Modeling a PCM storage unit for solar thermal cooling in Masdar City

Slides:

Advertisements

Similar presentations

Heat, is in physics, energy transferred from one part of a substance to another, or from one body to another, by virtue of a difference in temperature.

Advertisements

Chapter 11 HEAT EXCHANGERS

INTRODUCTION. Seminar on IMPROVEMENT OF THERMAL EFFICIENCY BY RECOVERY OF HEAT FROM IC ENGINE EXHAUST.

Lecture 15: Capillary motion

Basic Refrigeration Cycle

Chapter 2 Introduction to Heat Transfer

Thermal Capacity Specific Heat Capacity Melting & Boiling Condensation & Solidification.

Determining Q values, Heat of Fusion, and Building a One Tank Thermal Storage System Dustin Meaux Louise High School Louise ISD Faculty Mentor: Dr: Cable.

Chapter 1: Introduction and Basic Concepts

Class 4a: Atmospheric moisture. Introduction to water Earth’s temperature  special properties of water.

MuCool Absorber Review meeting FermiLab, Chicago 21 – 22 February 2003 Fluid Flow and Convective Heat Transfer Modelling by Wing Lau & Stephanie Yang Oxford.

MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003 How Liquid Hydrogen behaves thermally in a Convective Absorber by Wing Lau,

Fluid Mechanics 06. Energy, Work and Power Work:- Work is force acting through a distance when the force is parallel to the direction of motion. Energy:-

Liquid Argon in a Large Tank --- Some Thermodynamic Calculations Zhijing Tang November 4, 2004.

Convection Convection: transfer of heat by a flowing liquid or gas

Supervised by : Dr. mohammad fahim Eng. Yousef ali Yaqoub bader ali.

Introduction to Heat Transfer

THE QUANTITY OF HEAT The thermal energy lost or gained by objects is called heat. One calorie (cal) is the quantity of heat required to change the temperature.

Heat Exchanger & Classification Prepared by: Nimesh Gajjar

Bryan Picou James Roberts Advisor: Dr. Junkun Ma ET 493 Instructor : Dr. Cris Koutsougeras.

Modeling of a continous casting process. Introduction The purpose of this model is to describe the transition from melt to solid in the flow in the continous.

Heat Diagram of H2O.

Modelling & Simulation of Chemical Engineering Systems Department of Chemical Engineering King Saud University 501 هعم : تمثيل الأنظمة الهندسية على الحاسب.

Energy, Heat, Temperature

E2C 2013 October 27-30, 2013 Budapest, Hungary Experimental Study of Phase Change Materials for Thermal Storage in the Temperature Range of o C.

 Solids  Liquids  Gases  Plasma  Melting  Boiling  Freezing  Heat of fusion  Specific heat  Temperature  Heat  Heating curve  Heat of vaporization.

Convection: Internal Flow ( )

2 types of Heat Energy Kinetic Energy – is energy in motion. Temperature is the average KE of molecules Potential Energy – is energy in storage aka latent.

Heat Exchanger Design What can we learn from considering the temperature profile over the length of the heat exchanger in addition to the end points?

Objectives Review: Heat Transfer Fluid Dynamics.

HW/Tutorial # 1 WRF Chapters 14-15; WWWR Chapters ID Chapters 1-2

Lesson 7: Just A Phase Key Terms. Solid A solid has definite volume and definite shape. The particles in a solid are closely packed and vibrate in relation.

HW/Tutorial # 1 WRF Chapters 14-15; WWWR Chapters ID Chapters 1-2 Tutorial #1 WRF#14.12, WWWR #15.26, WRF#14.1, WWWR#15.2, WWWR#15.3, WRF#15.1, WWWR.

PHYSICS – Thermal properties and temperature (2)..

Heat Transfer by Convection

Heat Transfer Su Yongkang School of Mechanical Engineering # 1 HEAT TRANSFER CHAPTER 8 Internal flow.

Important Terms & Notes Feb , Energy Flow During Phase Changes of Matter Energy must be ABSORBED by matter when the phase changes from: –

Heat Transport Temperature of a wolf pup.

Heat Transfer Su Yongkang School of Mechanical Engineering # 1 HEAT TRANSFER CHAPTER 11 Heat Exchangers.

Heat, Temperature, Heat Transfer, Thermal Expansion & Thermodynamics.

SPECIFIC LATENT HEAT. Objective At the end of this lesson, you should be able to : At the end of this lesson, you should be able to : State that transfer.

