Design of solar district heating system with seasonal thermal energy storage in northern China and its economic analysis

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A solar district heating system design achieved a solar fraction of 36.32% and supplied 48,378 GJ of heat annually.
Economic analysis revealed a net present value rate of 5.37% with a static payback period of 13 years.
Sensitivity analysis indicated that heating price, construction investment, and heating costs are key factors affecting feasibility.
The study suggests optimizing returns by increasing heating prices, reducing construction costs, or improving solar fraction.

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This analysis reveals economic feasibility of solar heating systems with thermal energy storage, highlighting significant cost factors.

Huang et al. (2025) studied this question.

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