Fall 2015 MECH 2311 INTRODUCTION to THERMAL FLUID SCIENCES

Total Page:16

File Type:pdf, Size:1020Kb

Fall 2015 MECH 2311 INTRODUCTION to THERMAL FLUID SCIENCES Fall 2015 MECH 2311 INTRODUCTION TO THERMAL FLUID SCIENCES Course An introduction to basic concepts of thermodynamics and fluid mechanics to Description include properties, property relationships, states, and fluids. Presentation of the basic equations of thermal-fluid science, continuity, and first and second laws of thermodynamics. Prerequisites are MATH 1312 Calculus II with a grade of “C” or better. Instructor Norman Love, PhD Assistant Professor Department of Mechanical Engineering E-mail address: [email protected] Office: Engineering (Annex) Building A-110 Office hours: F 0100 –0200 pm or by Appointment Office Phone: 915-747-8981 Textbooks Thermodynamics An Interactive Approach (2015) by Subrata Bhattacharjee Pearson ISBN-13: 978-0-13-035117-3 Fluid Mechanics (2015) by R.C. Hibbeler Pearson ISBN-13: 978-0-13-277762-9 These books can be purchased at the bookstore and will be used for the following classes: MECH 2311 Intro to Thermal Fluids MECH 3312 Thermodynamics MECH 3314 Fluid Mechanics Mastering MasteringEngineering is a service provided by the book publisher, Pearson. Engineering It is design to help you better understand course material and overall achieve a better grade in the class. If you have any questions with the sign-up please let me know. Please see the Registration Handout at the end of this syllabus or as a standalone document on BlackBoard. Here are some links to some helpful registration videos: Getting Started: https://www.youtube.com/watch?v=qZGkelldE3Y Registration: https://www.youtube.com/watch?v=c9PWBDRqfH4 You are required to purchase MasteringEngineering for the course, it is the medium by which I will assign and grade homework for the semester. If you buy the bundle of books through the bookstore, it will come with MasteringEngineering. If you have questions about Pearson Technical issues please follow these steps: 1. Review the Student Support FAQ page http://www.pearsonmylabandmastering.com/northamerica/students/su pport/index.html 2. If you cannot find your question in the FAQ, visit the site to contact Technical Support http://247pearsoned.custhelp.com/app/contact 3. If Tech Support does not resolve your issue, you may contact our dedicated Pearson rep: Shauntel Campos: [email protected] You MUST provide your Technical Support Ticket number in this email Course Content 0. Introduction to Thermodynamics and Fluid Mechanics 1. Basic Concepts of Thermodynamics a. Systems and Control Volumes b. State and Equilibrium c. Extensive and Intensive Properties d. Density and Specific Volume e. Velocity and Elevation f. Pressure (The Manometer, Gauge and Absolute) g. Zeroth Law of Thermodynamics and Temperature h. Stored Energy i. Flow Energy and Enthalpy j. Specific Heats k. Entropy l. Exergy 2. Balance Equations for Closed Systems a. Mass Balance b. Energy Transfer by Heat c. Energy Transfer by Work d. Mechanical Forms of Work e. Energy Balance f. First Law of Thermodynamics g. Entropy Balance h. Second Law of Thermodynamics i. Reversibility 3. Cycles: Closed Steady Systems a. Thermal Energy Reservoirs b. Heat Engines c. Refrigerators and Heat Pumps d. Reversible and Irreversible Processes e. The Carnot Cycle f. The Carnot Principles g. Thermodynamic Temperature Scale h. Carnot Heat Engine i. The Carnot Refrigerator and Heat Pump 4. Properties of Pure Substances a. Phases of a Pure Substance b. Phase-Change Processes of Pure Substances c. Quality and Interpolation d. Property Diagrams for Phase-Change Processes e. Thermodynamic Property Tables f. The Ideal-Gas Equation 5. Mass and Energy Analysis of Open Steady Systems a. Conservation of Mass b. Pipes, Ducts, and Tubes c. Nozzles and Diffusers d. Turbines e. Compressors, Fans, and Pumps 6. Introduction and Overview Fluid Mechanics a. Basic Fluid Properties b. Viscosity c. Vapor Pressure 7. Fluid Statics a. Introduction to Fluid Statics b. Hydrostatic Forces on Plane Surfaces c. Hydrostatic Force on a Curved Surface 8. Bernoulli and Energy Equations a. General Energy Equation b. The Bernoulli Equation c. Energy Analysis of Steady Flows Major Course Upon completion of this course, students should be able to: Objectives 1. Understand concepts of temperature, pressure, and energy 2. Evaluate properties of pure substances and use property data for solving problems 3. Apply the principles of conservation of mass and energy to closed and open systems 4. Understand and apply the second law of thermodynamics, including concepts such as entropy, irreversibility, and Carnot cycle 5. Understand the basic concepts of fluid mechanics and properties such as viscosity and surface tension 6. Solve fluid statics problems 7. Apply the Bernoulli and energy equations Grading Quizzes 100 Homework 260 100 Tests (4 given – 3 best will count) 300 Possible Points 500 A (500-450): B (449-400): C (399-350): D (349-300): F (299 and Below) There will be ten quizzes, nine homework assignments (plus 1 EC when you take the MasterEngineering tutorial), and four 80-minute tests. There will be no makeups for the tests or quizzes. Your lowest test grade will be dropped. Policy for You are allowed to discuss the problems with your classmates, tutors, or the Homework instructor, but do not copy homework from each other. You will do well in the class if you thoroughly understand all the problems you solved. Below describes how MasterEngineering will calculate your grade. Number of answer attempts per question is: 6 You gain credit for: • Correctly answering a question in a Part, Correctly answering a question in a Hint, Not opening a Hint (2% bonus) Hints are helpful clues or simpler questions that guide you to the answer. Hints are not available for all questions. There is no penalty for leaving questions in Hints unanswered. You lose credit for: • Exhausting all attempts or giving up on a question in a Part or Hint • Incorrectly answering a question in a Part or Hint Late submissions: receive no credit. Policy for Quizzes will be based on helping you study for both the Fundamental of Quizzes Engineering (FE) and Professional Engineering (PE) exams (http://www.ncees.org/exams/). I recommend that you use an approved calculator similar to what you will use for your certification exams for all your work since this will help you learn how to use all the features of your calculator. These calculators include Casio: All fx-115 models. Any Casio calculator must contain fx-115 in its model name, Hewlett Packard: The HP 33s and HP 35s models, and Texas Instruments: All TI-30X and TI-36X models. ABET Program This class significantly addresses the following ABET objectives: Outcomes (a) an ability to apply knowledge of mathematics, science, and engineering Impacted (b) an ability to design and conduct experiments, as well as to analyze and interpret data (e) an ability to identify, formulate, and solve engineering problems Academic dishonesty All graded materials must represent the student’s individual work. Scholastic dishonesty is the attempt of any student to present as his or her own work of another, or any work which he has not honestly performed, or attempting to pass any examination by improper means. Scholastic dishonesty is a serious offense and will not be accepted. Academic misconducts will be handled according to the current university policy. Reasonable Accommodation Policy: If you need classroom accommodation, please contact The Center for Accommodations and Support Services (CASS) at 915-747-5148, or by email to [email protected] , or visit the office located in UTEP Union East, Room 106. For additional information, please visit the CASS website at www.sa.utep.edu/cass. Department of Mechanical Engineering Safety Statement The Department of Mechanical Engineering at the University of Texas at El Paso is committed to a model of excellence in education that includes providing a safe and healthy environment for its students, staff, faculty and the general public. Our goal is to maximize education and research training that can only occur if you, the individual, minimize hazards and risks. This can be done by: • Providing adequate control of the health and safety risks arising from any and all activities; • Consulting with employees on matters affecting their health and safety • Providing and maintaining safe laboratories and equipment; • Ensuring safe handling and use of substance; • Ensuring all employees are competent to do their task and have adequate training; and • Maintaining clean, safe and healthy working conditions The principal investigator or individual in charge of each laboratory is ultimately responsible for safety in that respective lab. This includes training and ultimate release of the laboratory. Within the Department, we hold every employee (staff, faculty, student) responsible for implementing our safety practices and our departmental safety policy. We hold every employee (staff, faculty, student) responsible for providing leadership within our department to establish effective environmental safety and occupational health standards. TENTATIVE CLASS SCHEDULE MEETING TIME: MW 1200-120pm MEETING LOCATION: Physical Science Building 208 The following readings and HW assignments correspond to Thermodynamics An Interactive Approach (2015) Subrata Bhattacharjee Week Dates Chapter(s) Read Self Study Scheduled Sections Problems and DUE 1 08/24 0 – Intro 0.1, 0.1.4, 0.3 - 0.5, 0.1.10, 0.7 – 0.8 0.2.6, 0.4.1, HW problems 0.4.22 assigned on Mastering Engineering 08/26 1 – States and 1.1 – 1.5 1.1.8, are due the Properties 1.1.12, following 1.1.21, week 1.1.30, 1.1.44 2 08/31 2 – Balance 2.1 2.1.1, 2.1.2, HW Week 1 Equations for 2.1.9, 2.1.14 Due Closed Systems 09/01 By 500pm 09/02 2 – Balance 2.2 2.2.3, 2.2.7, Quiz 1 – 09/02 Equations for 2.2.9, Covering Closed Systems 2.2.18, Ch. 1 2.2.43, 2.2.44 3 09/07 HW Week 2 University - - - Due Closed 09/08 September 7 By 500pm Labor Day 09/09 2 – Balance 2.3 2.3.2, 2.3.3, Quiz 2 – 09/09 Equations for 2.3.10, Covering Closed Systems 2.3.16, Ch.
