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Building energy management systems in building’s retrofit using power lines

Dolianitis S., Kolokotsa Dionysia, Kalitsounakis N., Zografakis N.

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Summary

The aim of the specific paper is the analysis of the efficiencyof power lines as a communication media forBuilding Energy Management Systems. The reason behindthis scope is the ability of power lines to be installedin existing buildings without extra wiring.Building Energy Management Systems (BEMS) constitutea part of automation systems. BEMS implementcontrol the indoor environmental parameters while minimizingenergy consumption. This work aims to analyzethe ability of installing Building Energy ManagementSystems (BEMS) in any building while simultaneouslyimprove the energy efficiency and the indoor comfort.The easiest and most economic way to construct a BEMSin an existing building is to use the existing technologiesof the building. These are power lines and LocalArea Networks (LANs). Another way to develop andimplement BEMS is radio frequencies (RF). These technologiescan be used to existing buildings because theyneed no wiring and the installation cost is very small.Before choosing the devices that will formulate theBEMS, the parameters that affect the indoor conditionsmust be determined. Those are thermal comfort, visualcomfort, indoor air quality and acoustic comfort.In order to check the efficiency of communication protocolsthat use power lines as a mean to communicate,a test installation is implemented in laboratory. Thisinstallation is performed via two development kits: thePower Line Development Support Kit (PL DSK) andMini Evaluation Kit (Mini EVK). The test included atemperature sensor as a controlled variable and a decentralisedheating control system with a central heatingunit for the control signal.The results of the testing as well as specifications forinstallation in existing buildings are described focusingon disseminating such technologies in meeting the continuouslyincreasing energy demands of the buildings inCrete, Greece

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