With the increasing amount of building renovations in Austria, the potential increases for replacing conventional national gas heating systems with heat pumps (HP) and thereby reduce CO₂ emissions particularly when combined with solar photovoltaics (PV). The Austrian subsidization scheme for HP and PV systems are different for every state, creating confusion and inconstancy for potential adopters. This study provides a parametric techno-economic analysis of PV + HP systems to identify the critical economic parameters on profitability and make policy recommendations. A case study in Vienna is modelled using demand from the Building Model Generator and black box efficiency models for the HP and PV simulated with hourly time steps. The results show that both air-source and ground source heat pumps are currently profitable with PV under current subsidy schemes. The benefit-to-cost ratio (BCR) is highly influenced by capital costs and subsidies, however natural gas prices have the greatest influence. Increasing natural gas prices by 0.01 €/kWh, or 17%, is enough to replace all other complicated subsidies for both HP and PV. This is equivalent to a carbon emissions price of 33 €/ton and could result in a reduction of CO₂ emissions in multi-family houses by approximately 45%–60%.

随着奥地利建筑翻新量的增加，用热泵 (HP) 取代传统的国家燃气供暖系统从而减少 CO ₂的潜力增加尤其是与太阳能光伏 (PV) 结合使用时。奥地利对 HP 和 PV 系统的补贴计划因州而异，给潜在采用者造成了混乱和不稳定。本研究提供了 PV + HP 系统的参数化技术经济分析，以确定盈利能力的关键经济参数并提出政策建议。维也纳的一个案例研究是使用建筑模型生成器的需求以及每小时时间步长模拟的 HP 和 PV 的黑盒效率模型进行建模的。结果表明，在当前的补贴计划下，空气源热泵和地源热泵目前都可以通过光伏获利。收益成本比 (BCR) 受资本成本和补贴的影响很大，但天然气价格的影响最大。天然气价格上涨0。01 €/kWh，即 17%，足以取代 HP 和 PV 的所有其他复杂补贴。这相当于 33 欧元/吨的碳排放价格，并可能导致二氧化碳的减少₂多户住宅的排放量大约减少 45%–60%。