Also, for simplicity we can assume the pipes to be hydraulically smooth andestimate the friction factors with the Blasius correlationf =0.3164Re¹/4Table 1: Minor loss coefficients and pressure lossesEquipmentT-junction after the pump, flow going directlyT-junction after the pump, flow going to the branchControl valve CV290° bendPressure loss in a single radiatorCombining t-junction, flow going directlyCombining t-junction, flow coming from the branchSectionPump → t-junctiont-junctionradiator R1.1radiator R1.1 → t-junctiont-junction radiator R2.1radiator R2.1radiator R2.2radiator R2.2→ radiator R2.3radiator R2.3 →→ radiator R2.4radiator R2.4 → t-junctiont-junction endTable 2: Pipe lengths and diameters66241244Minor loss coefficient, K42412Length [m] Inner pipe diameter [mm]2212121818180.92181822120.74 kPa0.92(1) CV12The first heating line3CV2R1.1The second heating lineR2.4R2.3R2.2R2.1Figure 1: Crudely simplified centralised water heating system.The figure 1 above presents a crudely simplified centralised water heating sys-tem. The system comprises of two heating lines, the first line having one radiatorand the second has four radiators in series.The pressure after the pump (2) is 2 bar, and the flow velocity is 1.2 m/s.For simplicity we can assume the water to be in constant temperature of 60°C.Loss coefficients and pressure losses are listed in Table 1, and pipe lengths anddiameters are given in Table 2.For the system balancing, the target is to divide the mass flow so, so that 20%of the mass flow goes to the first line (i.e. through radiator R1.1) and 80% ofthe flow goes to the second line (R2.1 - R2.4):(a) How large pressure loss is needed in the control valve CV1 to get thedesired flow rates in the two lines?(b) How large is then the minor loss coefficient of the said valve, Kevi?!(c) How much is the pressure, in bar, at the end of the line at section 4?

Answered: Image /qna-images/answer/a0e618e7-058f-4fbb-bb05-115312fbd03f.jpg

The figure 1 above presents a crudely simplified centralised water heating sys- em. The system comprises of two heating lines, the first line having one radiator nd the second has four radiators in series. The pressure after the pump (2) is 2 bar, and the flow velocity is 1.2 m/s. or simplicity we can assume the water to be in constant temperature of 60°C. oss coefficients and pressure losses are listed in Table 1, and pipe lengths and iameters are given in Table 2. for the system balancing, the target is to divide the mass flow so, so that 20% f the mass flow goes to the first line (i.e. through radiator R1.1) and 80% of he flow goes to the second line (R2.1 - R2.4): (a) How large pressure loss is needed in the control valve CV1 to get the desired flow rates in the two lines? (b) How large is then the minor loss coefficient of the said valve, Kevi?! (c) How much is the pressure, in bar, at the end of the line at section 4?

The figure 1 above presents a crudely simplified centralised water heating sys- em. The system comprises of two heating lines, the first line having one radiator nd the second has four radiators in series. The pressure after the pump (2) is 2 bar, and the flow velocity is 1.2 m/s. or simplicity we can assume the water to be in constant temperature of 60°C. oss coefficients and pressure losses are listed in Table 1, and pipe lengths and iameters are given in Table 2. for the system balancing, the target is to divide the mass flow so, so that 20% f the mass flow goes to the first line (i.e. through radiator R1.1) and 80% of he flow goes to the second line (R2.1 - R2.4): (a) How large pressure loss is needed in the control valve CV1 to get the desired flow rates in the two lines? (b) How large is then the minor loss coefficient of the said valve, Kevi?! (c) How much is the pressure, in bar, at the end of the line at section 4?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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