Heat Pump Design Model


Research tool for use in the steady-state simulation and design analysis of heat pumps and air conditioners. The program can be used with most of the newer HFC refrigerants as well as with HCFCs and CFCs. The standard vapor-compression cycle is modeled with empirical representations for compressor performance and first-principle region-by-region modeling of the heat exchangers.

An online Mark VII Web version is available that can be used with default configurations or with user-specified component and operating parameters for analyzing the performance of single-speed, air-to-air equipment. User configurations can be saved for later use. Parametric analyses can be conducted.

Another online Web version can be used to model dehumidifiers at https://web.ornl.gov/~doehpdm/hpdm/MarkVI_DH.shtml

A downloadable desktop version for Windows with Excel-generated text file input is also available on the home page of the Mark 7 web site. That version can also be used to model multi-speed, water-to-air, and water-to-water heat pumps as well as dehumidifiers and evaporative condensers.

SeeĀ sample pages. Keep in mind these are only sample pages so the links and buttons will not work.

External Link to Product Page:
United States
Major Capabilities:
HVAC System Selection and Sizing, Parametrics and Optimization
Building Type:
Subsystem Level
Air Conditioner, Heat pump, Dehumidifier, Evaporative Condenser, Equipment Design
Windows, Web/Saas
Help And Support:
Free Email Support
Last Software Update:
December 4, 2017
Moderate-to-high level of technical understanding of vapor-compression heat pumps to use effectively.
Public and private research/consulting organizations, research and development engineers of air-conditioning and heat pump equipment companies, university engineering faculty and graduate students.
Compressor performance map, heat exchanger and (optionally) flow control design information. Defaults are provided to run sample case for design capacity cooling or heating condition. HTML-forms-based input that can be locally saved for later reuse.
Summary cycle diagrams of operating conditions, component sizing and performance, and charge requirements; tabular and spreadsheet exportable data sets of parametric results; user-selectable levels of text output.
Predicts EER, capacity, air- and refrigerant-side conditions for cooling or heating operation with first-principles heat exchanger modeling; handles a variety of refrigerants; will size flow control devices given heat exchanger (HX) design exit conditions; useful in studying the general performance trends when varying HX design parameters (with or without a fixed design capacity) and operating conditions (with or without a fixed refrigerant charge and flow control); moderate accuracy with fast execution; user-tuneable; two-variable parametrics capability.