Article (Scientific journals)
A general methodology for optimal load management with distributed renewable energy generation and storage in residential housing
Georges, Emeline; Braun, James; Lemort, Vincent
2016In Journal of Building Performance Simulation
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Keywords :
net metering; optimal control; heat pump
Abstract :
[en] In the US, buildings represent around 40% of the primary energy consumption and 74% of the electrical energy consumption [U.S. Department of Energy (DOE). 2012. 2011 Buildings Energy Data Book. Energy Efficiency & Renewable Energy]. Incentives to promote the installation of on-site renewable energy sources have emerged in different states, including net metering programmes. The fast spread of such distributed power generation represents additional challenges for the management of the electricity grid and has led to increased interest in smart control of building loads and demand response programmes. This paper presents a general methodology for assessing opportunities associated with optimal load management in response to evolving utility incentives for residential buildings that employ renewable energy sources and energy storage. An optimal control problem is formulated for manipulating thermostatically controlled domestic loads and energy storage in response to the availability of renewable energy generation and utility net metering incentives. The methodology is demonstrated for a typical American house built in the 1990s and equipped with a single-speed air-to-air heat pump, an electric water heater and photovoltaic (PV) collectors. The additional potential associated with utilizing electrical batteries is also considered. Load matching performance for on-site renewable energy generation is characterized in terms of percentage of the electricity production consumed on-site and the proportion of the demand covered. For the purpose of assessing potential, simulations were performed assuming perfect predictions of the electrical load profiles. The method also allows determination of the optimal size of PV systems for a given net metering programme. Results of the case study showed significant benefits associated with control optimization including an increase of load matching between 3% and 28%, with the improvement dependent on the net metering tariff and available storage capacity. The estimated cost savings for the consumer ranged from 6.4% to 27.5% compared to no optimization with a unitary buy-back ratio, depending on the available storage capacity. Related reduction in CO2 emissions were between 11% and 46%. Optimal load management of the home thermal systems allowed an increase in the optimal size of the PV system in the range of 13–21%.
Disciplines :
Energy
Author, co-author :
Georges, Emeline ;  Université de Liège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Braun, James;  Herrick Laboratories - Purdue University
Lemort, Vincent  ;  Université de Liège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Language :
English
Title :
A general methodology for optimal load management with distributed renewable energy generation and storage in residential housing
Publication date :
August 2016
Journal title :
Journal of Building Performance Simulation
ISSN :
1940-1493
eISSN :
1940-1507
Publisher :
Taylors and Francis
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 August 2016

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