1 Development of a Simulator for the HANARO Research Reactor (Modeling of Cooling Tower) H.S.Jung

2 Contents Discussions about SE Definitions Introduction of Cooling Tower Modeling Results Further Studies

3 Definitions error: Human action that results in software containing a fault. Examples include omission or misinterpretation of user requirements in a software specification, incorrect translation, or omission of a requirement in the design specification (ANSI/IEEE Std ). failure: (1) The termination of the ability of a functional unit to perform its required function (ISO; ANSI/IEEE Std ). (2) An event in which a system or system component does not perform a required function within specified limits. A failure may be produced when a fault is encountered (ANSI/IEEE Std ). fault: (1) An accidental condition that causes a functional unit to fail to perform its required function (ISO;ANSI/IEEE Std ). (2) A manifestation of an error in software. A fault, if encounterred, may cause a failure. Synonymous with bug (ANSI/IEEE Std ). ANSI/IEEE Std , IEEE Standard Glossary of Software Engineering Terminology.

4 Introduction-1 Removing heat from the plant by air

5 Introduction-2 Types of Cooling Towers Cross flow Counter flow

6 Specification Characteristics Speed [RPM]:1800/900 Horse Power [HP]:50/25 Volt [V]:440 Phase:3 Blade length [M]:4.267 No. of Blades:6 Air Flow[CM/S]:144.95

7 Schematic view-1

8 Schematic view-2

9 Assumptions Heat and mass transfer in the direction normal to flows only Negligible heat and mass transfer through tower walls to the environment Negligible heat transfer from the tower fans to the air or water streams Constant water and dry air specific heats (constant Cp,a and Cp,w) The mass fraction of water vapor in the air-vapor mixture is approximately equal to the humidity ratio Uniform temperature throughout the water stream at any cross section Uniform cross-sectional area of the tower

10 Modeling-1 Heat is transferred from water drops to the surrounding air by the transfer of sensible and latent heat

11 Modeling-2

12 Modeling-3

13 Modeling-4

14 Results

15 Further Studies Extended the scope of the simulation Complete the paper for proto type (existing) simulator Prepare a paper for the advanced simulator with new Interfaces