Recommended publications
  • Thermal Fluids, Also Known As Hot Oils, Heat Transfer
    THE RIGHT TOOLS FOR SUCCESS Edward Cass, Paratherm Heat Transfer Fluids, USA, evaluates top strategies for sustaining the performance of thermal fluids. hermal fluids, also known as hot oils, heat transfer efficiency and uptime of the system. Despite their fluids (HTFs), thermal oils, etc., are fluids used to established track record of enhanced safety, decreased generate high operating temperatures at low maintenance and improved temperature control over other system pressures. They are used in numerous heating technologies, thermal fluids are prone to Tapplications from manufacturing of plastics and wood, to degradation over time. However, there is a fine line food processing, tank heating, refinery processes and between fluid degradation and fluid failure. While fluid chemical synthesis. These manufacturing processes rely on degradation is inevitable, implementation of proper fluid a continuous, responsive heating system to maintain and system management strategies can help avoid costly production. Thermal fluids fuel these production processes fluid failure. Sustaining optimal efficiency and performance and therefore fluid quality plays a big role in the overall of the thermal fluid is largely dependent on implementing HYDROCARBON 1 December 2019 ENGINEERING operate predictably and efficiently with little to no unplanned downtime so long as good management strategies are followed. Strategy one – select the proper fluid to match the application requirements It is quite common to hear of the incorrect thermal fluid being used for a given application. One should beware of off-brand thermal fluids that are often re-labelled lubricant oils. In many cases, similar fluid chemistries may be used in Figure 1. HTF chemistry – mineral oils are complex mixtures of both the heat transfer and lubricant oil paraffinic, isoparaffinic, naphthenic and aromatic structures.
    [Show full text]
  • Classification of Machine Learning Frameworks for Data-Driven Thermal Fluid Models Chih-Wei Chang and Nam T
    Classification of Machine Learning Frameworks for Data-Driven Thermal Fluid Models Chih-Wei Chang and Nam T. Dinh Department of Nuclear Engineering North Carolina State University, Raleigh NC 27695-7909 [email protected], [email protected] Abstract Thermal fluid processes are inherently multi-physics and multi-scale, involving mass-momentum- energy transport phenomena at multiple scales. Thermal fluid simulation (TFS) is based on solving conservative equations, for which – except for “first-principles” direct numerical simulation – closure relations (CRs) are required to provide microscopic interactions or so-called sub-grid-scale physics. In practice, TFS is realized through reduced-order modeling, and its CRs as low-fidelity models can be informed by observations and data from relevant and adequately evaluated experiments and high-fidelity simulations. This paper is focused on data-driven TFS models, specifically on their development using machine learning (ML). Five ML frameworks are introduced including physics-separated ML (PSML or Type I ML), physics-evaluated ML (PEML or Type II ML), physics-integrated ML (PIML or Type III ML), physics-recovered (PRML or Type IV ML), and physics-discovered ML (PDML or Type V ML). The frameworks vary in their [physics.flu-dyn] performance for different applications depending on the level of knowledge of governing physics, source, type, amount and quality of available data for training. Notably, outlined for the first time in this paper, Type III models present stringent requirements on modeling, substantial computing resources for training, and high potential in extracting value from “big data” in thermal fluid research. The current paper demonstrates and investigates ML frameworks in three examples.
