scholarly journals The Contribution of IoT to the Implementation of Preventive Conservation According to European Standards: The Case Study of the “Cannone” Violin and Its Historical Copy

2021 ◽  
Vol 13 (4) ◽  
pp. 1900
Author(s):  
Chiara Manfriani ◽  
Giovanni Gualdani ◽  
Giacomo Goli ◽  
Bruce Carlson ◽  
Anna Rita Certo ◽  
...  
Keyword(s):  
Control System ◽  
Environmental Control ◽  
Environmental Parameters ◽  
Cost Effective ◽  
Climate Data ◽  
Indoor Climate ◽  
Efficient System ◽  
Preventive Conservation ◽  
European Standards

One of the main goals of preventive conservation (PC) is to reduce the risk of possible damage produced by the interaction between tangible heritage objects and their conservation environments. This work aims to introduce the European standard EN 15757:2010 as a potential tool for implementing effective museum PC, and it details the potential contributions of both active environmental control and Internet of Things (IoT) technologies in this regard. An application of this strategy is proposed by means of a case study of the conservation of two historical violins, part of a small but significant museum collection in the City of Genoa dedicated to Paganini, whose value is inestimable. According to the standard, monitoring of environmental parameters was carried out for more than four years in the Paganini Hall of Palazzo Doria-Tursi Museum. A remote-control system was implemented, installing digital sensors in the room and in the two showcases. The data were continuously collected through an integrated platform for supervision, monitoring and shared management, based on web-cloud-IoT technology. The analysis of climate data and the assessment of the “historic climate” led to the installation of an active control system on the display cases of the “Cannone” violin and its historical copy. The intervention resulted in a cost-effective improvement in the conservation conditions of the two objects, with an efficient system of warning and safety alarms and a protocol of resolution actions still active and ongoing. The application of IoT systems in monitoring and controlling the indoor climate of heritage collections facilitated the care of the objects at a cost reduction for the institution.

Assessment of Heat Exchanger Degradation in a Boeing 737-800 Environmental Control System

2021 ◽  
Vol 13 (6) ◽  
Author(s):  
Ian Jennions ◽  
Fakhre Ali
Keyword(s):  
Control System ◽  
Heat Exchangers ◽  
Environmental Control ◽  
Strong Association ◽  
Cost Effective ◽  
Fault Isolation ◽  
Air Conditioner ◽  
Simulation Methodology ◽  
Working Together ◽  
Critical Fault

Abstract There are a number of systems on an aircraft working together, in harmony, to produce safe and trouble free flight. The environmental control system (ECS) is one of these systems, and its failure is a major contributor to unscheduled maintenance, particularly in older aircraft. The ECS is composed of several complex sub-systems and components, but at its heart is the passenger air conditioner (PACK). The PACK is prone to degradation, which can lead to the functional failure of the ECS. Often its degradation is masked by the overall ECS control system and this can, ultimately, result in the ECS shutting down and extensive maintenance being required. There are a number of critical fault modes associated with the PACK, and in this paper, those modes associated with the primary and secondary heat exchangers (SHX) are explored. A robust ECS simulation framework called Simscape ECS simulation under all conditions (SESAC) has previously been implemented, calibrated, and tested against data from healthy systems. Here the simulations are extended to cover degraded components in a representative Boeing 737-800 aircraft PACK model. Fault modes such as blockage and fouling are assessed for the primary and secondary heat exchangers of the PACK. Simulation results, in terms of temperature, pressure, and mass flow at various degradation severities, are presented and discussed. The results highlight the interdependency between the PACK components and the strong association between the primary and secondary heat exchangers performance. The reported simulation methodology and findings serve as a further step towards the goal of formulating a cost-effective ECS fault isolation and diagnostic solution.

