coolpack练习.pdf

发布时间：2022-06-08 发布人：admin 分类：说明书资料大小：0.47M 资料格式：pdf 举报版权申诉

yanhongli0922-2749949-4744300845233393270.pdf-第1页.png

第1页 / 共48页

yanhongli0922-2749949-4744300845233393270.pdf-第2页.png

第2页 / 共48页

yanhongli0922-2749949-4744300845233393270.pdf-第3页.png

第3页 / 共48页

yanhongli0922-2749949-4744300845233393270.pdf-第4页.png

第4页 / 共48页

yanhongli0922-2749949-4744300845233393270.pdf-第5页.png

第5页 / 共48页

yanhongli0922-2749949-4744300845233393270.pdf-第6页.png

第6页 / 共48页

yanhongli0922-2749949-4744300845233393270.pdf-第7页.png

第7页 / 共48页

yanhongli0922-2749949-4744300845233393270.pdf-第8页.png

第8页 / 共48页

Introduction

Description of CoolPack

CoolPack contact

Installation

Exercises

Overview of exercises in this tutorial

Exercise 1: Fundamental concepts in CoolPack

Exercise 2: Fundamental concepts in EESCoolTools

Exercise 3: Fundamental concepts in Refrigeration Utilities

Exercise 4: Short EESCoolTools exercise

Exercise 5: Short Refrigeration Utilities exercise

Exercise 6: Creation of property plots and drawing refrigeration cycles

Exercise 7: One-stage cycle with dry expansion evaporator

Exercise 8: One-stage cycle with flooded evaporator

Exercise 9: Designing a one-stage refrigeration system

Exercise 10: Energy analysis of a system with on/off-type capacity control

Exercise 11: Liquid flow in pipes (pressure drop and heat transfer)

Exercise 12: Transient cooling of goods in a refrigerated room

Concepts, shortcuts, and other hints

Overview of programs in CoolPack

Programs in Refrigeration Utilities

Programs in EESCoolTools: Cycle analysis (C-Tools)

Programs in EESCoolTools: Design

Programs in EESCoolTools: Evaluation (E-Tools)

Programs in EESCoolTools: Auxiliary Tools (A-Tools)

Programs in Dynamic

无标题

- a collection of simulation tools for refrigeration - Tutorial - Version 1.46 Authors: Arne Jakobsen Bjarne Dindler Rasmussen Morten Juel Skovrup Simon Engedal Andersen Department of Energy Engineering Technical University of Denmark (DTU) CoolPack@et.dtu.dk www.et.dtu.dk/CoolPack May 2001

SysSim CoolPack – a collection of simulation programs for refrigeration Table of Contents 1 INTRODUCTION .............................................................................................................. 3 2 DESCRIPTION OF COOLPACK ..................................................................................... 3 3 COOLPACK CONTACT ................................................................................................... 5 4 INSTALLATION.................................................................................................................. 7 5 EXERCISES .......................................................................................................................... 8 5.1 Overview of exercises in this tutorial...................................................................................8 Exercise 1: Fundamental concepts in CoolPack ..............................................................................9 Exercise 2: Fundamental concepts in EESCoolTools ...................................................................10 Exercise 3: Fundamental concepts in Refrigeration Utilities......................................................15 Exercise 4: Short EESCoolTools exercise........................................................................................19 Exercise 5: Short Refrigeration Utilities exercise...........................................................................21 Exercise 6: Creation of property plots and drawing refrigeration cycles..................................23 Exercise 7: One-stage cycle with dry expansion evaporator.........................................................27 Exercise 8: One-stage cycle with flooded evaporator ....................................................................29 Exercise 9: Designing a one-stage refrigeration system.................................................................31 Exercise 10: Energy analysis of a system with on/off-type capacity control ............................36 Exercise 11: Liquid flow in pipes (pressure drop and heat transfer) .........................................38 Exercise 12: Transient cooling of goods in a refrigerated room ................................................40 6 CONCEPTS, SHORTCUTS, AND OTHER HINTS.................................................... 42 7 OVERVIEW OF PROGRAMS IN COOLPACK ........................................................... 44 PROGRAMS IN REFRIGERATION UTILITIES............................................................................44 PROGRAMS IN EESCOOLTOOLS: CYCLE ANALYSIS (C-TOOLS) ..........................................44 PROGRAMS IN EESCOOLTOOLS: DESIGN ............................................................................44 PROGRAMS IN EESCOOLTOOLS: EVALUATION (E-TOOLS) ................................................45 PROGRAMS IN EESCOOLTOOLS: AUXILIARY TOOLS (A-TOOLS) .......................................45 PROGRAMS IN DYNAMIC ........................................................................................................45 7.1 7.2 7.3 7.4 7.5 7.6 Printouts from catalogs (used in exercise 9) can be found in the separate appendix. CoolPack Tutorial Rev. 05-03-01 Page i

