Heat Pump
Design Model

Welcome to the DOE/ORNL Heat Pump Design Model on the Web.
Mark VI Version with Dehumidifier / Ventilation Options

The DOE/ORNL Heat Pump Design Model is a research tool for use in the steady-state design analysis of air-to-air-heat pumps, air conditioners and dehumidifiers.

The WEB version has an HTML-based input interface which generates the required input text file, executes the FORTRAN application, and summarizes the results on your Web browser.

As this is a hardware-based model, the user can specify the heat exchangers and air flows and select a compressor. The flow control devices may be specified or sized by the program based on desired conditions leaving the heat exchangers. The program analyzes steady-state performance for indoor and outdoor air conditions provided by the user. An example case is provided.

The Web version also has parametric analysis capability. A variety of performance trends can be viewed for a range of operating or design variables.

NOTE!  To rerun html files that were saved before mid-Sept 2015, users will need to edit these files by replacing instances of with Files saved after mid-Sept 2015 should be reusable w/o any changes to the html file. We apologize for this inconvenience. (9/2015)

NEW!  Dehumidifier and Outdoor Ventilation Air Options

Capabilities of Mark VI Web Model

Earlier Web Interface and Feature Improvements

Please send comments/suggestions on the Web version to Bo Shen at Oak Ridge National Laboratory.

For more information on this and related ORNL heat pump models:

This program was developed by Oak Ridge National Laboratory (ORNL), Building Technologies Research and Integration Center (BTRIC) under sponsorship of the Department of Energy (DOE) Program of Building Technologies.

Since August 21, 1998,
The Web model has been run 342345 times.

The Web version was last revised on May 30, 2006.
This page was last updated February 25, 2013.