The contribution of isolated details and the sensitivity of overall thermal performance to these details is presented herein. The parametric study included steel thickness, stud depth, stud spacing, and was conducted across ASHRAE 90.1 climate zones.
To determine the influence of these engineering decisions, a large parametric study of wall assemblies was conducted via three-dimensional steady-state thermal analysis. While the performance and efficacy of insulating materials and potential mitigation strategies is known, prior works have not examined the impact of specific detailing inherent to these wall systems. These assemblies are typically comprised of studs and tracks, sheathed in gypsum and weather-proofing sheathing. This work specifically examines the thermal behavior of cold-formed steel wall assemblies. Furthermore, poor thermal performance also results in condensation and occupant discomfort. Thermal bridges have a negative impact on overall embodied energy in the structure, which can be compounded over the service life of a building.
Option 4.Steel elements installed at or in the building envelope are susceptible to forming thermal bridges, where heat and energy are transferred from the building interior to the exterior. HVAC and service water heating equipment efficiency and.Must not have more than 2,000 square feet of data center space, laboratory space, or manufacturing space.ĭemonstrate an improvement beyond ASHRAE/ASHRAE/IESNA Standard 90.1–2016, with errata, for the following systems: Projects must use the ASHRAE 90.1-2016 Prescriptive compliance path in EA Prerequisite Minimum Energy Performance, and Implement and document compliance with the applicable recommendations and standards in Chapter 4, Design Strategies and Recommendations by Climate Zone, for the appropriate ASHRAE 50% Advanced Energy Design Guide and climate zone. Projects must use the ASHRAE 90.1-2016 Prescriptive compliance path in EA Prerequisite Minimum Energy Performance. Projects must meet the Scope requirements of the applicable AEDGs (or combination of AEDGs for mixed use), and Prescriptive Compliance: ASHRAE Advanced Energy Design Guide (1–6 points, 1-4 points CS) Points for percentage improvement in energy performance – % Greenhouse Gas Emissions PCI below PCIt (1-9 points NC, 1-8 points Schools, 1-10 points Healthcare) New Construction
Points for percentage improvement in energy performance – % Cost PCI below PCIt (1-9 points NC and CS, 1-8 points Schools, 1-10 points Healthcare) New Construction Energy Performance Compliance (1–18 points except Schools and Healthcare, 1–16 points Schools, 1–20 points Healthcare)ĭemonstrate a Performance Cost Index (PCI)1 below the Performance Cost Index Target (PCIt) calculated in accordance with Section 4.2.1.1 of ANSI/ASHRAE/IESNA Standard 90.1-2016, Appendix GĬalculate the PCI, PCIt, and percentage improvement using metrics of cost and greenhouse gas (GHG) emissions.įor project percent improvement for the cost metric, on-site renewable energy may be subtracted from proposed energy cost prior to calculating proposed building performance per ASHRAE Standard 90.1- 2016 Section G 2.4.1. Use energy simulation of efficiency opportunities, past energy simulation analyses for similar buildings, or published data (e.g., Advanced Energy Design Guides) from analyses for similar buildings.Īnalyze efficiency measures, focusing on load reduction and HVAC-related NC, CS, S CHOOLS, R ETAIL, W AREHOUSES & D ISTRIBUTION C ENTERS, H OSPITALITY, H EALTHCAREĮstablish an energy performance target no later than the schematic design phase.Īnalyze efficiency measures during the design process and account for the results in design decision making. New Construction (1–18 points), Core & Shell (1–18 points),Schools (1–16 points),Retail (1–18 points),Data Centers (1–18 points),Warehouses & Distribution Centers (1–18 points),Hospitality (1–18 points),Healthcare (1–20 points) To achieve increasing levels of energy performance beyond the prerequisite standard to reduce environmental and economic harms associated with excessive energy use.