Abstract

Room temperature is one of the problems in everyday life that is often discussed. One of the tools in regulating the temperature is Air Conditioner (AC). As is known, that the AC work process in cooling the room is the process of heat transfer. This study aims to find out how the AC works in regulating the temperature in a room. In the process, this research is accomplished by implementing finite element method on the energy transfer equation. Where the energy transfer equation is the partial differential used for heat transfer. In the finite element method, the flow field is broken down into a set of small fluid elements (discrete domains). In the solution, use it in three-dimensional space, then select the linear interpolation function for the 3D element, and derive the matrix and vector elements by the Galerkin method to obtain global equations. Results from computer-assisted studies show the temperature distribution in the room of COMSOL Multiphysic 5.0. Simulation results with COMSOL show that there is a correlation between AC location and solar radiation indoors against indoor temperature.

Highlights

  • Air Conditioner (AC) is a device that serves to control the air temperature in certain spaces

  • Temperature changes in a space by AC can be simulated in the COMSOL Multiphysic 5.2 program

  • To optimize ac performance as an air conditioner there are several ways that can be done among others: 1. determine the performance coefficients, or commonly known as COP (Coefficient of Performance). 2. testing the Energy Efficiency Ratio (EER). 3. choose the right size of air conditioner. 4. choose better freon quality. 5. perform ac treatment periodically

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Summary

Introduction

Air Conditioner (AC) is a device that serves to control the air temperature in certain spaces. Where AC changes the temperature of hot air into cold air in the room becomes more comfortable. Temperature changes in a space by AC can be simulated in the COMSOL Multiphysic 5.2 program. Where COMSOL is a simulation software with finite element method, which can basically simulate various physics and engineering applications, such as simulation of heat transfer through complex structures and others. Where k is the thermal conductivity (W/mK), T is the reaction temperature of flow (K), ρρ is the density (kkkk/mm3) , CCpp is the heat capacity at constant pressure (J/kgK), uu is the speed field (m/s) , qq is the volumetric rate of thermal energy generation (WW/mm3)

Basic Theory
Heat Transfer
Convection
Radiation
Optimization
Laminar and Turbulent Flows
Finite Element Metod
Methods
Shape Room Geometry with COMSOL Multiphysics
AC Optimization Parameters and Properties with COMSOL Multiphysics
Conclusion

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