    [Show full text]
  • A Design-Oriented Approach to the Integration of Thermodynamics, Fluid Mechanics, and Heat Transfer in the Undergraduate Mechanical Engineering Curriculum
    DOCUMENT RESUME ED 452 048 SE 064 601 AUTHOR Whale, MacMurray D.; Cravalho, Ernest G. TITLE A Design-Oriented Approach to the Integration of Thermodynamics, Fluid Mechanics, and Heat Transfer in the Undergraduate Mechanical Engineering Curriculum. PUB DATE 1999-08-00 NOTE 13p.; Paper presented at the International Conference on Engineering Education (Ostrava, Prague, Czech Republic, August 10-14, 1999). AVAILABLE FROM For full text: http://www.ineer.org/Events/ICEE1999/Proceedings/papers/ 292/292.htm. PUB TYPE Reports Descriptive (141) Speeches/Meeting Papers (150) EDRS PRICE MF01/PC01 Plus Postage. DESCRIPTORS *Design Build Approach; Engineering Education; *Fluid Mechanics; *Heat; Higher Education; Integrated Activities; Teaching Methods; *Thermodynamics; *Undergraduate Study IDENTIFIERS *Massachusetts Institute of Technology ABSTRACT This paper describes two parallel efforts that attempt to implement a new approach to the teaching of thermal fluids engineering. In one setting, at the Massachusetts Institute of Technology (MIT), the subject matter is integrated into a single year-long subject at the introductory level. In the second setting, at Victoria (British Columbia, Canada), the design-oriented approach is used in the traditional separated presentation at a more advanced level where the material is focused on heat transfer. In both cases, the subject concludes with a design project thatsynthesizes the subject matter in the context of a real application. Itis concluded that the students are much more engaged, develop a greater senseof accomplishment, and are much more capable of analyzing complex problems (SAH) Reproductions supplied by EDRS are the best that can be made from the original document. U.S. DEPARTMENT OF EDUCATION Office of Educational Research and Improvement PERMISSION TO REPRODUCE AND D CATIONAL RESOURCES INFORMATION DISSEMINATE THIS MATERIAL HAS CENTER (ERIC) BEEN GRANTED BY is document has been reproduced as received from the person or organization originating it.
    [Show full text]
  • Enhanced Thermochemical Heat Capacity of Liquids: Molecular to Macroscale Modeling
    Nanoscale and Microscale Thermophysical Engineering ISSN: 1556-7265 (Print) 1556-7273 (Online) Journal homepage: https://www.tandfonline.com/loi/umte20 Enhanced Thermochemical Heat Capacity of Liquids: Molecular to Macroscale Modeling Peiyuan Yu, Anubhav Jain & Ravi S. Prasher To cite this article: Peiyuan Yu, Anubhav Jain & Ravi S. Prasher (2019) Enhanced Thermochemical Heat Capacity of Liquids: Molecular to Macroscale Modeling, Nanoscale and Microscale Thermophysical Engineering, 23:3, 235-246, DOI: 10.1080/15567265.2019.1600622 To link to this article: https://doi.org/10.1080/15567265.2019.1600622 View supplementary material Published online: 07 Apr 2019. Submit your article to this journal Article views: 177 View Crossmark data Full Terms & Conditions of access and use can be found at https://www.tandfonline.com/action/journalInformation?journalCode=umte20 NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING 2019, VOL. 23, NO. 3, 235–246 https://doi.org/10.1080/15567265.2019.1600622 Enhanced Thermochemical Heat Capacity of Liquids: Molecular to Macroscale Modeling Peiyuan Yu a, Anubhav Jaina, and Ravi S. Prashera,b aEnergy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; bDepartment of Mechanical Engineering, University of California, Berkeley, CA, USA ABSTRACT ARTICLE HISTORY Thermal fluids have many applications in the storage and transfer of Received 19 December 2018 thermal energy, playing a key role in heating, cooling, refrigeration, and Accepted 24 March 2019 power generation. However, the specific heat capacity of conventional KEYWORDS thermal fluids, which is directly linked to energy density, has remained Thermal fluids; relatively low. To tackle this challenge, we explore a thermochemical energy Thermochemical energy storage mechanism that can greatly enhance the heat capacity of base storage; Enhanced specific fluids (by up to threefold based on simulation) by creating a solution with heat; Density functional reactive species that can absorb and release additional thermal energy.
