Technical Support Document: 50% Energy Savings Design Technology Packages for Highway Lodging Buildings

Abstract

This Technical Support Document (TSD) describes the process, methodology and assumptions for development of the 50% Energy Savings Design Technology Packages for Highway Lodging Buildings.This design guidance document provides specific recommendations for achieving 50% energy savings in highway lodging properties over the energy-efficiency levels contained in ANSI/ASHRAE/IESNA Standard 90.1-2004 (ANSI/ASHRAE/IESNA 2004a). These 50% savings design packages represent a further significant step towards realization of the U.S. Department of Energy's (DOE) net-zero energy building goal for new construction by the year 2025. DOE has previously supported the development of a series of 30% energy savings design guides, which were developed by a partnership of organizations, including the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE), the American Institute of Architects (AIA), the Illuminating Engineering Society of North America (IESNA), the United States Green Buildings Council (USGBC), as well as DOE 1 .This report provides recommendations and user-friendly design assistance to designers, developers, and owners of highway lodging properties and is intended to encourage steady progress towards net-zero energy performance in these buildings. The design package provides prescriptive recommendation packages that are capable of reaching the 50% energy savings target for each climate zone, thereby easing the burden of the design and construction of highway lodging with exemplary energy performance.To develop the set of energy efficiency measure recommendations that meet, or exceed, the 50% goal, we used a highway lodging prototype, adapted from previous work for achieving 30% savings in the Advanced Energy Design Guide for Highway Lodging Buildings (AEDG-HL), to represent this class of buildings.We created baseline models from the prototype that are minimally code-compliant with ASHRAE 90.1-2004, and advanced models based on the recommended energy-efficient technologies. To determine the energy savings at different climate locations, we performed EnergyPlus simulation analyses. The simulation approach used is documented in this TSD, along with the characteristics of the prototype and assumptions of the baseline and advanced models.Finally, we assessed the cost effectiveness of the energy-efficient technologies recommended in the design package using the simple payback period method.Prescriptive packages of recommendations presented in the design package by climate zone include enhanced envelope technologies, interior and exterior lighting technologies, heating, ventilating, and airconditioning (HVAC) and service water heating (SWH) technologies, and miscellaneous appliance technologies. Final energy efficiency recommendations for each climate zone are included, along with the results of the energy simulations indicating a national-weighted average energy savings over all buildings and climates of 55.5% in comparison with the Standard 90.1-2004 as baseline.A cost estimate of the re...

Energy Saving Impact of ASHRAE 90.1 Vestibule Requirements: Modeling of Air Infiltration through Door Openings

“…In the calculation, the energy savings were assumed to be zero for those climate zones where are not subject to the new ASHRAE 90.1-2007 and subsequent addenda vestibule requirements (see Tables 3 and 4), and this was reflected in the saving calculations and in Figures 3 through 14. The weighting factors, as well as the method to estimate the weighting factors and their values can be found in PNNL reports [10,11].…”

Technical Support Document: 50% Energy Savings for Small Office Buildings

“…In FY2009 PNNL started the effort for 50% energy savings with the medium office and highway lodging technical support documents and published two reports in September 2009 , Jiang et al 2009). In FY2010, PNNL focuses on two building types to analyze 50% energy savings performance: small offices (this report) and quick service restaurants (in development as a sister report).…”

“…Small offices are less dominated by interior gains and are affected more by building envelope losses and gains than larger buildings. The building envelope thermal properties were selected from the most stringent among several sources including the 30% AEDG series, the 50% TSD for Medium Offices ), and the 50% TSD for Highway Lodging (Jiang et al 2009), and the 1 st and 2 nd public review drafts of Addendum bb to Standard 90.1-2007 (BSR/ASHRAE/IES 2009a and 2009b). The envelope selections are not optimized, rather the initial values were tested for success in achieving the 50% savings goal and kept when the goal of 50% savings is met.…”

Technical Support Document: 50% Energy Savings for Quick-Service Restaurants

“…During FY 2009, PNNL initiated efforts for 50% energy savings with the medium office and highway lodging TSDs and published two reports in September 2009 (Jiang et al 2009;Thornton et al 2009). In FY 2010, PNNL has focused on developing 50% energy savings paths for quick-service restaurants (this TSD) and small offices (Thornton et al 2010).…”

“…This project adopts an energy saving evaluation approach that is similar to the one used for the development of the recently completed 50% TSDs for highway lodging, medium office, and small office building (Jiang et al 2009;Thornton et al 2009;Thornton et al 2010), and to the technical analysis performed for the earlier 30% AEDG series. The 30% AEDG series used 15 climate locations to represent the eight climate zones defined in the Standard 90.1-2004 Liu et al 2006;Liu et al 2007;Pless et al 2007;Jiang et al 2008;Bonnema et al 2010).…”