Steam at 200 kPa and 150°C is used to prepare hot water in a flow system. The steam cools and condenses such that the outlet flow is a saturated liquid (note that flows in heat exchangers generally have negligible pressure differences between the inlet and outlet.) The water to be heated enters at 10°C and we want 55°C (~130°F) hot water at the outlet. If we want 0.1 kg/s of hot water, how much steam is needed (kg/s)? Steam 200 kPa 150°C Water 100 kPa 10°C 0.1 kg/s JL Water 100 kPa 55°C Saturated Liquid Condensate 200 kPa

Steam at 200 kPa and 150°C is used to prepare hot water in a flow system. The steam cools and condenses such that the outlet flow is a saturated liquid (note that flows in heat exchangers generally have negligible pressure differences between the inlet and outlet.) The water to be heated enters at 10°C and we want 55°C (~130°F) hot water at the outlet. If we want 0.1 kg/s of hot water, how much steam is needed (kg/s)? Steam 200 kPa 150°C Water 100 kPa 10°C 0.1 kg/s JL Water 100 kPa 55°C Saturated Liquid Condensate 200 kPa

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: 1-Water vapor enters an adiabatic turbine at 6.5MPa pressure and 400 ° C temperature, with a mass…

Q: In the condenser of a thermoelectric plant, steam will be condensed at a temperature of 50°C by…

A: The principle of heat balance is used to solve the problem that is heat absorbed by the lake water…

Q: HOwrate of 0.75 Ibm/s of water at 80 F and 70 pisa is mixed with 1 Ibm/s of saturated vapor water at…

A: To determine the quality of steam leaving the chamber, first, we need to calculate the enthalpy of…

Q: maximum amount of power in kW

A: Given: Geothermal power plant mass of pressurized ground water=1,500,500 kg/hr P1=620 F P2=250 psi…

Q: Saturated liquid water is heated in a heat exchanger until it exits as a saturated liquid vapor…

A: Given:-For oil,Tho=150°CTco=40°Cmo=5 kg/sCo=2.2 kJ/kg-cFor water,Tcw=25°Cmw=1.5…

Q: Refrigerant 134-a enters a compressor as saturated vapor at -20°C and leaves at 1.2 MPa and 80°C.…

Q: Refrigerant-134a at 1 MPa and 90 degrees * C is to be cooled to 1 MPa and 30 degrees * C in a…

A: Given data as per question The pressure of Refrigerant at entry =1 Mpa The temperature of…

Q: In a water heating system, cold water at 5°C flowing at a rate of 4 kg/s is mixed adiabatically with…

Q: A cooling tower is a device that cools a spray of water by passing it through a stream of air. If 15…

A: Tdb1=T1=30oc Twb1=T2=20oc Patm=P1=P2=90 Kpa To find: The partial vapor pressure of entering…

Q: A 4 kg/s of saturated liquid water at 0.83 MPa is produced from mixing of cold water at 1.2 MPa,…

A: Given data: The inlet pressure at state 1 is P1=0.65 MPa The inlet pressure at state 2 is P2=1.2…

Q: In steam power plants, open feedwater heaters are frequently utilized to heat the feedwater by…

Q: Refrigerant-134a at 1.4 MPa and 90°C is throttled to a pressure of 0.6 MPa. The temperature of the…

A: Throttling is a process in which the fluid is allowed to pass through a restricted passage and…

Q: Air at 20 ° C and 50% RH is channeled into the heating coil so that the temperature of the dry ball…

A: Given data:

Q: Refrigerant R134a enters an expansion valve at 800 kPa as a saturated liquid and exits at 100 kPa.…

A: Given:The initial pressure is .The final pressure is .The initial condition is saturated…

Q: velocity and exits at 1 MPa and 347°C with a velocity of 90 m/s. The compressor is cooled at a rate…

Concept explainers

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

Question

Steam at 200 kPa and 150°C is used to prepare hot water in a
flow system. The steam cools and condenses such that the
outlet flow is a saturated liquid (note that flows in heat
exchangers generally have negligible pressure differences
between the inlet and outlet.) The water to be heated enters
at 10°C and we want 55°C (~130°F) hot water at the outlet. If
we want 0.1 kg/s of hot water, how much steam is needed
(kg/s)?
Steam
200 kPa
150°C
Water
100 kPa
10°C
0.1 kg/s
JL
Water
100 kPa
55°C
Saturated Liquid
Condensate
200 kPa

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Write the given data.

VIEW

Step 2: Calculate the amount of steam (mass flow rate of steam).

