Abstract

A demonstration house was previously built and commissioned in Iqaluit, Nunavut, Canada. The purpose of the overall effort is to develop and integrate technologies and evaluate the performance of a high-performance building located in the Canadian Arctic, while considering the unique social, economic, and logistical challenges associated with its remote location. Previous work consisted of monitoring and reporting on the energy use from heating between April 2016 and April 2017. The purpose of this next stage of research is to contribute experimental data of the prototype demand-controlled residential ventilation system in the extremely cold climate of Iqaluit, where the average annual outdoor temperature is approximately −9 °C. This paper outlines the development, implementation and monitoring of the carbon dioxide-based demand-controlled heat recovery ventilation system that took place between April 2017 and April 2019. The system was equipped with two electric preheaters to ensure that frost build-up did not occur in the heat recovery ventilator (HRV) and adequate ventilation could be maintained according to the demand. An electric heater was included after the HRV to control the supply air temperature. Between December 2018 and February 2019 the electricity consumption of the HRV, preheaters, and supply air heater were measured for the lowest ventilation rate of the system, 15.5 L/s. Pertinent temperatures in the ventilation system were also monitored to enable assessment of the system’s performance. A comparison of the sensible recovery efficiency (SRE) of the HRV and overall system is presented. Experiments displayed that, on average, the SRE of the HRV and system were 72% and 35%, respectively. The total energy use of the ventilation system was 390 kWh over the two months, which translates to 6.30 kWh/day, an energy use intensity of 0.27 kWh/m²/day, or 12.25 Wh/m³ of outdoor air supplied.

摘要

之前在加拿大努纳武特的伊魁特建造并启用了一座示范屋。总体工作的目的是开发和整合技术并评估位于加拿大北极地区的高性能建筑的性能，同时考虑与其偏远地区相关的独特社会、经济和物流挑战。之前的工作包括监测和报告 2016 年 4 月至 2017 年 4 月期间的供暖能源使用情况。下一阶段研究的目的是提供原型需求控制住宅通风系统在伊魁特极冷气候下的实验数据，其中年平均室外温度约为 -9 °C。本文概述了发展，实施和监测 2017 年 4 月至 2019 年 4 月期间发生的基于二氧化碳的需求控制的热回收通风系统。该系统配备了两个电预热器，以确保热回收通风机中不会出现霜冻（ HRV)，并可以根据需要保持足够的通风。在 HRV 之后包括一个电加热器来控制送风温度。2018 年 12 月至 2019 年 2 月期间，测量了系统最低通风率 15.5 L/s 时 HRV、预热器和送风加热器的耗电量。通风系统中的相关温度也受到监控，以评估系统的性能。比较了 HRV 和整个系统的显着恢复效率 (SRE)。实验表明，平均而言，HRV 和系统的 SRE 分别为 72% 和 35%。两个月内通风系统的总能耗为 390 千瓦时，折算为 6.30 千瓦时/天，能耗强度为 0.27 千瓦时/平方米² / 天，或 12.25 Wh/m ³的室外空气供应。