In a lithium bromide-water absorption refrigeration system, the condenser andevaporator temperatures are 36°C and 8°C respectively. The generator temperatureis 90°C and the absorber temperature is 30°C. The temperature of the solution entersthe generator is 60 °C Assume a pressure drop of 2.5 mm Hg between the generatorand condenser and 1 mm Hg between the evaporator and absorber. Determine theheat rejection rates in the condenser and absorber for one-ton refrigeration capacity.Also find the heat input to the generator, and COP.

Answered: In a lithium bromide-water absorption…

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

Similar questions

Parvinbhai
1. A standard refrigerating system with a heat exchanger is operating with a condenser pressure of 1571.2 kPa and evaporator pressure of 421.35 kPa using refrigerant R22. If the liquid line from the condenser is soldered to the suction line from the evaporator to form a heat exchanger and if as a result of this, the saturated vapor leaving the evaporator is superheated by 10.
An air-conditioning absorption system has an evaporator capacity of 350 kW with a COP of 0.90 operating at a temperature of 25 C with a condensing temperature of 35 C. The same cooling tower was used to reject the heat from the condenser and the absorber operating 45 C & providing 1 kg/s of water plus lithium bromide solution to the generator. Consider the heat rejection ratio of condenser to evaporator is 1.05, Determine the following: 1. Heat given by the generator & the size of condenser in kW 2. Leaving condenser & evaporator enthalpies & the mass of refrigerant water flowing from the generator to the condenser then to the evaporator & to the absorber (using evaporator heat balance). 3. Weight of lithium bromide in kg/s, concentration in percent & enthalpy from the absorber to the generator in kJ/kg 4. Enthalpy from the generator to condenser in kJ/kg (using condenser heat balance) & concentration in percent & enthalpy from generator to absorber…
Problem 5 Space, at sea level, is to be maintained at 75°f db and =50%. 100% fresh air at 110°F db and o=20% is supplied to the heat recovery unit which uses the return air to cool the fresh air before draw off this air as shown in the figure. The heat recovery unit will reduce the fresh air by 20°F. The surface temperature of the cooling coil is 50 °F and delivers air to the space at 60°F db. d. Draw the process on the psychrometric chart. e. What is the off coil (point 3) relative humidity. What is the wet bulb temperature of the fresh air leaving the heat recovery unit (point 2)? f. How much heat was removed by the cooling coil per unit mass of dry air. g. How much energy was saved by using the heat recovery unit per unit mass of dry air? h. What is the mass flow rate of the condensed water from the cooling coil per unit mass flow rate of dry air? Heat Recovery System (3) (4) (5) Exhaust Space Fan (3) Outdoor (1) air Cooling Coil Filter
A Cascade refrigeration system using flash tank and intercooler is operating an evaporator with a capacity of 6 tons at a temperature of -30°C. The flash tank and intercooler is operated at 0.40 MPa. If the condensing temperature is 50°C, determine the COP and the refrigerating efficiency of the system. Draw the schematic diagram of the system and assume ideal conditions. Using R-32 p-h chart
Can you also show the plot on the chart provided? The mass flow rate of the refrigerant in a Single Stage Vapor Compression (SSVC) refrigeration system is 0.015 kg/s and the evaporating and condensing temperatures shall be -20°C and 50°C, respectively. Determine the following: (1) cooling capacity in tons, (2) work of compressor in kW, (3) COP of the system, (4) EER of the system, and (5) refrigerating efficiency. Can you also show the plot on the chart provided?
An ammonia system with a 158-kW evaporator operating at -1°C and a 35-kW evaporator operatingat -40°C uses flash gas removal and intercooling. The condensing temperature is 32°C. Thearrangement is as shown. How many kilograms per minute of ammonia are compressed by the high-pressure compressor?
3- Milk at 400C with a specific temperature of 3.85 kJ / kg K will be pasteurized at 75 oC using saturated steam at 120 oC in a plate heat exchanger. The heat exchanger operates in parallel current. In heating, the latent heat of the steam is used. What is the steam / milk ratio accordingly? The data required for steam is given in the table below. Enthalpy (MJ / kg) Temperature (oC) Absolute pressure (kPa) Saturated liquid Evaporation Saturated steam75 38.5575 0.31394 2.3214 2.6354120 198.54 0.50372 2.20225 2.70607 A. 17,75B. 56.33C. 0,056D. 0,017E. 68,7
In an ammonia refrigeration system, the pressure in the evaporator is 251 kPaa, and the ammonia at the evaporator entry is 0.1511 dry while at exit is 0.95 dryIf the rate of ammonia circulation is 4.56 kg / m * i * n , determine the refrigerating capacity of the system. Use the properties of ammonia from refrigerantstable
The condenser of a steam power plant has a total surface area of 45m^2 and an overall heat transfer coefficient of 2100Watts/m^2-K. Saturated steam from the turbine enters this condenser at 30C and leaves as saturated liquid at the same temperature. Cooling water enters the condenser at 14C and leaves at 22C. A. Draw the figure, sketch the t-L diagram, then, compute the LMTD of the cross-flow heat exchanger in Kelvin. B. How much heat is transferred by the condenser in MW? C. How much steam passes through the condenser in kg/s? D. How much cooling water is supplied to the condenser in kg/s.
. A 10 TR ammonia ice plant has a two-pass shell-and-tube water-cooled condenser. The water enters at 30°C. The temperature rise of water may be taken as 2.5°C. The refrigerant condensing temperature is 35°C, the heat rejection ratio of the plant is 1.35. The condenser has 24 steel tubes of 21 mm OD and 13.65 mm ID. Determine the length of the tubes.
Problem: An ammonia refrigerating system shown in the figure is composed of three evaporators and arranged with multiple expansion valves and intercoolers. The load and operating temperature of each evaporator are shown in the table below: condenser evaporator 3 compressor 3 intercooler 2 evaporator 2 compressor 2 Infercooler 2 liquid evaporator 1 compressor 1 Evaporator Load, tons Evaporator Temperature, °C 1 30 - 30 20 - 20 15 - 10 Condensing pressure is 1200 kPa. Refrigerant vapor exits evaporator no. 1 with a 10 - degree superheat. Saturated conditions exist at the exits of the evaporator no. 2 and evaporator no. 3. Liquid refrigerant leaves the condenser at 28°C. Determine a. the mass flow rate in evaporator 1 kg/s b. the mass flow rate in evaporator 2 kg/s c. the mass flow rate in evaporator 3 kg/s

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS