Steam accumulator simulation analysis

U industrijskim postrojenjima para ima široku upotrebu za razne procese. Međutim često postoji neravnoteža između proizvodnje i potrošnje pare, što rezultira ili otpadnom parom ili nedostatkom pare. Da bi riješio taj problem koriste se akumulatori pare koji služe kao spremnik energije, tj. pare. Kako bi se dodatno povisila učinkovitost akumulatora pare, a toplinski gubici smanjili na minimum, u kombinaciji s akumulatorom pare koriste se spremnici latentne topline. Tema ovoga rada je upravo analiza jednog takvog sustava. U radu je opisan princip rada i izvedbe akumulatora pare sa i bez spremnika latentne topline, objašnjeno je ponašanje fazno promjenjivih materijala (eng. Phase change materials – PCM), te je izveden matematički model zadanog sustava. Na temelju matematičkog modela prikazano je dinamičko ponašanje sustava pri punjenju i pražnjenju pomoću programskog paketa SIMULINK, koji je dio softverskog paketa MATLAB. Dobiveni su odzivi svih bitnih parametara sustava, kao što su tlak, entalpija, temperatura, itd. Analizom je pokazano kako latentni spremnik produljuje rad akumulatora pare i povećava njegovu učinkovitost.In industrial plants, steam is widely used for various processes. However, there is often an imbalance between steam production and consumption, resulting in either a waste steam or a lack of steam. To solve this problem, steam accumulators are used as a energy storage, ie steam storage tank. To further increase the efficiency of the accumulator and reduce heat losses to a minimum, latent heat storage tank can be used in combination with a steam accumulator. The subject of this paper is the analysis of one such system. The paper describes the principle of the operation and types of the steam accumulator with and without the latent heat storage tank. The phase change materials (PCM) are explained and a mathematical model of the default system is developed. Based on the mathematical model, the dynamic behavior of the system during charging and discharging is shown using the software package called SIMULINK, which is part of the software called MATLAB. Responses to all relevant system parameters, such as pressure, enthalpy, temperature, etc. are obtained. The analysis showed that the latent heat storage tank extends the operation of the steam accumulator and increases its efficiency