Design of a hybrid space heating system for residential buildings in cold climate regions

天然气鼓风炉是 ** 阿尔伯塔的独户、复式和联排房屋的主要热源。然而，熔炉的能量效率通常较低。空气源热泵（ASHP）技术 ** 在气候温和地区因其节能环保的优点而被广泛接受。**然而，ASHP的效率随温度而降低。电阻加热器是作为一个 ** 备份，以满足家庭的加热需要，在极端寒冷的天气。然而，在像阿尔伯塔这样的地方，从电力中获得1 ** 单位的热量的成本是天然气的2-3倍，导致家庭运营的水电费和温室气体排放量并没有下降。混合空间供暖系统的原理是让 **ASHP在温和的日子里工作，而在寒冷的日子里使用天然气炉。建筑业迫切需要在寒冷地区的住宅中采用混合空间供暖系统。在这方面，拟议项目旨在通过以下方式提供技术解决方案：（1）确定在空气源热泵和炉子之间切换的临界 ** 温度，以最大限度地减少 ** 家庭运营中的水电费和温室气体排放;以及（2）为不同类型的住宅 ** 建筑物确定空气源热泵和炉子混合系统的正确尺寸。

Natural gas forced-air furnaces are the major heating sources for single-family, duplex and row houses in**Alberta. However, the energy efficiency of furnaces is normally low. Air source heat pump (ASHP) technology**is widely accepted for the merits of energy-saving and environmental protection in the mild climate zone.**However, the efficiency of ASHP decreases with temperature. An electrical resistance heater is used as a**backup to meet home's heating needs in extremely cold weather. However, in places like Alberta, obtaining one**unit of heat from electricity costs 2-3 times more than from natural gas, leading to that the utility bill and GHG**emissions from home operations do not go down. The principle of a hybrid space heating system is to let an**ASHP work in mild days while using natural gas furnaces in cold days. There is an immediate demand for**building industry to make a hybrid space heating system feasible for residential applications in cold climate**zone. In this regard, the proposed project aims to provide a technical solution by (1) determining of the critical**temperature to switch between ASHP and furnaces in order to minimize the utility bill and GHG emissions in**home operations; and (2) right sizing the ASHP and furnace hybrid system for different types of residential**buildings.