Numerical Simulation of the Effects of Oil Gun Location and Oil Feed Rate on Coal Ignition and Burner Wall Temperature in a Tiny Oil Ignition Burner

To solve the overheating problem of tiny oil ignition burners’ walls during the firing-up process in a 330 MWe tangentially pulverized coal-fired boiler, a numerical model of a tiny oil ignition burner was carefully built considering combustion, gas–solid flow, and heat transfer. Then, the burner location and oil feed rate were optimized based on the model to prevent the burner’s walls from overheating. The effects of the oil gun extension distance (100, 200, 300, 400, 500 mm) and oil feed rate (160, 140, 120, 100, 80, 70, 60 kg/h) on coal ignition performance and burner wall temperature were carefully investigated. The simulation results showed good agreement with the measured results. The results indicated that decreasing the oil gun distance within the burner diminished the flame length of the co-combustion of oil and pulverized coal, thus lowering the burner wall temperature. Decreasing the oil feed rate appropriately could also reduce the burner wall temperature without influencing the ignition performance. Considering both ignition performance and burner wall temperature, an extension of 400 mm of the oil gun location and an oil feed rate of 160 kg/h were successfully applied to the actual operation without adverse effects. Moreover, it is suggested to move the temperature monitor points from the burner upper wall to the burner side wall.

Apps-Based Temperature Monitoring System with Location Services for Medical Needs Delivery Using Drone

Traditional temperature monitoring system for blood delivery requires a USB cable to extract data after delivery has been completed. Without real-time temperature data during delivery, the quality of the products cannot be monitored efficiently. In this paper, we have designed and developed a mobile application-based temperature monitoring system for medical needs delivery. It has a mobile application to display temperature data in real-time. The system includes Arduino Uno, DHT22, DS3231, microSD card adapter and ESP8266 Wi-Fi module. The temperature and humidity data were stored in the microSD card and ThingSpeak server for further analysis. A mobile application allowed users to visualized and monitor the temperature of the payload during delivery. For the system test and evaluation purpose, the developed temperature monitoring system was placed inside a polystyrene box. The temperature and humidity data were acquired using DHT22 and Fluke t3000 fc in cold and ambient temperature for 30 minutes with a sampling time of 2 seconds in the polystyrene box. The results showed that the correlations error 0.96 and 1.00, respectively. Finally, we showed that the developed temperature monitoring system can capture and record temperature data in real-time. It is reliable and comparable to a high-end temperature monitor.

Use of blood temperature monitor with Twister device for the surveillance of vascular access in maintenance hemodialysis: Comparison with Doppler ultrasonography

Background: Regular monitoring of vascular access in patients on maintenance hemodialysis is important to detect early vascular access complications. We compared vascular access blood flow determined by blood temperature monitor and Doppler ultrasonography to evaluate the usefulness of blood temperature monitor. Methods: In total, 70 patients on maintenance hemodialysis were enrolled from three dialysis centers. Vascular access blood flow was measured thrice at 6-month intervals using Doppler ultrasonography to determine arterial inflow (Q-DUa), venous outflow (Q-DUv), and flow between punctures (Q-DUb) using BTM® (Q-BTM). Twister® was placed between the hemodialysis needle and blood lines, allowing simple reversal of flow without stopping the hemodialysis pump. Results: In total, 203 measurements were recorded, with median values (interquartile range) for Q-BTM, Q-DUa, Q-DUv, and Q-DUb of 1139.0 (868.0–1588.0) mL/min, 960.3 (658.7–1380.4) mL/min, 946.0 (552.0–1515.0) mL/min, and 1067.7 (544.8–1635.0) mL/min, respectively. For all measurements, the mean intraclass correlation coefficients were 0.52 (95% confidence interval, 0.36–0.64) for Q-DUa; 0.37 (95% confidence interval, 0.15–0.53) for Q-DUv; and 0.45 (95% confidence interval, 0.26–0.59) for Q-DUb. Analysis of a receiver operating characteristics curve yielded a cut-off of 627 mL/min for Q-BTM to predict stenosis. Conclusion: In patients on maintenance hemodialysis, blood flow measured by blood temperature monitor moderately correlated with Doppler blood flow. It was more related to arterial inflow than venous outflow or flow between punctures. The blood temperature monitor method was not inferior to Doppler ultrasonography. Therefore, blood temperature monitor could be recommended for routine vascular access monitoring because it can be done quickly without interrupting dialysis.

