What is a heat pump and how does it work?
Q: 1. Assess the limiting factors that impact on the economics of heat pumps. As an example, consider…
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Q: What is the highest COP that a refrigerator operating between temperature levels TL and TH can have?
A: The maximum COP(Coefficient of performance)in a refrigerator is possible only when it runs on…
Q: What is the difference between:- 1. Heat engine and reversed heat engine? 2. Sign convection of heat…
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Q: heat removal rate from a refrigerated space and the power input to the compressor are 9.0kW and…
A: Given:HRR=9 kWW=1.8 kW
Q: A standard vapor compression system produces 20 tons of refrigeration using R-12 as refrigerant…
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Q: HAT IS THE BASIC DIFFERENCE BETWEEN A REFRIGERATION SYSTEM APPLIED IN AN AIR CONDITIONING AND IN THE…
A: Refrigeration is the process of lowering and/or maintaining a space, material, or system's…
Q: consider the following: a) Do you think a heat pump system will be more cost-effective in New York…
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Q: Define the coefficient of performance of a heat pump in words. Can it be greater than unity?
A: It is a mathematical approach which explains the work-ability of the heat pump. It depends on the…
Q: How do you calculate the heating surface of a boiler?
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Q: What are secondary sources and why are they important?
A: Secondary Source Definition and its importance.
Q: 1. Assess the limiting factors that impact on the economics of heat pumps. As an example, consider…
A: Heat Pumps is the Device used to maintain temperature as warm or cooling the house or building by…
Q: The Condenser of a refrigeration system rejects heat at a rate of 120 KW, while it's compressor…
A: Heat transfer is the form of energy that transfers from one system to another system by the virtue…
Q: Explain why a heat pump system is more cost-effective in winter season in Alaska but not in houses…
A: To explain: The reason that a heat pump system is more cost-effective in winter season in country A…
Q: b) A heat pump used to heat a house runs about one-third of the time. The house is losing heat at an…
A: Given Data Ql= 22000 kJ/h CoP= 2.8
Q: A refrigeration system uses a water-cooled condenser for rejecting the waste heat. The system…
A: Given data: The absorbed heat, QA = 21,000 Btu/h. The estimated coefficient of performance, COP =…
Q: What is the basic premise the Heat Pump technology relies on?
A: The detailed solution is given below:
Q: A parameter used to characterize the heat pump cycle performance is called the thermal efficiency.…
A: Heat pump: The device that is used for transfer heat is called a heat pump. Refrigerators and air…
Q: - (II) An ideal heat pump is used to maintain the inside temperature of a house at Tin = 22°C when…
A: Given data Inside temperature of house = Tin = 22 °Cheat pump does a work rate = 1700 WThe heat loss…
Q: A heat pump uses 100 J of energy as it operates for a given time. Isit possible for the heat pump to…
A: Heat pump is thermodynamic device which fetches or extracts heat energy from a thermal heat…
Q: A heat engine takes in 2.22E3 J of heat and does 8.50E2 J of work. How much heat is exhausted into…
A: Given Data: The heat input to the engine is Q=2.22×103 J. The work output of the engine is…
Q: - A heat rate of 36,000 kJ/hr. a. What is the COP of the heat pump if the power consumed is 1.7 kW?…
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Q: A refrigeration system uses a water-cooled condenser for rejecting the waste heat. The system…
A: Write the expression for power input in terms of COP.
Q: Define a refrigerator operating with its door open in a well-sealed and wellinsulated room.
A: A refrigerator operating with its door open in a well-insulated and well-sealed room. It can be…
Q: 68. The change of enthalpy in a heating chamber of dryer is 25 Btu and the mass of air supplied is…
A: As per our guidelines we are supposed to solve only one question if multiple questions are asked .…
Q: The device that receives heat energy from source and that rejects heat into sink is known as a. Heat…
A: The device that receives heat energy from source and that rejects heat into sink is known as a. Heat…
Q: 11-A maximum of 5 kW of power can be consumed for a heat pump. If the efficiency coefficient is…
A: coefficient of performance COP = Desired effect / work input required
Q: What are the beneficial and advantageous features of the developed AirDisc air-conditioner? Is this…
A: given; What are the beneficial and advantageous features of the developed Air Disc air-conditioner?…
Q: Why are today’s refrigerators much more efficient than those built in the past?
A: Given Modern refrigeration To find Modern refrigeration effectiveness
Q: Describe how a heat engine operates and sketch a diagram showing the main elements of this system.
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Q: (9) The coefficient of performance of a residential heat pump is 1.95. If the input power to this…
A: Given data:
Q: What are the computations needed when designing a boiler?
A: Boiler: A Boiler is a device that is used to transform the liquid into its superheated vapour by the…
Q: Thermodynamics: A refrigeration unit using Refrigerant-134a is used to maintain a certain space at…
A: Given Data Mw=0.2 kg/s Twi=35°C Two=15°C Condenser Inlet: 0.8 MPa, 40°C Condenser outlet:0.8 MPa,…
Q: Describe a refrigerator that violates the Clausius statement of the second law
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Q: An inventor claims to have developed a heat pump that runs between a sink at 273 K and a source at…
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Q: What would be the maximum COP for a heat pump operating in your house if the outside temperature is…
A: Given: To determine the maximum COP of the heat pump.
