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Increasing energy efficiency in bakery ovens

August 11, 2023
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Increasing energy efficiency of the gases production process in bakery ovens

Chelmenciuc Corina | Thermal Power Engineering and Energetics Management Department

Technical University of Moldova

Abstract.  The current work presents the solution of increasing energy efficiency of the processes of obtaining gases, used as heat carrier for baking processes in tunnel type ovens, by integration of cogeneration. A comparative energetic analysis was carried out between the processes of obtaining gases in bakery ovens and those with integrated cogeneration. The evaluation of energy efficiency, of the proposed technical solution, is based on drawing up the energy balance of processes, the one with gases production in the combustion chamber of classic bakery oven and that of the internal combustion engine. The evaluation of energy efficiency of the classical gas production process in the tunnel type oven is based on experimental data whereas the efficiency of method proposed in this work is based on theoretical data. The energetic analysis was performed in order to demonstrate that the integration of a cogeneration installation in bakery ovens contribute to reducing losses in the processes of obtaining gases, thus increasing the energy efficiency.

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Evensong “My Life Flows On in Endless Song”

August 10, 2023
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Bibliography: Climate “Change”

August 9, 2023
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Where There is Smoke…There Doesn’t Have to be Fire

August 9, 2023
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The ASTM International business model features a strong product certification component and a weaker interoperability component therefore we place ASTM titles at lower priority in our coverage of the best practice literature that supports our safety and sustainability agenda.  Nevertheless, leading practice discovery and promulgation processes for product certification bears a strong similarity to the processes that provide the structure for interoperability standards.

Today we select a Case Study from ANSI’s Committee on Education which is relevant to today’s fire safety colloquium; open to everyone.

ASTM Fire Standards and Flammability Standards

WHERE THERE IS SMOKE… THERE DOESN’T HAVE TO BE FIRE: FIRE-SAFETY AND ASTM E2187

ANSI Committee on Education: Questions and Answers

We hope quick access to this content will encourage students and faculty to participate in the annual ANSI Student Paper Competition, sponsored by ANSI’s Committee on Education in which we are a member.  We meet again in July and will determine the winner(s) the 2021 competition and select a topic for the 2022 competition.  We are happy to explain further during today’s colloquium.  At any time you may communicate directly with Lisa Rajchel (lrajchel@ansi.org).

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2023 Student Paper Competition

 

 

 

Border Collie Optimization

August 9, 2023
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Border Collie Optimization

University Institute of Technology, Burdwan, India
CHRIST (Deemed to be University), Bengaluru, India
Sukanta Mahavidyalaya, Jalpaiguri, India
FEECS, VSB-Technical University of Ostrava, Ostrava, Czech Republic

 

Abstract:  In recent times, several metaheuristic algorithms have been proposed for solving real world optimization problems. In this paper, a new metaheuristic algorithm, called the Border Collie Optimization is introduced. The algorithm is developed by mimicking the sheep herding styles of Border Collie dogs. The Border Collie’s unique herding style from the front as well as from the sides is adopted successfully in this paper. In this algorithm, the entire population is divided into two parts viz., dogs and sheep. This is done to equally focus on both exploration and exploitation of the search space. The Border Collie utilizes a predatory move called eyeing.

This technique of the dogs is utilized to prevent the algorithm from getting stuck into local optima. A sensitivity analysis of the proposed algorithm has been carried out using the Sobol’s sensitivity indices with the Sobol g-function for tuning of parameters. The proposed algorithm is applied on thirty-five benchmark functions. The proposed algorithm provides very competitive results, when compared with seven state-of-the-art algorithms like Ant Colony optimization, Differential algorithm, Genetic algorithm, Grey-wolf optimizer, Harris Hawk optimization, Particle Swarm optimization and Whale optimization algorithm. The performance of the proposed algorithm is analytically and visually tested by different methods to judge its supremacy. Finally, the statistical significance of the proposed algorithm is established by comparing it with other algorithms by employing Kruskal-Wallis test and Friedman test.