Evaluation of a continuous neonatal temperature monitor for low-resource settings: a device feasibility pilot study

ObjectiveEvaluate a novel continuous temperature monitor in a low-resource neonatal ward.DesignWe developed a low-cost continuous neonatal temperature monitor (NTM) for use in low-resource settings. Accuracy of NTM was initially assessed in the laboratory. Clinical evaluation then was performed in a neonatal ward in a central hospital in Malawi; eligible neonates (<1 week of age) were recruited for continuous temperature monitoring with NTM and a Philips Intellivue MP30 Patient Monitor.Interventions and outcome measuresThe temperature probes of NTM and the reference patient monitor were attached to the infant’s abdomen, and core temperature was continuously recorded for up to 3 hours. Axillary temperatures were taken every hour. We compared temperatures measured using NTM, the patient monitor and the axillary thermometer.ResultsLaboratory temperature measurements obtained with NTM were within 0.059°C (range: −0.035°C to 0.195°C) of a reference thermometer. A total of 39 patients were recruited to participate in the clinical evaluation of NTM; data from four patients were excluded due to faulty hardware connections. The mean difference in measured temperatures between the NTM and the Intellivue MP30 was −0.04°C (95% CI −0.52°C to 0.44°C).ConclusionNTM meets ISO 80601-2-56 standards for accuracy and is an appropriate, low-cost continuous temperature monitor for neonatal wards in low-resource settings.Trial registration numbersNCT03965312 and NCT03866122.

Stima della portata della fistola artero-venosa mediante termodiluizione nei pazienti in emodialisi cronica: esperienza monocentrica.

Purpose: Vascular access surveillance in hemodialysis is today an important challenge for nephrologist. Low blood flow is a risk factor for development of thrombosis of native fistula or graft. The aim of the study is to evaluate the correspondence between flow measurement by thermodilution and Color Doppler, and to identify flow rate values using the Blood temperature monitor (BTM) method in the case of stenosis. Methods: We evaluated 29 patients on chronic hemodialysis. The evaluation of blood flow with BTM were performed during the first hour of the hemodialysis session. All patients underwent a color doppler of vascular access within 10 days from the BTM measurements. Results: The mean vascular access flow calculated with BTM resulted 1142 ± 700 ml/min and there was a correlation with color doppler data 1199 ± 644 ml/min (p=0,0001 r=0,829). The flow of patients with hemodynamically significant stenosis was 332 ± 92 ml/min with a minimum value of 270 ml/min and a maximum value of 440 ml/min. Conclusion: the correspondence between thermodilution and color doppler support the implementation of intradialitic evaluation of the vascular access blood flow with the BTM method. Thermodilution allows to identify earlier patients with high risk of vascular access failure and the need for further diagnostic and therapeutic investigations.

IoT Based Heart Attack Detection, Heart Rate and Temperature Monitor

The Internet of Things (IoT) is inter communication of embedded devices using networking technologies. The IoT will be one of the important trends in future; can affect the networking, business and communication. In this paper, proposing a remote sensing parameter of the human body which consists of pulse and temperature. The parameters that are used for sensing and monitoring will send the data through wireless sensors. Adding a web based observing helps to keep track of the regular status of patient. The sensing data will be continuously collected in a database and will be used to inform patient to any unseen problems to undergo possible diagnosis. Experimental results prove the proposed system is user friendly, reliable, economical. IoT typically expected to propose the advanced high bandwidth connectivity of embedded devices, systems and services which goes beyond machine –to – machine (M2M) context. The advanced connectivity of devices aide in automation is possible in nearly all field. Everyone today is so busy in their lives; even they forget to take care of their health. By keeping all these things in minds, technology really proves to be an asset for an individual. With the advancement in technology, lots of smart or medical sensors came into existence that continuously analyzes individual patient activity and automatically predicts a heart attack before the patient feels sick.