Optimal selection of sustainability measures to minimize building operational costs

Moatassem Abdallah, Khaled El-Rayes, Liang Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Buildings are responsible for 40% of the national annual energy consumption, 72% of electricity consumption, 13% of water consumption, 39% of all carbon footprint, and 30% of the total waste output in the United States. These negative environmental and economic effects have motivated many owners to explore various sustainability measures in their buildings, including energy efficient devices (such as LED and fluorescent lighting, HVAC systems, ground-source heat pumps, hand dryers, vending machines, refrigerators, and water heaters); renewable energy equipment (such as solar panels and wind turbines); and water saving plumbing fixtures (such as efficient faucets, urinals, and toilets). These sustainability measures can improve building performance in terms of energy efficiency, water conservation, waste reduction, and longer life cycle. Despite higher initial costs, in most cases, these sustainability measures can pay back these costs because of their lower energy and water consumption. Because of the large combination of options and the payback period, decision makers often are faced with the challenges of which option to select because of limited budgets. This paper presents an optimization model that is designed to identify an optimal selection of building sustainability measures that are capable of minimizing the annual operational costs of the building while complying with a limited upgrade budget. The optimization model analyzes the replacement of building fixtures and equipment with more energy- and water-efficient alternatives to reduce building operational costs. The optimization analysis accounts for the initial replacement cost, maintenance cost, operational costs, energy and water savings, discount rate, payback period, and functional performance. An application example of a public building is used to illustrate the capabilities of the developed optimization model and verify its results.

Original languageEnglish (US)
Title of host publicationConstruction Research Congress 2014
Subtitle of host publicationConstruction in a Global Network - Proceedings of the 2014 Construction Research Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages2205-2213
Number of pages9
ISBN (Print)9780784413517
DOIs
StatePublished - Jan 1 2014
Event2014 Construction Research Congress: Construction in a Global Network, CRC 2014 - Atlanta, GA, United States
Duration: May 19 2014May 21 2014

Publication series

NameConstruction Research Congress 2014: Construction in a Global Network - Proceedings of the 2014 Construction Research Congress

Other

Other2014 Construction Research Congress: Construction in a Global Network, CRC 2014
CountryUnited States
CityAtlanta, GA
Period5/19/145/21/14

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ASJC Scopus subject areas

  • Building and Construction

Cite this

Abdallah, M., El-Rayes, K., & Liu, L. (2014). Optimal selection of sustainability measures to minimize building operational costs. In Construction Research Congress 2014: Construction in a Global Network - Proceedings of the 2014 Construction Research Congress (pp. 2205-2213). (Construction Research Congress 2014: Construction in a Global Network - Proceedings of the 2014 Construction Research Congress). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784413517.0224