What question did this study set out to answer?

To evaluate the impact of customer-side hydraulic reconfigurations and optimized pump control on lowering district heating return temperatures while ensuring supply reliability.

August 16, 2026Energy ReportsOpen Access

Hydraulic optimizations for customer-side return temperature reduction to district heating networks

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To evaluate the impact of customer-side hydraulic reconfigurations and optimized pump control on lowering district heating return temperatures while ensuring supply reliability.
Calibrated a building simulation model using measured consumption load profiles from multi-residential buildings.
Modeled and compared baseline performance against minor hydraulic adjustments with optimized pump control and a serial cascade system (domestic hot water followed by space heating).
Minor hydraulic modifications combined with optimized pump control reduced the energy-weighted yearly mean return temperature by 6.6 K (from 53.5°C measured to 46.9°C).
The serial cascade configuration reduced the yearly mean return temperature by 12.2 K to 41.3°C without compromising heat supply reliability.

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Implication

Simulation study demonstrates substantial return temperature reductions via pump control and cascade hydraulics in multi-residential buildings, indicating improved district heating efficiency.

Cite This Study

Forndran et al. (2026) studied this question.

synapsesocial.com/papers/6a81796af2fb91fc834ac7e3 https://doi.org/10.1016/j.egyr.2026.109592

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Implication

Simulation study demonstrates substantial return temperature reductions via pump control and cascade hydraulics in multi-residential buildings, indicating improved district heating efficiency.

Hydraulic optimizations for customer-side return temperature reduction to district heating networks

Key Points

Discussion

Implication

Cite This Study

Hydraulic optimizations for customer-side return temperature reduction to district heating networks

Key Points

Discussion

Implication

Cite This Study

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