Computer Applications
ASHRAE Technical Committee 1.5

Meeting Information

ASHRAE 2018 Annual Conference
Houston, TX

TC 1.5 is sponsoring or cosponsoring the following technical sessions at the ASHRAE 2018 Annual Conference.

Sunday, June 24, 11:00 a.m. - 12:30 p.m.

Seminar 16 (Intermediate)

Urban-Scale Energy Modeling, Part 8

Track: Fundamentals and Applications

Room: 372AD

Sponsors: TC 1.5 Computer Applications, and TC 4.7 Energy Calculations

Chair: Joshua New, Ph.D., Oak Ridge National Laboratory, Oak Ridge, TN


  • Identify different models' strengths and weaknesses and suggest best practice procedures for administrators of other campuses interested in developing more sustainable campuses


  • Understand the impacts of different thermal zoning methods and the use of floor multipliers on the Simulation Results of Urban Building Energy Models


  • Provide an overview of energy system model advances and integration with

  • urban building energy modeling


  • Describe how a platform for data aggregation can be used to simulate various energy models


Development of urban-scale building energy models is becoming increasingly tractable for many applications including utility-scale energy supply/demand strategies, urban development planning, electrical grid stability, and urban resilience. This seminar has assembled researchers from MIT, Lawrence Berkeley National Laboratory and commercial entities to demonstrate and empirically validate city-scale capabilities in the field of urban-scale energy models as well as discuss the data, algorithms, workflow and practical challenges addressed in their applications involving creation, analysis and visualization of useful models of individual buildings at the scale of a city, urban or metropolitan area.


1. A Comparison of Two Modeling Approaches for Establishing and Implementing Energy Use Reduction Targets for a University Campus

Shreshth Nagpal, MIT, Boston, MA

To reduce global greenhouse gas emissions associated with building energy use, owners of large building portfolios frequently rely on energy models to better understand potential costs and benefits of retrofits. Model development workflows that are designed for individual buildings require a level of effort that is extremely time and cost prohibitive for large campuses. With the goal of overcoming these limitations, two separate urban energy models were developed for the campus of the Massachusetts Institute of Technology to evaluate future energy scenarios. This presentation reviews both models for their strengths and limitations and suggests best practice procedures for administrators of other campuses interested in undergoing a similar exercise.


2. Impacts of Building Geometry Simplification on Energy Simulation Results of Urban Building Energy Models

Yixing Chen, Member, Lawrence Berkeley National Lab, Berkeley, CA

This study evaluates the impacts of three zoning methods (one zone per floor, split perimeter and core zones, and prototype shape) and the use of floor multipliers on the simulated energy use of 940 buildings in San Francisco using CityBES. Results show that simulated source energy use of buildings with floor multiplier are marginally higher by up to 2.6% than those modeling each floor explicitly, which take three times longer to run. Using different zoning methods leads to very different auto-sized equipment capacities and energy use. The study demonstrates zoning method has significant impacts on simulated energy use in buildings.


3. Stepping Outside the Door: Using Building Energy Modeling to Understand the Impact of Energy Choices

Matt Cox, The Greelink Group, Atlanta, GA

Building energy modeling has progressed to advanced stages where accurate and detailed understandings of building operations can be gleaned from small amounts of information. They can be scaled to cover large areas, painting a picture of entire communities. New advances in high-resolution energy system modeling can now be paired with these tools to provide detailed information on the impacts on equity, economic development, public health, water resource utilization, and greenhouse gas emissions. Combining these tools provides a powerful way to tell the story of increased efficiency and on-site generation, from a single building up to entire regions.



Monday, June 25, 6:30 p.m. – 9:00 p.m.

Seminar TC (Intermediate)

Early HVAC System Modeling and Efficiency Comparison Tool using the New Building Energy Efficiency Ratio (BEER)

Track: HVAC&R Analytics


Sponsor: TC 1.5 Computer Applications

Chair: Richard M. Bostian, WaterFurnance Interntaional, Edmond, OK

OPEN SESSION: No badge required; no PDHs awarded; presented during the TC's meeting.  This presentation discusses a method to compare the Energy and Life Cycle Cost of HVAC systems at the early design stage of a project. The 15 minute discussion is to seek advice and direction on peer review of the comprehensive modeling logic.  Currently 30 predefined complete HVAC systems which use AHRI data as the base are corrected for basic "as applied" models.  The methodology follows ASHRAE Standard 209P minimum requirements and is included in the free downloaded program.



Tuesday, June 26, 8:00 a.m. - 9:30 a.m.

Seminar 43 (Intermediate)

What is BACnet Tagging About?

Track: HVAC&R Control Freaks

Room: 372BE

Sponsors: 7.5 Smart Building Systems, 1.4 Control Theory and Application, SSPC 135 BACnet, and TC 1.5 Computer Applications

Chair: Carol Lomonaco, Johnson Controls, Milwaukee, WI


  • Understand what a tag is and how they may be able to benefit from their use


  • Understand why relationships are needed to fully define equipment and applications


  • Define proprietary tags within their own namespace


  • Understand how tags and relationships can be used with BACnet


1. Semantic Information on Building Data

Bernhard Isler, Siemens Switzerland, Zug, Switzerland

The semantic of the data is normally only recognizable by a human and binding the applications onto it is a manual configuration process, which can become very expensive in particular for applications that consume a lot of data. With the more modern concepts of semantic tagging of building data, machines can understand the semantic information and a much higher degree of automation of the binding procedures become possible. But with new tagging concepts, in order to achieve interoperability between applications and data, standardized semantic information concepts and semantic tag dictionaries are essential to

the building automation systems and more importantly to the end users, specifying engineers and product developers.


2. Why the Tagging Model is Essential to Having Interoperable Smart Devices That Can Communicate on an M2M Basis

Grant Wichenko, Member, Appin Associate, Wiinpieg, MB, Canada

This presentation covers why the tagging model is essential to having interoperable smart devices that can communicate on a machine-to-machine (M2M) basis from a specifying engineer's and/or user's point of view.


3. The Vision for Using Tags Moving Forward

Clifford Copass, Johnson Controls, Milwaukee, WI

In order to realize the full potential that is possible using tags, several improvements to the current state of affairs need to be made. Commonly used tags need to be standardized with common meanings that can apply across many vendors. Vendors need to supply appropriate tags with their products. The dictionary of commonly used tags must be expanded and made generic to apply to many building subsystems such as security, lighting, evacuation, fire protection, smoke control, energy management as well as a broad range of HVAC technologies. Rules and guidelines for tag selection must be published.


Attend a Committee Meeting

ALL ASHRAE committee meetings, including this TC’s meetings at the Winter and Annual Society conferences, are open to the public at no cost nor is conference registration required. Interested visitors, local chapter members, and potential new TC members are always welcome. However to attend technical program sessions sponsored by the TC will require registration and payment of any applicable fee.

Participation in an ASHRAE TC provides the opportunity to grow professionally and to contribute to the advancement of HVAC&R within an international organization recognized for shaping the future of the built environment through research, standards writing, publishing, and education.