Mechanical Engineering / Makina Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/4129

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2004 - 200912010 - 20191

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Subject: search.filters.subject.Performance indices

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  • Article
    Citation - WoS: 11
    Citation - Scopus: 11
    A New Stiffness Performance Index: Volumetric Isotropy Index
    (MDPI, 2019) Görgülü, İbrahimcan; Dede, Mehmet İsmet Can
    A new index for a precise calculation of a manipulator's stiffness isotropy is introduced. The proposed index is compared with the conventionally used stiffness isotropy index by making use of the investigation on R-CUBE manipulator. The proposed index is shown to produce relatively more precise results from which a higher number of isotropic poses are detected.
  • Article
    Citation - WoS: 55
    Citation - Scopus: 67
    Evaluating Performance Indices of a Shopping Centre and Implementing Hvac Control Principles To Minimize Energy Usage
    (Elsevier Ltd., 2004) Canbay, Çağlar Selçuk; Hepbaşlı, Arif; Gökçen Akkurt, Gülden
    Heating, ventilating and air-conditioning (HVAC) systems in buildings must be integrated with an efficient control scheme to maintain comfort under any load conditions. Efficient HVAC control is often the most cost-effective option to improve the energy efficiency of a building. However, HVAC processes are non-linear, and characteristics change on a seasonal basis so the effect of changing the control strategy is usually difficult to predict. The present study aims to reduce energy consumption by defining new HVAC control strategies and tuning control loops in a shopping centre. First, an energy audit was performed to investigate the potential for energy savings and to redefine the control scenarios, while a methodology for the shopping centre was developed. Performance indices were then calculated and compared with the yardsticks. Next, normalised performance indices were computed to reach out a better understanding of the building's efficiency. Finally, new strategies were implemented with the help of the existing building management system (BMS) and about 22% of energy saving was achieved.