CLOSED EXPANSION VESSEL DIMENSIONING - PART III

Closed expansion vessels require the calculation of the water volume in the heating systems. This work intends a synthetic approach by creating a new calculation for the water volume in the heating systems, comprising boilers, horizontal and vertical pipes, distribution columns, connection branches and heating elements. The proposed synthetic formula allows the determination of water volume more precisely compared to classical formulas. Thus, using the volume so determined, the authors are submitting to the attention of the professionals a new formula for dimensioning of closed expansion vessels equipped with in elastic membrane, based on the general transformation of perfect gases – Chapyeron equation. The proposed formula takes into consideration the gas pressure inside the closed expansion vessel, when filling the system and also during the operation, thus dimensioning the vessel according to their real behaviour.