M. Thirumarimurugan

Comparison of fault detection and isolation methods: A review

Fault Detection and Isolation (FDI) is important in many industries to provide safe operation of a process. To determine the kind, size, location and time of fault, many Fault detection and Identification (FDI) Techniques are proposed. The Characteristic of FDI techniques include robustness, fast detection and isolation of faults. In this paper a comparison of fault diagnosis system based on Artificial Neural Network (ANN), Observer, Fuzzy, Kalman filter is presented. To achieve fault detection and isolation, a set of residuals need to be determined. Residual indicates the state of the system and provide information about the source of possible faults. A comparison of residual generation methods such as observer based residual generation, parity relation, Kalman filter and structural analysis is also presented in this paper.

Removal of Chromium from Synthetic Tannery Effluent by Using Bioadsorbents

Several low cost biomaterials such as rice husk,saw dust and eucalyptus bark (EB) were tested for removal of chromium. All the experiments were carried out in batch process with laboratory prepared samples. The adsorbent, which had highest chromium(VI) removal was EB. Influences of chromium concentration, contact time on removal of chromium from effluent was investigated. The adsorption data were fitted well by Langmuir isotherm. The maximum removal of Cr(VI) was observed at pH 2. Adsorption capacity was found to be 45 mg/g of adsorbent, at Cr(VI) concentration in the effluent being 200mg/l,250 mg/l. The results indicate that eucalyptus bark can be used for the removal of chromium.

Modeling and control of plate type heat exchangers using PI and PID controllers

The Heat exchanger is a significant system that are used in process, manufacturing and production industries. In present days the system developed should be effective and work in the most efficient way and must be energy saving. This enables us to concentrate on the field of heat exchangers where the energy processing happens. The consistent monitoring and control of temperature improves the performance and the heat transfer rate of the heat exchanger. Here in this paper the designed controllers are studied for plate type heat exchanger for controlling the outlet fluid temperature to their desired set point irrespective of sudden disturbance or nonlinearity of the process.

An analysis on modeling and optimal control of the heat exchangers using PI and PID controllers

In this paper the dynamic behaviour of the heat exchangers are studied using different control strategies. By experimentation the dynamic behaviour of the outlet cold water temperature for the change in hot water flow rate are observed and the values are simulated using MATLAB and the results are compared. The conventional PI and PID are implemented and the control strategies along with the tuning procedures such as ISE, IAE, ITAE are observed and the design fitness of the heat exchangers are analyzed for effective control of the process there by improving the performance and the heat transfer rate of the heat exchanger irrespective of sudden disturbance or nonlinearity of the process

Metaphorical analysis of tuning rules for PI and PID controllers in modeling an automatic drug delivery system to control mean arterial blood pressure

Drug Delivery System are the devices that is used to deliver the drugs or medicines into the human body at a particular rate for a given time period. These systems are widely used in cardiovascular surgical treatments and Intensive Care Units (ICU). The drugs that are used during treatments are mainly used to control the blood pressure. Control of such drugs during surgeries and in ICU are very tedious since manual control by anaesthetist are done which is not accurate and takes time. Thus an Automatic Drug Delivery System (ADDS) is developed to overcome this issue. An ADDS is modeled mathematically for different conditions from the real-time data obtained and control mechanisms are implemented. The aim work of the controllers is to control the rate of drug that is injected into the body which in turn controls the blood pressure and reduces complications during surgeries and post surgical treatments. This paper aims at correlating the various tuning rules such as ISE, IAE and ITAE tuning for PI and PID controllers and simulating their responses.

Experimental Studies on Electrochemical and Photo Oxidation of Effluent Containing Ethyl Benzene and Optimization Using RSM

In this paper, comparative studies were carried out on electrochemical and photo oxidation processes to degrade the synthetic effluent containing ethyl benzene. The electrochemical oxidation was carried out in galvanostatic mode with lead oxide as anode and a stainless steel plate as the cathode in the presence of 2 g/L of NaCl has been added as a supporting electrolyte. The electrochemical treatment was optimized by response surface methodology (RSM), which results in 73.42 % was the highest percentage of COD removal, and the optimum conditions were satisfied at current density 1.82 A/dm 2 , time 2 h, flow rate 10 l/h, volume 3.63 L occurs at minimum power consumption 15 kWh/kg COD. It was followed by the photo oxidation process was carried out in the presence of Ultra Violet radiation emitted from Ultra Violet source was investigated. From the study, it was observed that percentage of COD reduction, and Biodegradability Index was found to be the maximum of 98.42 % and 0.712 respectively, the optimized irradiation time was 45 minutes for pretreated effluent has been investigated. This combined method appears to be a promising technology and has potential application for environmental remediation.

Heat Transfer Studies on Packed Bed Using Non Newtonian Fluid

This project aims to study and compare the heat transfer characteristics for Counter-current flow and Parallel Flow through Packed Bed by determining the overall heat transfer coefficient, effectiveness, cold side efficiency and hot side efficiency for water-water system and Carboxymethylcellulose (CMC)-water system with various compositions on volume basis. In Packed Bed, the inlet temperatures of both hot and cold fluids are maintained constant. In performance analysis the flow rate of cold fluid was varied from 3 lpm to 8 lpm for both water-water system and CMC-water system. The flow rate of hot fluid was maintained constant for both water-water system and CMC-water system. In this work the composition of the CMC-water system were varied from 0.05% to 0.20% on volume basis. The experiments were carried out for both parallel and counter current flow pattern, compared and reported. A physical model was developed using dimensional analysis and fitted with the experimental data. Simulation studies were done using this physical model and compared with the experimental values. The simulation studies were found to agree well with the experimental results.