Kumar
Abhilash Vijayan
University of Toledo

2. Description
Develop ideal times for natural ventilation to work, based on thermal mass, rate of ventilation, effect of difference in moisture content, effect of latent heat emitted by various sources and thermal comfort range, and optimized cooling times by use of indoor temperature as an index.
Develop a software package that aids a designer with a ventilation system to achieve the above objectives.

3. Factors affecting heat characteristics

4. Application of the Tool
Office
Manufacturing Plant
Sections of the tool
Input
Walls & Windows
Lighting
Final
User’s Guide

5. Input Sheet
Requires basic information about the operation of the unit.
Accounts for the heat gain due to motors, furnishings and workmen.

6. Walls & Windows Sheet
Requires information about the area, alignment and thermal conductivity of walls and windows.
The sheet employs compute buttons to calculate different factors, which provides the heat gain due to walls and windows for final calculation.

7. Lighting Sheet
User is required to selects the type of light and the number of each corresponding type.
Calculates the heat generated by the lightings and supplies to the final sheet.

8. Final Sheet Provides the final calculation for the indoor temperature.
User is not required to input any information. It automatically takes all the required data from the previous sheets.

9. User’s Guide
Contains information required for comfortable working with the tool.
Gives an easy step by step approach for determining cooling hours.