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 9 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

(b) A mass of air is initially at 320°C and 100 kPa, having a volume of 0.5m³. The air is heated at constant volume to 250 kPa. An isentropic expansion process is then carried out, followed by an isothermal process which completes the cycle. (i) Sketch the cycle on P-v and T-s planes. (ii) Find the heat received and heat rejected in the cycle. (iii) Calculate the thermal efficiency of the cycle.
As the refrigerant as shown in the figure, R134a fluid is used in a commercial refrigerator. The refrigerant leaves the evaporator at a temperature of -33.5°C (239.65 K) and a pressure of 60 kPa. It is then compressed to a pressure of 1.2 MPa and a temperature of 64°C (337.15 K). In the water-cooled condenser, the refrigerant is cooled to 41°C (314.15 K). Water enters the condenser at 18°C and leaves at 26°C. In this context; *Calculate the degree of dryness (quality) of the refrigerant at the evaporator inlet [%]. (I ask you to write with the keyboard so that I can understand the answers. Thank you)
Steam enters a turbine with a mass flow rate of 15 kg/s at 500°C and 8 MPa. 30% of the steam is removed in the middle of the turbine where the steam is at saturated vapor state at 300 kPa. The remainder of the steam leaves turbine exit at 10 kPa and quality of 10 percent. If the turbine is adiabatic, what is the power generated by this turbine?
(4) An adiabatic mixing chamber is used to mix 2.14 kg/s of water at 960 kPa and 30°C with 0.7 kg/s of water at 960 kPa and 70C to as one water steam at 960 kPa and certain desired temperature. If the exit pipe diameter is 2.2 cm, the exit velocity is: (a) 6.81 m/s (b) 7.05 m/s (c) 7.26 m/s (d) 7.53 m/s (e) 7.79 m/s
5-84 Air (Cp=1.005 kJ/kg°C) is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. Air enters the heat exchanger at 95 kPa and 20°Ct at rate of 0.6 m³/s. The combustion gases (Cp=1.10 kJ/kg°C) that enter at 160°C at a rate of 0.95 kg/s and leave at 95°C. Determine the rate of heat transfer to the air and its outlet temperature. Air 95 kPa 20°C 0.6 m³/s Exhaust gases 0.95 kg/s 95°C
A vapor at a flow rate of 3 kg/s enters a group of eight (8)nozzles at 1.5 MPa, 240 oC and a velocity of 480 m/s, and then expands to 0.07MPa. If the efficiency of each nozzle is 0.95 and the cross-sectional area ofeach nozzle is rectangular with sides’ length ratio is 1:2.5. Determine:a- The steam exit velocity for each nozzle and the dimensions of the nozzlesection at its entrance and its exit.b- The steam exit velocity in case of the neglecting the steam entrance velocity
Wet coal amounting to 10000 ton/day is dried in an air dryer .The wet coal feed enters with 24% by mass of water and exits with 4%.The hot air used to dry the wet coal is fed at 40°C dry‐bulb temperature ,and 16°C wet‐bulb temperature .The moist air exits the dryer with 40% RH at 30°C. Calculate the amount of dry air atm 4/h at STP. Use psychrometric chart
Super heated steam
(4) An adiabatic mixing chamber is used to mix 1.52 kg/s of refrigerant R-134a at 950 kPa and – 30°C with 1.36 kg/s of R-134a at 950 kPa and – 4°C to exit as one stream of refrigerant at 950 kPa and certain desired temperature. If the exit pipe has a diameter of 1.8 cm, the exit velocity of the refrigerant is: (a) 8.4 m/s (b) 9.5 m/s (c) 10.6 m/s (d) 11.7 m/s (e) 12.8 m/s
One kg of steam at 1.4MP is throttled to IMPA at which pressure it is just dry. The steam is then expanded in an engine cylinder down to 0.1 MPa, the final dryness fraction being 0.75. The steam is finally passed to a feed water heater in which only the enthalpy of evaporation is extracted, the temperature of the feed water rising from 15 oC to 60 oC. Determine: a- the original dryness fraction of the steam b- the law of expansion in the engine cylinder c- the quantity of feed water heated/ kg of steam. 9. (0.994, 1.225; 8.98kg/kg steam)
2
A boiler produces 5.4 tonnes/hour of steam at a pressure of 1.5 MPa and a temperature of 350°C. Feedwater enters at a temperature of 44.5°C. At exit from the economizer part of the boiler the temperature is 93.5°C. At exit from the evaporator part of the boiler the steam is 90 A % dry. Energy is supplied by 600 kg of coal per hour, which has a calorific value of 32 MJ/kg. The A/F ratio is 15 1. The temperature of the flue gas at exit from the the economizer part of the boiler is 210°C. The average specific heat at constant pressure of the in the economizer is 1045 J/kg.K. When the ambient temperature is 24°C : 7. IS flue gas 7.1 Calculate the efficiency of the boiler. [83.3 %] Calculate the equivalent evaporation from and at 100°C per unit mass of fuel. |11.9| Draw up an energy balance, on a kJ/kg coal basis, with percentages of the total energy supplied. Jeconomizer 6.8 %, evaporator 62 %, superheater 15.5 %, to atmosphere 9.7 %, other 7.2 7.3 losses 7 %]