Latest revision as of 10:55, 16 February 2021

Abstract

In the case study "West-Flanders" costs of electricity and heat production are estimated if a dedicated biogas grid using pipelines would be implemented to centralize energy production in a region. Heat may not be used effectively at digester sites, e.g. because of a change in treatment of digestate. A large scale centralized combined heat and power (CHP) engine can produce additional electrical power at a hub, i.e. central collection point, and has lower specific costs compared to decentralized CHPs at digester sites. A biogas transport model is used to calculate transport costs in a grid. These costs, partly balanced by a scale advantage in CHP costs, are attributed to the additional electrical energy (80%) and heat (20%) produced. If the hub is at a digester site, costs of additional electricity can be as low as 4.0 (sic)ct kWh(e)(-1) and are in many cases below 12 (sic)ct kWh(e)(-1), i.e. in the same order of magnitude or lower than costs of electricity from biogas produced using separate CHPs at the different digester sites; costs of heat at the hub show to be lower than 1 (sic)ct kWh(th)(-1) assuming an effective heat use of 50%. In case a hub is situated at a location with high potential heat demand, i.e. a heat sink, transport of biogas from one digester only to a central located hub can provide 3.4 MWth of heat at 1.95 (sic)ct kWh(th)(-1). For such a centrally located hub additional electrical energy costs show to be slightly higher, but with three or more digesters these costs are lower than 20 (sic)ct kWh(e)(-1) and heat costs are around 0.5 (sic)ct kWh(th)(-1). With a centralized hub more renewable energy is produced, i.e. a more efficient use of biomass feedstock. It is concluded that costs for additional electricity and heat can be at a competing level and scale advantages in a CHP can be a driver to collect biogas at a hub using a biogas grid. (C) 2019 Elsevier Ltd. All rights reserved.

Original document

The different versions of the original document can be found in:

• http://dx.doi.org/10.1016/j.renene.2019.12.009

• https://www.rug.nl/research/portal/en/publications/potential-advantages-in-heat-and-power-production-when-biogas-is-collected-from-several-digesters-using-dedicated-pipelines--a-case-study-in-the-province-of-westflanders-belgium(abdb2322-b307-441d-9df1-5db716596fdf).html

• https://api.elsevier.com/content/article/PII:S0960148119318798?httpAccept=text/xml,

https://api.elsevier.com/content/article/PII:S0960148119318798?httpAccept=text/plain,

http://dx.doi.org/10.1016/j.renene.2019.12.009 under the license https://www.elsevier.com/tdm/userlicense/1.0/

• https://www.sciencedirect.com/science/article/pii/S0960148119318798,

https://www.narcis.nl/publication/RecordID/oai%3Apure.rug.nl%3Apublications%2Fabdb2322-b307-441d-9df1-5db716596fdf,

https://pubag.nal.usda.gov/catalog/6786249,

https://academic.microsoft.com/#/detail/2992523153