Results 11 to 20 of about 130,301 (298)
Optimal usage of low temperature heat sources to supply district heating by heat pumps [PDF]
, 2017 This paper presents a theoretical study on the optimal usage of different low temperature heat sources to supply district heating by heat pumps. The study is based on data for the Copenhagen region. The heat sources were prioritized based on the coefficient of performance calculated for each hour.
Pieper, Henrik +3 more
openaire +3 more sources
Energies, 2021 This work aims at developing a methodology for the assessment of district heating (DH) potential through the mapping of energy demand and waste heat sources. The presented method is then applied to the Metropolitan City of Milano as a case study in order
Giulia Spirito +5 more
doaj +1 more source
Energies, 2022 The manuscript analyses the management of low and ultra-low-temperature district heating systems (DHS) coupled with centralised and decentralised heat pumps.
Riccardo Toffanin +3 more
doaj +1 more source
Feasibility of a booster for DHW circulation in apartment buildings
Energy Reports, 2021 With increasing focus on the performance of district heating systems, a concept is developed to obtain low district heating return temperatures from domestic hot water systems with a high share of circulation loss. For these systems, it is challenging to
Jan Eric Thorsen +4 more
doaj +1 more source
Energy Reports, 2022 The campus of Tallinn University of Technology consists of 26 buildings with a total annual heat demand of approximately 20 GWh. A local natural gas-fired boiler provides annually approximately 13 GWh of heating to 12 buildings in the campus and 14 ...
Pauli Hiltunen +4 more
doaj +1 more source
Handbook of Low Temperature District Heating
, 2022 This book reviews the history and evolution of district heating networks, with a focus on current and future issues of the district heating sector. Novel developments in the field of low temperature district heating are studied, limitations for safe operation and avoidance of bacteria are considered, and the associated improved performance of the ...
Garay-Martinez, Roberto +1 more
openaire +2 more sources
Comparison of 4th and 5th generation district heating systems [PDF]
E3S Web of Conferences, 2021 In a pursuit to increase the efficiency of district heating system there has been a continuous focus to reduce the system operating temperatures. This has led to the current state of the art district heating systems, commonly referred to as the 4th ...
Gudmundsson Oddgeir +2 more
doaj +1 more source
Cascade sub-low temperature district heating networks in existing district heating systems
Smart Energy, 2022 Existing district heating networks (DHNs) are often designed for relatively high temperatures, typically 80–120 °C supply and 40–60 °C return. The transformation of such high-temperature DHNs (HTDHNs) into more efficient low-temperature DHNs (LTDHN) and towards the 4th generation DHNs is associated with great complexity and effort. This paper discusses
Anna Volkova +6 more
openaire +2 more sources
Data-driven assessment for the supervision of District Heating Networks
Energy Reports, 2022 There is an ongoing trend towards temperature reduction in District Heating Networks, allowing for the reduction of distribution heat loss and enabling the integration of low exergy heat production systems.
Olaia Eguiarte +4 more
doaj +1 more source
Energies, 2021 The operation of typical domestic hot water (DHW) systems with a storage tank and circulation loop, according to the regulations for hygiene and comfort, results in a significant heat demand at high operating temperatures that leads to high return ...
Theofanis Benakopoulos +4 more
doaj +1 more source