DESIGNING A SIMULATION BASED COST EFFECTIVE CONTROL SYSTEM FOR LOGISTICS MANAGEMENT OF ENTREPRENEURIAL STRATUPS: A CASE STUDY ON LOGISTIC FIRM

2017 ◽  
Vol 3 (02) ◽  
Author(s):  
Shwetank Parihar ◽  
Chandan Bhar
Keyword(s):  
Control System ◽  
Waiting Time ◽  
Lead Time ◽  
Model Development ◽  
Cost Effective ◽  
Literature Survey ◽  
Logistics Management ◽  
Effective Control ◽  
Simulation Based

The study develops a model based on simulation for logistics management. The author’sopinions are collected in the form of literature survey and major points of concern were collected and infused in the model development of the whole of the firm. The case study is of alogistics firm where the parameters are collected and then a simulation model is designed. The modelis designed on ARENA software. The parameters of the case industry are placed in the model and then it is simulated for over .1 million hours. The result shows that the lead time related problems leads to a large waiting time for the batches. This way the study helped in analyzing the risks and it involves the use of simulation for centrally monitoring the logistics management firm for fluctuations or risks.

scholarly journals Fuzzy Logic Based Environment Control of Operation Theatre

2021 ◽  
Vol 12 (1S) ◽  
pp. 220-232
Author(s):  
Sakshi Srivastav, Et. al.
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Fuzzy Logic Control ◽  
Fuzzy Logic Controller ◽  
Environmental Control ◽  
Environmental Parameters ◽  
Operation Theatre ◽  
Micro Particles ◽  
Logic Control ◽  
Environment Control

It is very critical and important to maintain the appropriate climatic conditions in the operation theatre. In paper, we present an approach to control total environmental conditions for the operation theatre. Generally for environmental control of operation theatre air conditioning system is installed. In operation theatre environmental parameters like humidity, temperature, oxygen and particles etc. have to be controlled precisely. All the environmental parameters are of nonlinear nature hence, difficult to control or model with the help of conventional control systems. Keeping in mind the complexity and nonlinearity of these parameters as fuzzy logic controller (FLC) for controlling all the environment of operation theatre has been designed. For this fuzzy logic control system temperature, micro particles, humidity & oxygen have been taken as input parameters and based on these parameters  speed of AC motor as well as the speed of exhaust motor are controlled. The control system is implemented with the help of different fuzzy rules and their membership functions derived from actual conditions. The performance of the system for control of operation theatre was studied and it has been observed that the result obtained with the fuzzy logic control system provides more effective and economical control. The fuzzy logic control system has been implemented using fuzzy Tech development tool.

Characterisation of air permeability of common ceiling linings and penetrations

2019 ◽  
Vol 37 (4) ◽  
pp. 448-460
Author(s):  
Stephan Harald Rupp ◽  
Manfred Plagmann
Keyword(s):  
Indoor Air ◽  
Design Methodology ◽  
Moisture Flux ◽  
Air Permeability ◽  
Test Facility ◽  
Air Leakage ◽  
Climate Data ◽  
Indoor Climate ◽  
Content Type

Purpose Air permeability of ceiling linings is an important element in understanding air and moisture flux from living spaces into the roof cavity. Ideally, these two spaces are decoupled to avoid transportation of moist indoor air into the attic space, where it can lead to condensation on the cold roof cladding. The purpose of this paper is to experimentally characterise the air permeability of a variety of common ceiling types. The results are given as leakage functions. Characteristic leakage data are also given for several ceiling penetrations. A case study illustrates the relevance of these data. Design/methodology/approach A specially designed test facility allows the installation of different ceiling types of up to 38 m2 in area. Laminar flow elements are used to measure the volumetric flow across the ceiling while recording the pressure difference. The experimental data are fitted to the leakage function equation Q =c (ΔP)n. Ceiling penetrations are characterised in a similar way. For the case studies estimating the transport of moisture into the roof cavity, indoor climate data have been obtained using humidity and temperature sensors. Findings Air leakage functions are given for a number of common ceiling linings and ceiling penetrations. These data can be used in simulations aimed at modelling moisture flux into the roof cavities. In the case study, the authors also give indoor climate data of residential dwellings in New Zealand. Originality/value This paper addresses the need for robust ceiling air permeability data in whole-house temperature and moisture transport simulations.

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