The Method of Hydraulic Calculation of a Heat Exchange Panel of a Solar Water-Heating Collector of a Tube–Tube Type with a Given Nonuniform Distribution of Fluid Flow Along Lifting Pipes

Calculation and experimental study of water distributor of stratification heat accumulator of solar heating system

“…Formula (21) can be used for making calculations for water distributors for stratification accumulators. The calculations method is similar to that of [10][11][12], and therefore we will confine ourselves only to making the sequence of calculations more precise: 1) we calculate 𝑑𝑑 𝑒𝑒 , F, and 𝑊𝑊 𝑏𝑏 ; 2) we determine 𝑅𝑅𝑅𝑅; , 𝜇𝜇𝑓𝑓 ̅ 𝑐𝑐𝑐𝑐 ; 3) we calculate the nominal slot area 𝑓𝑓 = 𝑙𝑙𝑙𝑙 = (𝜇𝜇𝑓𝑓 ̅ 𝑐𝑐𝑐𝑐 )𝐹𝐹/𝜇𝜇; 4) we determine the number of perforations 𝑚𝑚 = 𝑓𝑓/𝑙𝑙; 5) we determine the resistance of the water distributor for 𝑅𝑅𝑅𝑅 > 0: In the calculations it is necessary to specify d e in such a way that |Ri| ≥ 1.5; otherwise the condition μf ̅ cr ≤ 1 (see Fig. 3), which follows from (8), will not be observed.…”

Transition processes during the start-up of the pumping unit of happ

“…Based on the obtained values, the 4th straight line on the graph is constructed and point C is found. Since the graph uses the exact formula (11), the pressure loss in the water transmitter is found in exact values [16].…”

Water purification and demineralization technology

“…In thе prеsеnсе оf thе аdditiоns 2-3 mg/dm 3 оf PHMG еquаl оr bеttеr quаlitу оf thе Sirdаrуа Rivеr wаtеr filtrаtе bу mоst indiсаtоrs wаs асhiеvеd аt lоwеr dоsеs (bу 10-20 mg/dm3) оf АS, whilе thоsе оf thе Nаrin Rivеr wаtеr-аt thе lоwеr (bу 20-40 mg/dm 3 ) dоsе оf АS аftеr аdditiоn оf 5 mg/dm 3 оf PHMG. Lоwеr dоsеs оf PHMG did nоt mаkе it pоssiblе tо rеtаin thе filtrаtе quаlitу аt thе lоwеr dоsеs оf thе соаgulаnt [11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”