    [Show full text]
  • Development of an Integrated Thermal Fluids Engineering
    Session 1566 Development of an Integrated Thermal-Fluids Engineering Curriculum Richard N. Smith, Deborah A. Kaminski, Michael K. Jensen, and Amir Hirsa Department of Mechanical Engineering, Aeronautical Engineering, and Mechanics Rensselaer Polytechnic Institute Troy, NY 12180-3590 Abstract We present a new approach to teaching the core thermal/fluids curriculum for undergraduate programs in engineering. Traditional introductory thermodynamics, fluid mechanics, and heat transfer classes are being replaced with two integrated courses and an integrated laboratory course in which the three disciplines are taught simultaneously. The approach is intended to show interconnections and transferability of concepts and ideas, with an emphasis on the way they occur in engineering practice. Both courses are being taught in a new multimedia studio classroom, permitting student-student interactions, the use of in-class computer tools and examples, as well as individual desktop experiments and demonstration experiments. Our experiences in teaching through this innovative format, in using case studies to motivate student learning of introductory material, and in integrating the laboratory course experience to that of the studio classroom, are recounted. Introduction Fundamental changes in the core thermal-fluid science curriculum for engineers have been initiated at Rensselaer. We seek to improve the context in which material is presented, so that the physical intuition of our students is enhanced, their ability to think critically and to synthesize information is stimulated, and the relevance of the learning process to advanced analytical and computational tools available to the students is made clearer. This has been accomplished through the development of two distinct, but closely related, courses. The first course, Thermal and Fluids Engineering I (TF1), is a consolidation into a single four- credit course of the essential, fundamental aspects of classical thermodynamics, fluid mechanics and heat transfer, in a context consistent with engineering practice.
    [Show full text]
  • Paper 13. Fire and Explosion Hazards with Thermal Fluid Systems Alison
    SYMPOSIUM SERIES NO. 156 Hazards XXII # 2011 IChemE FIRE AND EXPLOSION HAZARDS WITH THERMAL FLUID SYSTEMS Alison McKay, PROjEN plc, UK Richard Franklin, Heat Transfer Systems Ltd, UK Incidents relating to thermal fluid systems are unfortunately more common than we might realise, and can be extremely serious. The fire and explosion hazards with thermal fluid systems have been re-emphasised by recent incidents. These incidents have a direct bearing on the estimated 4,000 UK companies that operate thermal fluid systems. Water or steam can be used as heat transfer fluids, but when high temperatures are needed organic fluids, which are capable of forming explosive atmospheres, are often used. Although fire and explosion hazards of low flash point flammable liquids are generally recognised, similar hazards with high flash point materials, such as thermal fluids, are often missed. These heat transfer fluids are often handled at temperatures above their flash point. The Health and Safety Executive recently issued a prohibition notice to a UK company following a major thermal fluid incident and significantly, following that incident, has identified thermal fluid systems as a fire and explosion hazard. There have been other serious incidents this year. Although not under HSE jurisdiction, there was a recent thermal fluid-related explosion and fire at a German panel products plant which tragically caused three fatalities. Most companies will be aware that any system that operates above the flash point of the thermal fluid falls under the “Dangerous Substances and Explosive Atmosphere” Regulations 2002 (DSEAR). However, many people are unaware that heat transfer fluids based on mineral oils degrade over time.