CoolPack – a collection of simulation programs for refrigeration Page ii Rev. 17-05-01 CoolPack Tutorial

CoolPack – a collection of simulation programs for refrigeration 1 INTRODUCTION This tutorial gives a general introduction to CoolPack and contains a number of exercises demonstrating how the programs in CoolPack should be used. The exercises are organized in groups representing the various types of investigations for which CoolPack can be used. The first exercises are introductory, focussing on how to use the various types of programs in CoolPack and how to navigate between them. The following exercises are more detailed and aimed at demonstrating the use of CoolPack for analyzing refrigeration systems. Once you have become familiar with the programs in CoolPack, we hope that you will use CoolPack for solving the refrigeration-oriented tasks related to your job/education. If you have any comments or questions about CoolPack we encourage you to contact us – your comments and ideas will be very helpful to us in making CoolPack an even better program. 2 DESCRIPTION OF COOLPACK The development of CoolPack started in spring of 1998 as a part of a research project. The objective of this project was to develop simulation models to be used for energy optimization of refrigeration systems. The users of these models would be refrigeration technicians, engineers, students etc. in short all the persons with influence on the present and future energy consumption of refrigeration systems. The first idea was to make a general and comprehensive simulation program that would give the user all the flexibility he/she could wish for in terms of handling many different system designs and investigation purposes. Some of the characteristics of very general and flexible programs are that they require many user inputs/selections and that their numerical robustness is rather low. Experience with this type of programs has shown that this type of simulation programs is far from ideal for the main part of the users mentioned above. Since most of these users have limited time for carrying out the investigation, general and comprehensive programs will in many cases be very ineffective to use and they are therefore often discarded by the users. The idea behind the development of CoolPack is different from the idea described above. Instead of creating a large, general and comprehensive simulation program we have chosen to create a collection of small, easy to use, and numerically robust simulation programs. The typical simulation program in CoolPack deals with only on type of refrigeration system and has a specific investigation purpose. It therefore only requires the user inputs/selections necessary to describe operating conditions etc. and not any inputs for describing the system design or for specifying the input/output structure associated with the simulation purpose. When developing the programs for CoolPack we have focused on making the underlying system models as simple, relevant and numerically robust as possible. We have preserved some flexibility in that the user can select refrigerant and also specify inputs (like pressure) in more than one way (saturation temperature or pressure). The programs in CoolPack covers the following simulation purposes: • Calculation of refrigerant properties (property plots, thermodynamic & thermophysical data, refrigerant comparisons) • Cycle analysis – e.g. comparison of one- and two-stage cycles • System dimensioning – calculation of component sizes from general dimensioning criteria System simulation – calculation of operating conditions in a system with known components • CoolPack Tutorial Rev. 03-06-00 Page 3