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Wiring Fire Prevention in Hospitals

August 8, 2023
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Fondazione Policlinico Universitario Agostino Gemelli / Rome, Italy

Localized fire ignition hazard in branch circuits, cords and connected equipment

Electrical Engineering Department, Sapienza Università di Roma
Italian National Fire Department

Abstract.  In electrical power systems, the fire ignition can be originated by incident energy of faults. Faults involve overheating, arcing and burning for all the wiring exposed to mechanical damage and other insulation stresses especially wiring connected by flexible cords and cables. The mechanical damage of the stranded bare conductors can degrade the effective sizing of the total cross section, causing anomalous conditions of local overcurrent. To highlight the local incident energy in case of fault, the parameters steady current and transient current densities can assist in analyzing the event. The conductors size reduction, degrading locally the thermal withstand capability, makes ineffective the protection coordination amplifying the anomalous effect of current no detectable adequately by overcurrent protective devices. The faulted cords remain so energized and present electric shock and fire hazards. Generally and especially in strategic buildings as hospitals, preventing ignition is better than promptly extinguishing. An efficient protection can be achieved by integration of active and passive techniques : by adoption of the special device Arc-fault Circuit Interrupter (AFCI) that recognize the arcing; by wiring the circuits, particularly extension cords, with Ground-Fault-Forced Cables, GFFCs, that convert faults into ground faults easily protected by ground fault protective devices (GFPDs).

Fondazione Policlinico Universitario Agostino Gemelli / Rome, Italy

 

 

Product Standards for Plugs and Receptacles

August 8, 2023
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Manufacturers retain testing laboratories and related conformance organizations — Nationally Recognized Testing Laboratories — to assure their products meet safety (and sometimes sustainability) standards. Today we will examine the certification catalog of a legacy, and familiar name in the electrical device domain.  At a patient’s bedside in a hospital or healthcare setting, various electrical loads or devices may be present to provide medical care, monitoring, and comfort. Some of the common electrical loads found at a patient’s bedside include:

Hospital Bed: Electric hospital beds allow for adjustments in height, head position, and leg position to provide patient comfort and facilitate medical procedures.

Patient Monitor: These monitors display vital signs such as heart rate, blood pressure, oxygen saturation, and respiratory rate, helping healthcare professionals keep track of the patient’s condition.

Infusion Pumps: These devices administer medications, fluids, and nutrients intravenously at a controlled rate.

Ventilators: Mechanical ventilators provide respiratory support to patients who have difficulty breathing on their own.

Pulse Oximeter: This non-invasive device measures the oxygen saturation level in the patient’s blood.

Electrocardiogram (ECG/EKG) Machine: It records the electrical activity of the heart and is used to diagnose cardiac conditions.

Enteral Feeding Pump: Used to deliver liquid nutrition to patients who cannot take food by mouth.

Suction Machine: It assists in removing secretions from the patient’s airway.

Warming Devices: Devices like warming blankets or warm air blowers are used to maintain the patient’s body temperature during surgery or recovery.

Reading Lights: Bedside lights that allow patients to read or perform tasks without disturbing others.

Television and Entertainment Devices: To provide entertainment and alleviate boredom during the patient’s stay.

Charging Outlets: Electrical outlets to charge personal electronic devices like smartphones, tablets, and laptops.

It’s important to note that the specific devices and equipment present at a patient’s bedside may vary depending on the level of care required and the hospital’s equipment standards. Additionally, strict safety measures and electrical grounding are essential to ensure patient safety when using electrical devices in a healthcare setting.  

We have been tracking the back-and-forth on proposals, considerations, adoption and rejections in the 3-year revision cycles of the 2023 National Electrical Code and the2021 Healthcare Facilities Code.  The documents listed below are frequently referenced in both NFPA 70 and NFPA 99:

UL 498 Landing Page

Standard for Attachment Plugs and Receptacles 

Hospital Plug Load

Collaborative Standards Development System

Tune!FM

August 7, 2023
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Tune!FM is our very own, student-driven radio station, located at our Armidale campus.  Our high-power, open narrowcasting service is operated by the legendary team from UNE Life alongside dedicated UNE students.  The station services the University, our students globally, UNE staff and the greater Armidale community.”

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