Paper Conference

2018 Building Performance Analysis Conference and SimBuild co-organized by ASHRAE and IBPSA-USA


Reading and Writing Standardized HVAC Performance Data: An Early Implementation of ASHRAE Standard 205P

Neal Kruis, Charles Barnaby
Big Ladder Software, Denver, CO
Retired, Moultonborough, NH

Abstract: ASHRAE Standard 205P recently concluded its first advisory public review. The standard, entitled “Standard Representation of Performance Simulation Data for HVAC&R and Other Facility Equipment”, makes the first attempt to standardize the way performance data is conveyed between HVAC equipment manufacturers and energy modelers. The standard defines specific data elements that represent the complete performance of equipment for use in building performance simulation tools. In parallel with the public review, an initial implementation of the standard was prototyped using Google’s FlatBuffer data serialization format. FlatBuffers provides a very computationally and memory efficient format that is also compatible with the more common JSON format. FlatBuffers generates minimal software source code in several languages including C/C++, Python, Java, and JavaScript based on a single schema describing the data elements. A prototype implementation demonstrates the process of generating an ASHRAE Standard 205P liquid-cooled chiller data file from a manufacturer’s spreadsheet using Python, and subsequently reading that same file into a C++ program. This process demonstrates the versatility of the new standardized data format. Any participating manufacturer can use a similar process to provide equipment performance to a user that will represent a specific model in any participating simulation software tool.
Pages: 352 - 358