CoolPack – a collection of simulation programs for refrigeration • Evaluation of operation – evaluation of system efficiency and suggestions for reducing the energy consumption • Component calculations – calculation of component efficiencies • Transient simulation of cooling of an object – e.g. for evaluation of cooling down periods To make it easier to get an overview of the programs in CoolPack we have chosen to divide the programs into three main groups (Refrigeration Utilities, EESCoolTools and Dynamic). Figure 2.1 gives an overview of the content in these groups. Refrigeration Utilities Refrigerant property plots and cycles Refrigerant calculator Secondary fluid calculator Psychrometric charts CoolPack EESCoolTools Dynamic Cooling down of an object/room. (One-stage system) Cycle analysis System dimensioning System simulation Operation analysis Component calculations Refrigerant properties Comparison of refrigerants Figure 2.1: Overview of the main groups in CoolPack. The group Refrigeration Utilities consist of 3 refrigerant oriented programs, primarily used for calculating the properties of primary and secondary refrigerants, creating property plots for primary refrigerants (like p-h, T-s and h-s diagrams) and for calculating the pressure drop for flow of secondary refrigerants in pipes. Furthermore, it is possible to create property plots for humid air (psychrometric charts). The programs in Refrigeration Utilities group have been released previously as independent programs. The first versions of the programs were released in 1996 and they have since then been expanded significantly with new refrigerants, more property plots etc. Apart from the built in property functions the current version can also use the very accurate property functions used in the RefProp program. If you have RefProp ver. 6.01 you will now be able to create high quality property plots based on RefProp data for refrigerants. Se the on-line help in the programs. The group EESCoolTools contains a large collection of programs for both refrigeration systems and components. We have chosen to divide this group into four subgroups as shown on Figure 2.2. The groups also represent the four phases of designing a refrigeration system. The programs in these four groups have almost the same type of user interface, making it easier to combine their use and also use them for comparisons. The name EESCoolTools consists of the three words EES, Cool and Tools: Page 4 Rev. 17-05-01 CoolPack Tutorial

CoolPack – a collection of simulation programs for refrigeration • "EES" refers to the name of the program we have implemented our simulation models in (Engineering Equation Solver - EES). EES is developed by S.A. Klein and F.L. Alvarado, and is sold by F-Chart Software in Wisconsin, USA. You can get more information about EES and F- Chart Software on the Internet at www.fchart.com • "Cool" refers to the fact, that the simulation models are related to the area of refrigeration. • "Tools" refers to that the programs are thought to be tools enabling you to make faster and more consistent (energy) design and analysis. Cycle Analysis (C-Tools) Selection of cycle and specification of primary parameters Dimensioning (D-Tools) Use of dimensioning criteria for dimensioning of components System Simulation (S-Tools) Calculation of operating conditions with selected components Evaluation (E-Tools) Energy analysis based on measurements Figure 2.2: EESCoolTool subgroups The group named Dynamic contains the dynamic programs in CoolPack. So far only a single program is available. With this program it is possible to simulate the cooling down of an object/room under various conditions and with on/off-capacity control of the compressor. The dynamic element is modeled and solved using a DAE solver application called WinDALI. WinDALI is based on the DALI-program developed in 1985, at what at that time was called the Refrigeration Laboratory at the Technical University of Denmark (now a part of Department of Energy Engineering). The present version of WinDALI is freeware an is well documented. If you are interested in making your own dynamic simulation models, you are welcome to have a copy of WinDALI – all you have to do is to contact us. The individual programs in CoolPack are described further in Chapter 6 of this tutorial. 3 COOLPACK CONTACT CoolPack was developed as part of a research project called SysSim (an abbreviation for “Systematic Modeling and Simulation of Refrigeration Systems”). This project was financed by the Danish Energy Agency. The project administrator is Arne Jakobsen (aj@mek.dtu.dk). CoolPack will be updated continuously, and you will always be able to download the latest version from www.et.dtu.dk/coolpack. Here you can also find news about the program and CoolPack Tutorial Rev. 03-06-00 Page 5

CoolPack – a collection of simulation programs for refrigeration technical support. CoolPack is freeware and you are welcome to pass on you copy of the program to colleagues and friends. We encourage all who use CoolPack to register so that we can inform them about new versions and CoolPack-related arrangements. In the process of updating and expanding CoolPack we need your feedback. All comments and suggestions are welcome and are also highly appreciated! General questions, comments or requests for support should be directed to CoolPack@et.dtu.dk or they can be faxed to us on +45 4593 5215. The development of CoolPack is performed by Team CoolPack consisting of the following members: Name Arne Jakobsen Bjarne Dindler Rasmussen Morten Skovrup Simon Engedal Andersen Telephone +45 4525 4129 +45 4525 4120 E-mail aj@mek.dtu.dk ms@mek.dtu.dk The members of Team CoolPack can also be contacted directly by telephone or e-mail – the numbers and addresses can be found in the table above. You can contact all team members through the mail: coolpack@et.dtu.dk Page 6 Rev. 17-05-01 CoolPack Tutorial

分享到：

赞收藏

资料库

coolpack练习.pdf

相关推荐

课程资源

热门标签

最新资料