• Controllability of buildings: computing and managing energy in practice

      Khalid, Yousaf; University of Chester (Journal of Computing and Management Studies (JCMS), 2018-05-25)
      Modern buildings utilise multiple systems for energy generation, supply and storage in order to maintain occupant comfort. Consequently, complex computer based energy management systems are utilised for design and operation of such buildings. Often these buildings perform poor in practice in terms of energy consumption, cost and carbon emissions due to lack of thorough analysis of their controllability during the design process. This paper highlights the deficiencies in the current building design practice and the need for appropriate framework to assess controllability of buildings during design stages so that complex building energy systems are easier to manage in practice.
    • Programmable logic controllers and Direct digital controls in Buildings

      Khalid, Yousaf; University of Chester (2018-09-30)
      The concept of programmable logic controller (PLC) originated over the last century that has revolutionised the industrial sector. In the last few decades PLC in the form of DDC has been commonly used in Building Energy Management Systems (BEMS). The contribution of this work is to analyse PLC/DDC role in the ongoing BEMS advancements in the building sector. Currently DDC are not understood by building design and simulation engineers who assess the controllability of the building in practice. This paper would enhance the understanding of integrating DDC in buildings and influence creation of better modelling and simulation tools for assessing their impact on energy performance in practice.