Kouvola Housing fair NZEB houses energy, cost and carbon analyses

Kaiser Ahmed,Tero Hasu,Hatef Hajian,Jarek Kurnitski

doi:10.1051/e3sconf/202017213001

Kaiser Ahmed, Tero Hasu + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/202017213001

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Abstract

Building energy efficiency, construction cost, life cycle cost, and carbon emission are the best interests of users, owners and different vendors. This study assessed the energy performance (EP) related investment and operational energy cost of Kouvola housing fair NZEB. Data from 12 new detached houses were collected, which fulfilled the energy certificate class of B according to the Finnish nearly zero energy building (NZEB) regulation. Besides, emission from building materials, construction and energy use during 50 years of one model building were estimated, aiming to compare the life cycle emission from wooden building, insulated concrete building, blockhouse and log house. The results showed that the total construction cost was independent to EP-value and even had a slightly negative correlation to the EP-value. The average EP-value of 12 buildings was slightly higher than that of buildings in Tampere housing fair 2012, which showed no improvement of nearly zero energy building (NZEB) guidelines since 2012. Energy performance related cost dependency in specific cost categories was shown so that EP-value improvement by 40 units increased less than 2% of construction cost. Electricity had a significant contribution to CO2emission while local district heating was based on renewables. Material emissions contribution was 32-48% of total emissions, and wooden buildings showed lower carbon footprint compared to other building structures.

Highlights

Energy performance is generally linked to the amount of energy required in order to have sufficient environmental standards and to accomplish the building purpose[1]
Carbon emissions were compared with four different structures, namely wooden building, insulated concrete building, blockhouse and log house
According to the Finnish nearly zero energy building (NZEB) regulation, all buildings achieved energy certificate class B so that energy performance was close to NZEB limit and houses were insulated as little as the minimum reference U-values allow

Summary

Introduction

Energy performance is generally linked to the amount of energy required in order to have sufficient environmental standards and to accomplish the building purpose[1]. Lowering energy use is a well-known and pressing issue, as several reports have emphasized the effect of energy consumption on climate change [2]. Kurnitski [3] listed the common measures for achieving the NZEB targets for non-residential buildings such as balanced heat recovery ventilation system, façade with highly utilization of daylight, efficient HVAC and so on. The analysis of energy usage during the operating process may promote the renovation of the current building stock by retrofits and behavioural change programs[4]. Kurnitski [6] listed the common measures for achieving the nearly zero energy building (NZEB) targets for nonresidential buildings such as balanced heat recovery ventilation system, façade with highly utilization of daylight, efficient HVAC and so on

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