Using common household thermal storages to support the PV- and battery system in nearly zero energy buildings in off-grid mode
- This paper investigates the use of common thermal storage systems for demand side management in off-grid situations for nearly zero energy buildings. Typical parameters and characteristics were analyzed to develop mathematical models for freezers, water heaters and space heating/cooling. The models used in this work are based on simplified equations derived from differential equations. Simplified models of a battery storage and a PV-system have been added. Models for the thermal storages, PV-system and battery storage were merged to one system model. All models and simulations were designed and conducted with Matlab. Various pre-defined price based set point calculation algorithms were modified to work with the off-grid system based on the system’s voltage and available PV-power. Voltage and battery’s state of charge based algorithms are developed in this work. In a system with a freezer, water heater and space heating/cooling that is powered by a PV-system only, a possible battery storage capacity reduction of up to 50% with PV-powerThis paper investigates the use of common thermal storage systems for demand side management in off-grid situations for nearly zero energy buildings. Typical parameters and characteristics were analyzed to develop mathematical models for freezers, water heaters and space heating/cooling. The models used in this work are based on simplified equations derived from differential equations. Simplified models of a battery storage and a PV-system have been added. Models for the thermal storages, PV-system and battery storage were merged to one system model. All models and simulations were designed and conducted with Matlab. Various pre-defined price based set point calculation algorithms were modified to work with the off-grid system based on the system’s voltage and available PV-power. Voltage and battery’s state of charge based algorithms are developed in this work. In a system with a freezer, water heater and space heating/cooling that is powered by a PV-system only, a possible battery storage capacity reduction of up to 50% with PV-power based and up to 36% with SOC based algorithms compared to the same system with fixed set point thermostatic control could be achieved. Additionally, the capacity could even be reduced by up to 18% by solely reacting to voltage drops.…
Author: | Tobias Häring, Argo RosinORCiD, Helmuth Biechl |
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DOI: | https://doi.org/10.1016/j.seta.2019.05.014 |
Identifier: | 2213-1388 OPAC HS OPAC extern |
Parent Title (English): | Sustainable Energy Technologies and Assessments |
Publisher: | Elsevier |
Place of publication: | Amsterdam |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2019/06/04 |
Year of first Publication: | 2019 |
Tag: | Demand side management; Off-grid; Renewable energy; Thermal storage; nZEB |
Volume: | Volume 35 |
Issue: | October 2019 |
Number of pages: | 13 Seiten |
First Page: | 12 |
Last Page: | 24 |
Institutes: | Fakultät Elektrotechnik |
IEES - Institut für Elektrische Energiesysteme | |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 60 Technik |
6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften | |
Research focus: | FSP1: Energie |
Publication Lists: | Biechl, Helmuth |
Publication reviewed: | begutachtet |
Release Date: | 2020/09/14 |