Abstract: This report will show the acquired understanding of the refrigeration cycle by using first and second laws of thermodynamics. In order to analyze this system several assumptions where made such like an isentropic process at the compressor an isenthalpic expansion in the throttling valve. Diagrams will be provided to depict these thermodynamic processes in addition to computing the heat transferred to the system and the work input to the compressor. Table of Contents Abstract .
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czyET 3200 – Engineering Thermodynamics Homework Assignment #6 Due June 15‚ 2013 @ 5:00 PM Problem 4.8 - A Home Heat Pump for Space Heating We wish to do a preliminary thermodynamic evaluation of a 1kW input power home heat pump system for space heating using refrigerant R134a. Consider the following system flow diagram Thus the heat pump system absorbs heat from the evaporator placed outside in order to pump heat into the air flowing through the insulated duct over the condenser section
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HERIOT WATT UNIVERSITY SCHOOL OF ENGINEERING AND PHYSICAL SCIENCES DEGREE OF BENG IN MECHANICAL ENGINEERING First Year Mechanical Engineering Science 3 ??day ?? June 2007 ??:?? – ??:?? Answer TWO questions from each section A & B. Section A Q1. a) For a Newtonian fluid state an expression for the shear stress. [4 marks] b) An ice hockey puck traverses the ice on a thin sheet of water. A puck struck by an ice hockey player Initially travels
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[pic] |College of Engineering and Computer Science Mechanical Engineering Department Mechanical Engineering 370 Thermodynamics | | | |Fall 2010 Course Number: 14319 Instructor: Larry Caretto | Unit Three Homework Solutions‚ September 16‚ 2010 1 A classroom that normally contains 40 people is to be air conditioned with window air conditioning units of 6 kW cooling capacity. A person at rest may be assumed to dissipate
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Thermodynamics- Enthalpy of Reaction and Hess’s Law Objectives: 1. To calculate the heat of reaction of a given reaction using the concepts derived from Hess’s Law. Pre-lab Questions: 1. Define Heat of Reaction. The enthalpy change associated with the completion of a chemical reaction. 2. Define Specific Heat. The energy it takes to raise the temperature of 1 gram of a substance by one degree Celsius. 3. Calculate the heat of reaction assuming no heat is lost to the calorimeter. Use correct
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Thermodynamics-Enthalpy of Reaction and Hess’s Law Purpose To demonstrate the principle of Hess’s Law and to find the heat capacity of the coffee cup calorimeter using three different reactions. Data Tave = (46.4-45.2)/2 = 45.8 qwater = -(100g)(4.184)(46.56-45.8) = -318 J Ccal = 318J/(46.56-21.2) = -12.53J/g*C Tinitial = (27.1+23.8)/2 = 25.45 qrxn = -(100g)(4.18)(38.43-24.45)+(-12.53x12.98) =-5400J/.1mol(1J/1000kJ) = -54.0 kJ/mol Tinitial = (26.0-24.5)/2 qrxn =-(100g)(4
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Thermodynamics and Thermochemistry The study of energy and its transformations is known as thermodynamics. Thermochemistry is the branch of thermodynamics that relates to chemical reactions and energy changes involving heat. Most thermochemical studies are conducted in a laboratory where the transfer of heat can be carefully monitored in a closed system. The measurement of heat transfer is called calorimetry. The device in which heat transfer is measured is called a calorimeter. A calorimeter can
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CHEMICAL LABORATORY EXPERIMENTS FOR (EP 205/EG207) LABORATORY MANUAL Lecturer/Instructor: Name: Student ID: Course: FACULTY OF ENGINEERING‚ ARCHITECTURE & BUILT ENVIRONMENT UCSI UNIVERSITY 2013 TABLE OF CONTENT General Instructions Experiment 1 Experiment 2 Experiment 3 Experiment 4 Experiment 5 Experiment 6 Isentropic Expansion Process Brief Depressurization The Fundamental Pressure-Temperature Relationship of Saturated Steam in Equilibrium Determination of Ratio of Volume Determination
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Short Essays on Thermodynamics 1. The two ways of transferring heat are Conduction and Radiation: Heat conduction‚ also called diffusion‚ is the direct microscopic exchange of kinetic energy of particles through the boundary between two systems. When an object is at a different temperature from another body or its surroundings‚ heat flows so that the body and the surroundings reach the same temperature at thermal equilibrium. Conduction happens in both fluids and solids. Thermal radiation‚
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A Layman’s Explanation of Two Laws of Thermodynamics Energy is encountered in many forms‚ such as mechanical‚ chemical (food and fuel)‚ electrical‚ nuclear‚ heat‚ and radiant (light). Energy has the ability to bring about change or to do work. Thermodynamics is the study of energy. The field of thermodynamics studies the behavior of energy flow in natural systems. These studies have rendered two laws of thermodynamics. The first law of thermodynamics is also known as the law of conservation of
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