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The Development of Cloud Energy Management

Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Chunghwa Telecom, Data Communications Business Group, Taipei 10048, Taiwan
Foundation of Taiwan Industry Service, Taipei 10608, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Enrico Sciubba
Energies 2015, 8(5), 4357-4377;
Received: 27 January 2015 / Accepted: 4 May 2015 / Published: 14 May 2015
PDF [2923 KB, uploaded 14 May 2015]


The energy management service (EMS) has been utilized for saving energy since 1982 by managing the energy usage of site or facilities through the microprocessor, computer, Ethernet, internet, and wireless sensor network. The development and represented function groups of EMS are illustrated in the supplementary file of this paper. Along with this tendency, a cloud EMS, named the intelligent energy management network (iEN), was launched by Chunghwa Telecom in 2011 and tested during a pilot run from 2012 to 2013. The cloud EMS integrated three service modes together, including infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS). This cloud EMS could reduce the facility cost and enable a continuously improved service for energy conservation. From the literature review, 32 selected EMS cases of whole site and single facility were chosen for calculating the energy savings and payback rate. According to the literature, the average energy savings by applying EMS are 11.6% and 21.4% for the whole site and single facility, respectively. The iEN was applied on 55 demo sites with the similar scale, the same kind of machines and approaching conditions. The testing sites include a factory, a complex building, and a residual building, 12 lighting systems and 8 air conditioning systems. According to the testing results, the average energy savings by applying iEN are 10% and 23.5% for the whole site and single facility, respectively. Comparing with the reported EMS cases, it was found that the energy savings by adopting the cloud EMS were only 70%–80% compared with those using the traditional EMS. Although the cloud EMS presented less energy savings, it revolutionized the traditional EMS by its innovative business model. Compared with the averaged 1.7 years payback period of the traditional EMS, more than 70% of the cloud EMS cases could pay back immediately for the service fees and without the equipment investment. View Full-Text
Keywords: cloud energy management service (cloud EMS); intelligent energy management network (iEN); software as a service (SaaS); immediate payback cloud energy management service (cloud EMS); intelligent energy management network (iEN); software as a service (SaaS); immediate payback

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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MDPI and ACS Style

Cheng, C.-C.; Lee, D.; Wang, C.H.; Lin, S.F.; Chang, H.-P.; Fang, S.-T. The Development of Cloud Energy Management. Energies 2015, 8, 4357-4377.

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