Heating consumes almost 50% of the global final energy consumption but only 10% of the heat supply is from renewable energy sources (RES). Rooftop solar collectors generate low temperature heat, which can be stored as sensible heat over many months. This can lower the use of oil boilers in winters, thereby playing an important part in decarbonisation. This paper examines the feasibility of using tank thermal energy storage (TTES) for decarbonising heating. It simulates hourly energy flows and compares different heating systems in 50 and 200 dwellings in multi-family households at Geneva, Switzerland. Hourly energy flows for four different heating systems configrations, viz. oil boiler, solar collector with TTES, solar collector with TTES & heat pump, and a system having only a centralised air-water heat pump are simulated. Various performance indicators such as levelised cost of heat, percentage share of RES, peak electricity load and cost of decarbonisation are evaluated. Sensitivity of perfomance indicators to head demand, heat supply and heating network temperature is examined. Results show that a heating system having only a centralised air-water heat pump is the best option, but CO₂ emissions cannot be eliminated. On the other hand, in case of low heat demand (due to building renovation and lower heating network temperature in future), use of TTES with solar collectors could lead to a higher share of RES. Further, the peak electricity load is much lower and heating can be completely decarbonised. Thus, TTES has an important role to play in decarbonisation of heating, albeit at a higher cost.

采暖消耗了全球最终能源消耗的近50％，但仅10％的供热来自可再生能源（RES）。屋顶太阳能集热器会产生低温热量，这些热量可以作为显热储存多个月。这样可以在冬季减少燃油锅炉的使用，从而在脱碳中发挥重要作用。本文探讨了使用罐式热能储存器（TTES）进行脱碳加热的可行性。它模拟每小时的能量流，并比较瑞士日内瓦多户家庭中50户和200户住宅中的不同供暖系统。四个不同供暖系统配置的每小时能量流，即。模拟了燃油锅炉，带有TTES的太阳能集热器，带有TTES和热泵的太阳能集热器以及仅具有集中式空气-水热泵的系统。评估了各种性能指标，例如，均热成本，RES的百分比份额，高峰用电负荷和脱碳成本。检查了性能指标对水头需求，供热和加热网络温度的敏感性。结果表明，只有集中式空气-水热泵的供暖系统是最佳选择，但CO_2种排放无法消除。另一方面，在热量需求较低的情况下（由于建筑物翻新和未来供热网络温度降低），将TTES与太阳能收集器一起使用可能会导致更高的RES份额。此外，峰值电负荷要低得多，并且加热可以完全脱碳。因此，尽管成本较高，TTES在加热脱碳中仍具有重要作用。