A binary vapour cycle operates on mercury and steam. Standard mercury vapour at 4.5 bar is supplied to themercury turbine, from which it exhausts at 0.04 bar. The mercury condenser generates saturated steam at 15bar which is expanded in a steam turbine to 0.04 bar.(1) Determine the overall efficiency of the cycle.(ii) If 48000 kg/h of steam flows through the steam turbinc, what is the flow through the mercury turbine ?(ii) Assuming that all processes are reversible, what is the useful work donc in the binary vapour aycle for thespecified steam flow ?(iv) If the steam leaving the mercury condenser is superhecated to a temperature of 300°C in a superhcaterlocated in the mercury boiler and if the internal efficiencies of the mercury and steam turbines are O.84 and0.88 respectively, calculate the overall efficiency of the cycle. The properties of standard mercury are givenbelow :hfkJlkg) h,(kJlkg) sp (kJlkg K) §, (kJkg K) v, (m³Ihg) v, (m³Ikg)0.5397p (bar) t (°C)4.545062.93355.980.135279.9 x 1060.0680.04216.929.98329.850.08080.692576.5 x 1065.178.

Answered: Image /qna-images/answer/c759afee-8ad4-496b-8589-bb433c7eccc2.jpg

A binary vapour cycle operates on mercury and steam. Standard mercury vapour at 4.5 bar is supplied to the mercury turbinc, from which it exhausts at 0.04 bar. The mercury condcnser generates saturated steam at 19 bar which is expanded in a steam turbinc to D.04 bar. 1) Determino the overall officiency of the cydle. (i) If 48000 kg/M of steam flows through the steam turbinc, what is the flow through the mercury turbine Cüi) Assuming that all processes are reversible, what is the useful work done in the binary vapour aycle for the specified steam flow ? (iv) If the steam lcaving the mercury condenser is superhcated to a temperaturc of 300°C in a superhcater located in the mercury boiler and if the internal officiencies of the mercury and steam turbines are D.84 and 0.88 respectivcly, calculate the overall officienoy of the aycle. The propertios of standard mercury arc given below : p (bar) t(°C) hfkJ/kg) hhJ/kg) s, (kJ/hg K) s, (kJlkg K) v, (m³lkg) v, (m³lkg) 4.5 450 62.93 355.98 0.1352 0.5397 79.9 × 10* 0.068 0.04 216.9 29.98 329.85 0.0808 0.6925 76.5 x 10 5.178.

A binary vapour cycle operates on mercury and steam. Standard mercury vapour at 4.5 bar is supplied to the mercury turbinc, from which it exhausts at 0.04 bar. The mercury condcnser generates saturated steam at 19 bar which is expanded in a steam turbinc to D.04 bar. 1) Determino the overall officiency of the cydle. (i) If 48000 kg/M of steam flows through the steam turbinc, what is the flow through the mercury turbine Cüi) Assuming that all processes are reversible, what is the useful work done in the binary vapour aycle for the specified steam flow ? (iv) If the steam lcaving the mercury condenser is superhcated to a temperaturc of 300°C in a superhcater located in the mercury boiler and if the internal officiencies of the mercury and steam turbines are D.84 and 0.88 respectivcly, calculate the overall officienoy of the aycle. The propertios of standard mercury arc given below : p (bar) t(°C) hfkJ/kg) hhJ/kg) s, (kJ/hg K) s, (kJlkg K) v, (m³lkg) v, (m³lkg) 4.5 450 62.93 355.98 0.1352 0.5397 79.9 × 10* 0.068 0.04 216.9 29.98 329.85 0.0808 0.6925 76.5 x 10 5.178.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

