Search results for " Induced malfunction"

showing 2 items of 2 documents

On Thermoeconomic Diagnosis of a Fouled Direct Expansion Coil: Effects of Induced Malfunctions on Quantitative Performance of the Diagnostic Technique

2017

Thermoeconomic diagnosis represents a promising technique for the detection of common faults in refrigeration systems, which are responsible of degradation in their energetic performance. Recently, the authors have carried out a sensitivity analysis of the performance of this method to the thermodynamic conditions of inlet air and to the geometry of the direct expansion coil, in case of degradation induced by evaporator fouling. The analysis showed that the method is able to detect this fault, but sometimes its quantitative assessments are not satisfactory. In order to understand more in-depth the origin of such results and identify margins for refinement of the technique, this paper is aim…

EngineeringEngineering drawingThermoeconomic diagnosis;Evaporator fouling;Direct expansion coil;Exergy;Malfunction cost;Fuel impact;Induced malfunction;Intrinsic malfunction020209 energyEnergy Engineering and Power TechnologyMechanical engineering02 engineering and technologyEnvironmental Science (miscellaneous)lcsh:Technologylcsh:HD72-88lcsh:Economic growth development planningFuel impactThermoeconomic diagnosisThermoeconomic diagnosis Evaporator fouling Direct expansion coil Exergy Malfunction cost Fuel impact Induced malfunction Intrinsic malfunctionSettore ING-IND/10 - Fisica Tecnica Industriale0202 electrical engineering electronic engineering information engineeringInduced malfunctionExergyWater Science and TechnologyRenewable Energy Sustainability and the Environmentbusiness.industryDirect expansion coillcsh:TIntrinsic malfunction.Electromagnetic coilEvaporator foulingMalfunction costbusinessJournal of Sustainable Development of Energy, Water and Environment Systems
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Thermoeconomic Diagnosis of Air conditioning Systems: an Innovative Approach for Improved Reliability of the Technique

2018

Thermoeconomic diagnosis is an exergy-based fault detection and diagnosis technique which has been recently extended to air conditioning systems. One of the main features of this technique is to provide quantitative information of the impact of each fault on the increased energy consumption of a system. This information is then used for programming cost-effective maintenance strategies. Only few papers have focused on it and a lot of work is needed for further improvements. In this work, the approach was developed by means of experimental activities carried out on a 17.5 kW packaged rooftop air conditioning unit (RTU). The RTU was tested in psychrometric chambers under a wide range of opera…

Fault Detection and Diagnosis Thermoeconomic Diagnosis air conditioning system exergy induced malfunction.Settore ING-IND/10 - Fisica Tecnica Industriale
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