Q: You have a refrigerator in your garage. Does it perform differently in the summer than in the…
A: A fridge is simply not protected or made alright, to run in an exceptionally hot climate. When we…
Q: (9) The coefficient of performance of a residential heat pump is 2.85. If the input power to this…
A: Consider a heat pump whose source and sink temperatures be TH and TL respectively. Let qr be the…
Q: 10.) A heat pump used to heat a house runs about one-third of the time. The house is losing heat at…
A: GIVEN DATA - DESIRED EFFECT Q=24000KJ/h HEAT PUMP RUNS ONE-THIRD TIME COP =3 WE HAVE TO FIND POWER
Q: g coil in an air-conditioner is 0.7. The by-pass factor, if thres such cooling colls with the same…
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Q: Air conditioning units are sometimes placed on the roof of homes in the city. Occasionally, the air…
A: The phenomenon in which a vibrating framework or an outer force induces or drives another framework…
Q: What is the definition, application and importance of air conditioning system?
A: Air conditioning system definition: A process of cooling which is used to control the humidity,…
Q: A refrigeration system using refrigerant 22 is to have a refrigerating capacity of 60 TR. The…
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Q: When a refrigeration system's liquid line is noticeably hot instead of just being warm, it probably…
A: Liquid line of any refrigeration system is the line or pipe system which contains liquid refrigerant…
Q: consider the following: a) Do you think a heat pump system will be more cost-effective in New York…
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- Explain why a waterless, earth-coupled, closed-loop geo-thermal heat pump system is more efficient than a conventional closed-loop geothermal heat pump system.What are the approximate temperature ranges tor low-, medium-, and high-temperature refrigeration applications?Refrigerators currently being manufactured in the United States are using______as their refrigerant.
- What are the Difference of a Open Heater to a Closed heat exchanger?What is the heat source? Write briefly. What should be the characteristics of the heat sources used in heat pumps? Write.A A Single system has a cooling capacity of 6 tons. The discharge of the evaporator is at -20°C & 0.1 MPa and the discharge of the condenser is at 30°C & 1.0 MPa. Determine the following: (a) the COP of the system, (b) the Energy Efficiency Ratio in kJ/hr/W, (c) the HP/ton of the system, (d) the Refrigerating Efficiency of the system. Stage Vapor Compression (SSVC) refrigeration 20 우 6 4 + - 150 140- 170- T = 160°C OL 국100- 06- s= 2.30 kJ/(kg-k) 09 006 220 4- 30: 0001 00 08 1050 06 0g Saturated Vapor 60 09 8'0 1200 1.70 - 09'1 0.7 1250 90 1.50- 1.40 OL- 1350 8-1.30 - 07- 00L 0E 1.20 FOL -50 1450 09- 1.10 T=-40°C 00'L =08'0= Saturated Liquid 20 -06'0 4. 2. 0.80 0.70 1 PRESSURE, MPa 250 350 009 150 008 00L 007 R-134a 0.2 0.2 2.0 0.04 20'0 zo'o 0.01 009 00S 002 008 001 € Tiliner-Roth and Baehr (1994 ENTHALPY, kJ/kg o paseg SIN m paynduoo saguadod
- What is the advantage of using heat exchanger in plant designing compared to other heat transfer equipments?What type of heat exchanger is a waste heat boiler? Is it a regenerator or a recuperator? Choose only between the two.A surface condenser serving a 50,000-kW steam turbo-generator unit receives exhaust steam at the rate of 196,000 kg/hr. Vacuum in condenser is 702 mmHg. Sea water SG=1.03 and Cp=0.93 Btu/lb-F is used for cooling enters at 29.5C and leaves at 37.5C. From the steam condenser design, manufacturer consider 950 Btu/lb of steam condensed as heat given up cooling water. Calculate the required quantity of cooling water in m3/s.
- A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C, while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that QL = 26 kW. The compressor efficiency could range from 60 to 80 percent. Using ammonia (NH3) as the working fluid: 1. Determine the temperatures and pressures at the different points in the cycle (points 1, 2, 3, and 4). 2. Determine the coefficient of performance value and the mass flow rate of the working fluid. Please provide picture of tables if usedA refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C, while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that QL = 26 kW. The compressor efficiency could range from 60 to 80 percent. As part of the design, you should: 1. Specify and justify the constraints (isentropic efficiency, condenser, and evaporator temperature) you chose. 2. Show the cycle in relation to the two-phase region on a temperature-entropy (T-s) diagram. Please upload picture of tables if any are usedA refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C, while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that Q₁ = 26 kW. The compressor efficiency could range from 60 to 80 percent. This is to be completed individually. It would be highly unlikely for multiple students to select all the same design parameters in part (a). Expansion valve or capillary tube он Condenser Evaporator www. Compressor Work As part of the design, you should: a) Specify and justify the constraints (isentropic efficiency, condenser, and evaporator temperature) you chose. b) Show the cycle in relation to the two-phase region on a temperature-entropy (T-S) diagram.