See similar textbooks

Similar questions

A binary vapour cycle operates on mercury and steam. Standard mercury vapour at 4.5 bar is supplied to the mercury turbine, from which it exhausts at 0.04 bar. The mercury condenser generates saturated steam at 15 bar which is expanded in a steam turbine to0.04 bar.(i) Determine the overall efficiency of the cycle.(ii) If 48000 kg/h of steam flows through the steam turbine, what is the flow through themercury turbine ?(iii) Assuming that all processes are reversible, what is the useful work done in the binaryvapour cycle for the specified steam flow ?(iv) If the steam leaving the mercury
A Steam Power Plant operates on the Rankine Cycle in which steam at 22 bar and dryness fraction of 0.95 enters the turbine and exhausts to a pressure of 0.1 bar in acondenser. The condensate is pumped as feedwater to the Boiler in which the steam is generated. Sketch the T-s diagram for this cycle and calculate the following performance parameters:(i) Cycle Thermal Efficiency(ii) Specific Steam Consumption(iii) Condenser Heat Load(iv) Cooling Water mass and volumetric flow rates for the condenser if the cooling water enters at 26 oC and leaves at 40 oC for a net power output of 24,000 kW. The specific heat capacity of the cooling water can be taken as 4.0 kJ/kg K and its density as 1023 kg/m3.
PLEASE ANSWER ALL AND SHOW COMPLETE SOLUTION. 1. Steam is the working fluid in an ideal Rankine cycle. The saturated vapor enters the turbine at 8.0 MPa and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 100 MW. Determine for the cycle (a) the thermal efficiency, (b) the mass flow rate of the steam, in kg/h, (c) the rate of heat transfer, into the working fluid as it passes through the boiler, in MW, (d) the rate of heat transfer, from the condensing steam as it passes through the condenser, in MW, (e) the mass flow rate of the condenser cooling water, in kg/ h, if cooling water enters the condenser at 15 DEGREE CELCIUS and exits at 35 DEGREE CELCIUS.
The mass flow rate of steam is 5 kg/s for a Rankine Cycle. For the actual cycle, the turbine efficiency is 86%, turbine brake efficiency is 80%, and generator efficiency=90%. The inlet conditions of the turbine are 3MPa and 400⁰C while the condensing pressure is 50kPa. a. Sketch the P-v, T-s and h-s diagram of the Cycle b. Calculate for the ideal and actual steam rates and heat rates of the Rankine Cycle and Rankine Engine, respectively. c. Determine the energy chargeable and combine thermal efficiencies for the Rankine Cycle and Rankine engine, respectively
1. In a Rankine cycle, steam enters the turbine at 2.5 MPa and condenser of 50 kPa.What is the thermal efficiency of the cycle? 2. Steam enters the superheater of a boiler at a pressure of 25 bar and dryness of 0.98 and leaves at the same pressure at a temperature of 370OC. Calculate the heat energy supplied per kg of steam supplied in the superheater. Kindly answer question 1 and 2 and show solution. Please help me. Thank you
A steam power plant operates on the simple ideal Rankine cycle. The steam enters the turbine at 4 MPa and 500°C and is condensed in the condenser at a temperature of 40°C. draw and label the schematic diagram and the pV and TS planes. (a) Show the cycle on a T-s diagram. If the mass flow rate is 10 kg/s, determine (b) the thermal efficiency of the cycle (c) the net power output in kW.
1. In a Rankine cycle, steam enters the turbine at 2.5 MPa and condenser at 50 kPa, what is the thermal efficiency of the cycle?At 2.5 MPa: hg = 2803.1 kJ/kg sg = 6.2575 kJ/ kg – KAt 50 kPa: sf = 1.0910 sfg = 6.5029hf = 340.49 hfg = 2305.4vf = 0.0010300
Steam is the working fluid in an actual Rankine cycle. Steam enters the turbine at 8.0 MPa and 550 deg. C; and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 110 MW. The turbine and the pump each have an isentropic efficiency of 83% Illustrate and label the TS diagram and determine the cycle (a) the cycle thermal efficiency (b) the back work ratio (c)the mass flow rate of the steam, in kg/h, (d) the rate of heat transfer into the working fluid as it passes through the boiler, in MW, (e) the rate of heat transfer, from the condensing steam, as it passes through the condenser, in MW, (f) the mass flow rate of the condenser cooling water, in kg/hr., if cooling water enters the condenser at 15 deg. C and exits at 35 deg. C.
In a Reheat Cycle steam enters the turbine @ 40 bar and 400 C. It expands isentropic ally to 6 bar and is reheated at constant pressure to 400 C. This steam expanded isentropic ally to 1 bar and is reheated at constant pressure to 200 C. Finally this steam is expanded isentropic ally in the condenser pressure of 0.1 bar. Determine the thermal efficiency and the capacity of the boiler if 10,000 KW of power output is required.
Steam at 4800 lbf/in.2, 1000 deg F enters the first stage of a supercritical reheat cycle including two turbine stages. The steam exiting the first-stage turbine at 600 lbf/in.2 is reheated at constant pressure to 1000 deg F. Each turbine stage and the pump have an isentropic efficiency of 85%. The condenser pressure is 1 lbf/in.2 If the net power output of the cycle is 100 MW, determine (a) the rate of heat transfer to the working fluid passing through the steam generator, in MW. (b) the rate of heat transfer from the working fluid passing through the condenser, in MW. (c) the cycle thermal efficiency.
Air enters the compressor of an ideal Brayton refrigeration cycle at 100 kPa, 270 K. The compressor pressure ratio is 3 and the temperature at the turbine inlet is 310 K. Determine:The above Brayton refrigeration cycle is modified by introducing a regenerative heat exchanger. In the modified cycle, the compressed air enters the regenerative heat exchanger at 310 K and is cooled to 280 K before entering the turbine. Determine for the modified cycle:f).the net work input per unit mass of air flow, in kJ / kg. g).the cooling capacity, per unit mass of air flow, in kJ / kg.h).the coefficient of performance.
In a Rankine cycle steam enters the turbine at 2.5MPa (enthalpies and entropies given) and condenser of 50KPa (properties given), what is the thermal efficiency of the cycle? At 2.5MPa: hg = 2803.1 sg = 6.2575, At 50KPa: sf = 1.0910 sfg = 6.5029 hf = 340.49 hfg = 2305.4 vf = 0.0010300