Tiwi field which has an installed capacity of 275 Mwe operates using pressurized, deep groundwater at Tg = 420K as the heat source for binary cycle. A horizontal shell-and-tube heat exchanger with one shell pass and one tube pass, transfers heat between the tube side groundwater and the counterflowing shell-side organic fluid of the power cycle. The organic fluid enters the shell side of the evaporator as a subcooled liquid at Tei= 300K, and exits the evaporator as a saturated vapor of quality XR,O=1 and temperature Tc.o = Tsat = 395K. Within the evaporator, heat transfer occurs between liquid groundwater and the organic fluid in Stage A with UA = 900 W/m²K, and between liquid groundwater and boiling organic fluid in Stage B. with UB-1200 W/m² K. For groundwater and organic fluid flow rates of m, 10 kg/s and mg = 5.2 kg/s, respectively, determine the required evaporator heat transfer surface area. The specific heat of the liquid organic fluid of the Rankine cycle is cp, R = 1300 J/kgK and its latent heat of vaporization is hfg =110 kJ/kg. Specific heat of groundwater cp,G = 4267 J/kg K.

Tiwi field which has an installed capacity of 275 Mwe operates using pressurized, deep groundwater at Tg = 420K as the heat source for binary cycle. A horizontal shell-and-tube heat exchanger with one shell pass and one tube pass, transfers heat between the tube side groundwater and the counterflowing shell-side organic fluid of the power cycle. The organic fluid enters the shell side of the evaporator as a subcooled liquid at Tei= 300K, and exits the evaporator as a saturated vapor of quality XR,O=1 and temperature Tc.o = Tsat = 395K. Within the evaporator, heat transfer occurs between liquid groundwater and the organic fluid in Stage A with UA = 900 W/m²K, and between liquid groundwater and boiling organic fluid in Stage B. with UB-1200 W/m² K. For groundwater and organic fluid flow rates of m, 10 kg/s and mg = 5.2 kg/s, respectively, determine the required evaporator heat transfer surface area. The specific heat of the liquid organic fluid of the Rankine cycle is cp, R = 1300 J/kgK and its latent heat of vaporization is hfg =110 kJ/kg. Specific heat of groundwater cp,G = 4267 J/kg K.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.39P

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