Lesson 7: Thermal and Mechanical Element Math Models in Control Systems ET 438a Automatic Control Systems Technology 1lesson7et438a.pptx.

Heat Transport Temperature of a wolf pup.

Lesson 7 Steam Power Plant.

First Law of Thermodynamics applied to Flow processes

Thermal Response of Climate System

Chapter 1: Introduction and Basic Concepts

HEAT EXCHANGERS Red Sea University Faculty of Engineering

Heat Transfer: Physical Origins and Rate Equations

THERMAL ENERGY.

Chapter 8: Internal Flow

HW/Tutorial # 1 WRF Chapters 14-15; WWWR Chapters ID Chapters 1-2

Date of download: 10/16/2017 Copyright © ASME. All rights reserved.

Date of download: 11/2/2017 Copyright © ASME. All rights reserved.

Date of download: 1/2/2018 Copyright © ASME. All rights reserved.

Heat energy from the sun Thermal characterisation of a latent heat thermal energy storage system by means of a dynamic artificial neural network Presentation.

UNIT - 4 HEAT TRANSFER.

What are Heat Pipes/Heat Exchangers?

Thermochemical Calculations

Chapter 5 The First Law of Thermodynamics for Opened Systems

Fluid kinematics Chapter 3

Comparison between Serrated & Notched Serrated Heat Exchanger Fin Performance Presented by NABILA RUBAIYA.

ET 438a Automatic Control Systems Technology

Introduction to Heat Transfer

Chapter 11 HEAT EXCHANGERS Mehmet Kanoglu University of Gaziantep Copyright © 2011 The McGraw-Hill Companies, Inc. Permission required for reproduction.

Phase Change Materials (PCM)

The Heat Pump-pumps heat from a cold area to a warmer area.

Latent Heat and Phase Changes

12. Heat Exchangers Chemical engineering 170.

Presentation transcript:

Modeling a PCM storage unit for solar thermal cooling in Masdar City Irene Rubalcaba Montserrat RSC Members: Dr. Matteo Chiesa Dr. Peter Armstrong Dr. Ali Abbas Thank you for coming to my defense.. The title of my thesis is “Modeling a PCM storage unit for solar thermal cooling in Masdar City My research committee members are Dr. Chiesa, Dr. Armstrong and Dr. Abbas.

Solar cooling system Solar Field Charging mode Discharging mode PCM Storage Unit Drum Condenser Evaporator Pump Heat Exchanger Generator Absorber Cooling System

Power profile from the Beam Down [kW] 21st of March 2011

Supply and demand disparity storage opportunity

Supply and demand disparity storage opportunity Extra heat to store Storage use

STORAGE MODELING Geometry CYLINDRICAL STORAGE COMPARTMENT Length=11m COPPER PIPE Length=11m Outside Diameter= 0.012m Thickness=1mm

Modeling phase change using COMSOL Melting range = ΔTm ΔTm = 490 to 493 K Cp= 1330 + Latent heat/ΔT FULLY SOLID Cp = 1330 [J/KgK] FULLY LIQUID

Numerical modeling Problem Type: Transient Thermal Fluid Model Used: Time depending - Non Isothermal flow Incompressible Navier- Stokes: Heat Transfer by conduction and convection: Geometry is considered 2D axial symmetry

2D Axial symmetry model Maximum Energy Storage Capacity: 400 [MJ] + Sensible Heat

Numerical Results for 44 tubes after 20700 seconds - 5.75 hr Enthalpy Temperature

Mesh Sensitivity Mesh Type Extremely Fine Normal Coarser Number of elements 536,068 88,946 82,327

Effect of fins No fins 5 Fins 10 Fins 20 Fins

Effect of inlet velocity v= 0.0932 m/s v= 0.0832 m/s v= 0.07992 m/s v= 0.07629 m/s

Solidification temperature outlet

Material= KNO3-NaNO3(eu) Final Design Material= KNO3-NaNO3(eu) 81 tubes L =11m ri= 1 cm r0= 3 cm Total volume= 5.7m3 Total PCM mass = 4.209 tons Maximum storage capacity = 400[ MJ] + sensible heat Symbol Description Value Units Latent heat of fusion of the PCM 95000 Density of the PCM 1880 Specific heat of the PCM 1330 Thermal conductivity of the PCM 4 αpcm Thermal diffusivity Melting Temperature of the PCM 493 / 220 K / C