Implementation of a strategy for low-temperature operation of radiator systems using data from existing digital heat cost allocators. (15th July 2022)

• Record Type: Journal Article
• Authors: Benakopoulos, Theofanis; Tunzi, Michele; Salenbien, Robbe; Hansen, Kasper Klan; Svendsen, Svend
• Is Part Of: Energy. Volume 251(2022)
• Publication Date: 2022-07-15
• Subjects: Low-temperature district heating -- Digitalisation of heating systems -- Minimum supply temperature -- Control of radiator systems -- Error detection; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2022.123844
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Low-temperature district heating (LTDH) networks can integrate sustainable energy sources and waste industrial heat towards decarbonisation goals by 2050. LTDH networks can be realised through the low-temperature operation of heating systems in buildings. However, the low-temperature operation of heating systems is obstructed by inefficient radiator control by end-users or other technical errors. This study investigated the implementation of a strategy for low-temperature operation of radiator systems by calculating the minimum supply temperature and using an innovative treatment of data from electronic heat cost allocators to identify radiators not in use and locate the critical apartments with higher heat demands. According to the results, the low-temperature operation of radiator systems is possible. Although, the minimum supply temperature should be calculated based on the higher heat demand of the critical apartment identified to avoid complaints regarding poor thermal comfort. An energy weighted average supply temperature of 55 °C can be achieved, resulting in an average energy weighted return temperature of 31.3 °C in the system. Testing of a reduced supply temperature in the building case highlighted the existence of critical apartments. The investigation highlighted that the increased heat loss to the poorly heated neighbouring apartments heavily influences the critical apartments. Highlights: A Strategy for implementing a low-temperature operation of radiator system. Calculation of the minimum required supply temperature based on critical flats. Electronic heat cost allocators to detect errors in the system and critical flats. Stimulating the use of more radiators by the end-users. Heat loss to poorly heated neighbouring flats influences critical flats.