    [Show full text]
  • Integrating Thermodynamics and Fluid Mechanics Instruction: Practical Solutions to Issues of Consistency
    AC 2011-1826: INTEGRATING THERMODYNAMICS AND FLUID ME- CHANICS INSTRUCTION: PRACTICAL SOLUTIONS TO ISSUES OF CON- SISTENCY Bobby G Crawford, U.S. Military Academy Bobby Grant Crawford is a Colonel in the United States Army and the Director of the Mechanical En- gineering Program in the Department of Civil and Mechanical Engineering at the United States Military Academy, West Point, NY. He graduated from West Point with a B.S. degree in Mechanical Engineering in 1985. He holds MS and Ph.D. degrees in Aerospace Engineering, is a Senior Army Aviator in fixed and rotary wing aircraft, and is a licensed Professional Engineer. Daisie D. Boettner, U.S. Military Academy Colonel Daisie Boettner graduated from West Point in 1981 with a Bachelor of Science degree. She earned a Master of Science in Engineering (Mechanical Engineering) from the University of Michigan in 1991 and a Ph.D. in Mechanical Engineering from The Ohio State University in 2001. She has taught courses in thermal-fluid systems, heat transfer, and design. She is currently Professor and Deputy Head of the Department of Civil and Mechanical Engineering, United States Military Academy, West Point, NY. Page 22.917.1 Page c American Society for Engineering Education, 2011 Integrating Thermodynamics and Fluid Mechanics Instruction: Practical Solutions to Issues of Consistency Abstract Historically, the disciplines of fluid mechanics and thermodynamics have been taught as separate courses using separately developed textbooks. Most undergraduate students form an early belief that these two aspects of thermal-fluid science and engineering are as far removed from each other as cats are from dogs.
    [Show full text]
  • ME5B03 Advanced Thermal Fluid Sciences [10 ECTS]
    Module Code MEU55B03 Module Name Advanced Thermal Fluids Design ECTS Weighting 10 ECTS Semester taught Semester 2 Module Coordinator/s Associate Professor Anthony Robinson Module Learning Outcomes with On successful completion of this module, students should be able to: reference to the Graduate Attributes and how they are developed in LO1. Solve problems for practical and industrially relevant thermal discipline fluids applications. LO2. Analyse and generate closed mathematical models and/or simulations of heat transfer, fluid dynamic and thermodynamic systems. LO3. Apply design principles with bespoke engineering solutions to multidisciplinary problems with rigid constraints. LO4. Understand the dynamics of teamwork in the context of solving multifaceted problems with rigid constraints and timelines. LO5. Communicate in the form of technical reports and formal presentations. Graduate Attributes: levels of attainment To act responsibly - Enhanced To think independently - Enhanced To develop continuously - Enhanced To communicate effectively - Enhanced Module Content This module is developed to deepen the student’s understanding of heat and mass transfer as well as their capacity to solve complex engineering problems associated with real life thermal fluid systems. The module structure is primarily continuous assessment centred on problem-based learning. The group assignments and laboratory will pull together knowledge and understanding of thermodynamics, fluid mechanics and heat transfer together with other core areas of mechanical and
    [Show full text]
  • Understanding Your Heat Transfer Fluid by Ed Thacker, Interstate Chemical Co
    . Understanding Your Heat Transfer Fluid by Ed Thacker, Interstate Chemical Co. Inc. Posted: July 1, 2007 Knowing what type of fluid to use and how to maintain it properly can help you ensure efficient, trouble-free operation of your process cooling equipment. One of the most frequently encountered problems in process cooling operations is equipment component failure due to the use of incorrect or improperly maintained heat transfer fluids. Using the right fluid and implementing a regular analysis and maintenance program are therefore essential to ensuring efficient equipment operation. The most common heat transfer fluids used in process cooling are water, brine, alcohol, ethylene glycol and propylene glycol. All of these fluids have advantages and disadvantages. The selection usually depends on the type of equipment, the operating temperature range, the geographic location and cost. Water is inexpensive and provides the best heat transfer properties; however, it is limited by its temperature range. It is used in many southern locations where freeze protection is not generally a concern. Brines provide good heat transfer but are extremely corrosive and tend to form scale. Brines have high maintenance costs and are not recommended for use with copper or aluminum. Alcohols provide good freeze protection and have a low viscosity at low temperatures. Methanol and ethanol are the most commonly used types and need to be blended with water. Alcohols are flammable and have low flashpoints, and the vapors can be toxic. Propylene glycol has low toxicity and can be used where incidental food contact could occur or where a spill could contaminate drinking water.
