A study of energy consumption for office buildings in Vietnam for sustainable energy and climate change mitigation

Duy-Dong Nguyen,Ngoc-Quang Tran,Duc-Luong Nguyen,Van-Dat Mac,My-Anh Nguyen,Tuan-Viet Hoang,Joseph Deringer

doi:10.55066/proc-icec.2021.19

Abstract

This study used survey data to evaluate the current status of electrical energy use of commercial office (CO) and governmental office (GO) buildings in Hanoi and Ho Chi Minh City (HCMC) in Vietnam. Main data used in the analyses including floor area and monthly electricity consumption which were gathered from the questionnaire survey for 57 CO and GO buildings in two cities – conducted by the Vietnam Clean Energy Program in 2015. The basic statistical analysis techniques were used to evaluate the electricity consumption intensity of office buildings and preliminarily analyze key factors affecting the energy consumption of these buildings. The results generally showed that CO buildings consumed significantly more electricity than GO buildings in all months of the year and the variation and trend of mean monthly electricity consumption intensity of the buildings strongly depend on that of ambient air temperature. In addition, the energy use intensities (EUIs) of CO buildings, GO buildings, and both buildings (CO+GO) in HCMC (in a hot climate all year round) were higher than those in Hanoi (in a climate with four distinct seasons). The mean EUIs of these buildings in Hanoi, HCMC, and both cities were 105.9, 116.4, and 109.6 kWh/m2 floor. year. The findings of this study are useful information on the status of energy use and energy efficiency of CO and GO buildings in Hanoi and HCMC, thereby contribute scientific bases to the development of policies and solutions to promote the energy efficiency of CO and GO buildings in the coming years and urgent actions for sustainable energy and climate change mitigation in Vietnam.

Highlights

Energy consumption by the building sector accounts for a large part of the total global energy consumption and about 30% of total CO2 emissions [1] that cause climate change, global warming, and environmental pollution
This study focused on assessing the energy consumption and efficiency of commercial office (CO) and governmental office (GO) buildings through the site energy use intensities (EUIs) indicator, hereafter referred to as the EUI [17] which is represented by the formula: EUI = E
For a better understanding of the situation on energy consumption and efficiency of CO and GO buildings in Hanoi and Ho Chi Minh City (HCMC), this study focused on analyzing the mean monthly and annual electricity consumption of buildings and preliminarily assessed factors that affect the energy consumption of CO and GO buildings

Summary

Introduction

Energy consumption by the building sector accounts for a large part (about 40%) of the total global energy consumption and about 30% of total CO2 emissions [1] that cause climate change, global warming, and environmental pollution. According to the draft of the National Strategy on Green Growth for the Period of 2021-2030, vision to 2050, the strategy sets a target that the GHG emissions intensity per GDP will be reduced about 10-15% by 2030 compared to that of the base year 2014 [2] To achieve these national goals, a variety of solutions for each sector and field have been proposed, in which the construction industry is one of the sectors that play the most important role of the strategy in implementing GHG. Manuscript received 11 August, 2021; revised 22 November, 2021; accepted 5 January, 2022; published 19 January, 2022

Objectives

Results

Conclusion