Latvian Maritime academy

TW K3fkhk( Q mSCSTS Qk ) K1 TW ACh( T 273,15) vW 0,378 W 0,378dT 1 dt ( Ca CVw)V qV ( K1m K2 fk ) TW CV ( K1m K2fk)( T 273,15) TW(3)Velocity balanceWhile deriving the mathematical model for the control volume, following assumption is considered:"Pressure inside the control volume is constant and equal to the atmospheric pressure". The difference ofthe dried air amount that is entering and leaving the control volume is equal to the mass difference causedby the temperature and humidity change in the control volume which results with density variation. Airvelocity in the control volume is achieved by isolating the velocity from this equation [12].f V 1 dT dWv TW ( W T )(4)k2ATkW kA ( TW ) dt dtTypical heat transfer of the chambersFor our system is a ship, the wall internal section between localities is accepted as formed by metalplate at the innermost, isolation material on it and mica coating at the outmost. According to thesespecifications, while temporal heat loss equation is obtained, it is assumed that heat isolation material isnot capable of heat absorption.(a)(b)Figure 2. Heat transfer of the chamber sections: (a) inner chamber, (b) outer chamber, ceiling and floorHeat transfer occurs by convection and conduction from the locality to the outer environment. Whilethe mathematical expression of this heat transfer is formed, it is assumed that only steel plate has thecapacitive effect and this effect is in the middle of the material. And regarding this assumption, heattransfer equations of the compartments are obtained as follows: R1dQk1 T T dt R dt R C R C Rd1 dT Rad 2Q kd1 d1 m d 2 m d1 R1dQk21 T T dt R dt R C R C Rd 3 dT Rad 4Q k 2d 3 d 3 m d 4 m d 3(5)(6)16