Publication
Title
Hydronic design of cogeneration in collective residential heating systems : state-of-the-art, comparison and improvements
Author
Abstract
Cogeneration (CHP) has great potential to save primary energy in collective residential buildings. However, these savings and their associated financial benefits are influenced by the design of the complete heat production system, which typically includes, besides the CHP itself, an auxiliary boiler and a storage tank. Both scientific literature and design guides focus little on the hydronic aspects of that design, although the performance of a heat production system is extremely prone to it. Therefore, this paper evaluates different hydronic designs of a central heat production system with CHP. First, an overview is given of the state-of-the-art hydronic design concepts that are used in the private sector. Two new concepts are proposed as improvements to the existing ones: one to integrate the CHP and one to integrate the boiler. A morphological chart is developed to classify the features of both the conventional and novel designs. Second, the performance of all the design concepts (and their 54 combinations) are evaluated based on a case study of an apartment block with 24 apartments. This evaluation is made by means of dynamic building system simulations. The results show that maximal primary energy can be saved if the CHP is integrated according to the novel CHP design, which allows a variable flow rate through the CHP. This concept should be preferred in a design process. Multiple hydronic configurations of the boiler, of which one is the novel hydronic boiler concept, resulted in a similar performance. Therefore, designers are advised to make a case-specific comparison to decide which one to take. The morphological chart and methodology elaborated in this paper provide a basis to make that decision.
Language
English
Source (journal)
Applied thermal engineering: design, processes, equipment, economics. - Oxford
Publication
Oxford : 2019
ISSN
1359-4311
Volume/pages
148 (2019) , p. 1246-1257
ISI
000460845100119
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 05.12.2018
Last edited 06.09.2021
To cite this reference