    [Show full text]
  • Overview of Thermal Fluid Heaters
    What do these items have in common? Overview of Thermal Fluid Heaters 83rd General Meeting of the National Board Presented by Melissa Wadkinson, PE Purpose • Compared to Power Boilers and Heating Boilers, there are a limited number of installations of thermal fluid heaters. • Minimal guidance is available on these heaters and systems. • Jurisdictions vary in how these heaters and systems are regulated. Overview • Description of a thermal fluid system • Comparison of thermal fluid to steam • Critical system components • System and safety considerations • Installation • Codes and Standards What is a thermal fluid system? • Thermal fluid (also known as hot oil) systems may be liquid or vapor. ▫ Vapor phase systems may either incorporate a heater in which vaporization of the fluid takes place within the vessel, or a flooded heater where the fluid is vaporized externally through a flash drum. Vapor systems with condensing vapor provide a uniform heat source than liquid phase systems. ▫ A liquid phase thermal fluid system uses a flooded pressure vessel (heater) in which the heat transfer media (fluid) is heated but no vaporization takes place within the vessel. Closed loop systems which may be open or closed to the atmosphere Similar in concept to hot water boiler systems Vapor Phase System Typical Hot Oil Heat Transfer System Designed to Operate at Atmospheric Pressure Design Features • Heaters are commonly direct-fired by combustion of a fuel, or electric resistance elements can be used. • Heater design may be similar to a fire-tube boiler, electric resistance heated boiler, or a water tube boiler. • Heaters may operate at temperatures up to 750⁰F depending on the process requirements and fluid selection.
    [Show full text]
  • Thermal-Fluids Laboratory Project: First and Second Law Analysis of a Thermoelectric Cooler*
    Int. J. Engng Ed. Vol. 16, No. 6, pp. 529±533, 2000 0949-149X/91 $3.00+0.00 Printed in Great Britain. # 2000 TEMPUS Publications. Thermal-Fluids Laboratory Project: First and Second Law Analysis of a Thermoelectric Cooler* ERIC B. RATTS Department of Mechanical Engineering, The University of Michigan-Dearborn, 4901 Evergreen Rd., Dearborn, MI 48128, USA. E-mail: [email protected] A thermal engineering laboratory/design project is presented.The objective of the project was to construct an experiment to measure the performance of a heat pump based on first and second law principles.A thermoelectric device drove the heat pump.A student lab group selected, analyzed, designed, planned, built, instrumented, and tested this experiment.The students calculated the coefficient of performance of the system and compared it to the Carnot COP.In addition they calculated a second law efficiency based on entropy generation.The aim of this senior level laboratory project was not only to strengthen their understanding of principles, but also to initiate critical thinking on their own.The experiment was a success, because they applied knowledge from their undergraduate education: thermodynamics, heat transfer, fluid mechanics, electric circuits, instrumentation and design principles. NOMENCLATURE The course ME 378 at The University of Michigan-Dearborn, is a senior level required COP coefficient of performance mechanical engineering course. In this course the L length students review thermodynamic, fluid mechanics Nu Nusselt number and heat transfer principles by performing a Pr Prandtl number variety of thermal-fluid lab experiments. During Q_ heat transfer rate, (kW) the last part of the course, the lab groups are Re Reynolds number to demonstrate a principle through planning, S_ entropy transfer rate, (kW/K) designing, constructing and testing an experiment.
    [Show full text]
  • Thermal Fluids As a Kiln Heating Medium
    THERMAL FLUIDS AS A KILN HEATING MEDIUM Peter Neild Carroll-Hatch Ltd. North Vancouver, British Columbia This discussion today is about heat transfer. More specifi- cally, the discussion is about transferring heat into lumber dry kilns, and perhaps even more specifically, it is about the medium we use to carry the heat into the kiln. There are four well-known methods of heating a lumber dry kiln, as follows: 1. "Direct-Fired" Duct the products of combustion directly into the kiln itself. 2. Steam Heat water in a boiler and pipe the steam into the heat exchange coils in the kiln. 3. Hot Water Heat water to a temperature below its boiling point, and pump the hot water into the heat exchange coils in the kiln. 4. Thermal Fluid Heat thermal fluid (in much the same type of heater as the Hot Water System in 3 above), and pump the thermal fluid into the heat exchange coils in the kiln. It is the last class of heat transfer medium, Thermal Fluid, that we will concentrate on today. The basic operation of a kiln heating system using Thermal Fluid as the heat transfer medium is very simple. The oil is simply pumped around the circuit. The pump pumps the oil through the heater where it is heated up, say, from 400°F (204°C) to 500°F (260°C). Then it is piped to the lumber dry kiln where it flows through heat transfer coils, where it gives up some heat. As an example, the kiln could cool the thermal fluid from 500°F (260°C) to 400°F (204°C) while flowing through the coils.
    [Show full text]