What is the payback time on a solar hot-water system that cost$ 5,000? Assume the system reduces electrical energy consumption by 4,000 kWhr each year and ilectricity costs 16 cents per kWhr. O 8 years O 4 years O 12 years O 15 years.

Q: thermal heat pump with a coefficient of performance of 1.3 supplies a building with 48000 BTU/hr of…

A: Given:COP of heat pump=1.3Heat supplied, Qa=48000 BTU/hrRate, R=$0.20/KWh

Q: Consider a residential heat pump use to maintain the inside air temperature of the house at 23C.…

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Q: How can a solar dish be used to produced electricity? O a. Connect to a stirling engine and a…

A: Solar dish is is concave dish which mirror on concave side to reflect the rays of sun ligh and…

Q: Heat is negative when energy is transferred to a system from its environment

A: Correct option is:

Q: Assume a system receives 10 kJ of heat, but then sheds half of it back to the environment. It also…

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Q: Calculate the total electrical energy consumed for a load usage of 6 fans (59 W each) for 9 hours a…

A: Write the load of each fan,   W=59 W   Calculate the total load for 6 fans,   Wtotal=6W=659…

Q: You have just learned 2™d law of thermodynamics and wanted to test your understanding by…

A: Note: As per policy, we can solve the first three subparts. Please resubmit the remaining part.…

Q: A piston-cylinder assembly contains 0.4 lb of air initially at a pressure of 30 lb/in² and a…

A: Given: mass, m = 0.4 lb T1 = 300 deg F P = 30 lbf/in2 Volume is doubled To find: Heat transfer Q12

Q: (a) Briefly explain why automotive batteries are not suitable for solar applications. (b) Design a…

A: Automotive batteries are not suitable for solar applications because they are designed for providing…

Q: ed on the given efficiency?

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Q: A-Classify the hydro-power stations according to the height of the water, then calculate the height…

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Q: What is Coefficient of Performance (COP)? Also differentiate between COP and Efficiency?

A: Coefficient of Performance is ratio of desired effect to the input work. It is also  called as…

Q: A homeowner in Allentown, PA installs a 60° south-facing solar collector that (on the average over…

A: Given Data, Power of electric heater = 1 KW Electricity rate = $0.11 per KWh Payback period =  5…

Q: A liquid has potential energy of 16.6 kJ at 6.1 m height. Then its mass is equal to kg. O 2.774 O…

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Q: What is the total energy produced by the PV .11 system in one year? (A) MWhr 350.4 (B) GWhr 3.285…

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Q: costs Tom and Jerry are each trying to sell you a heat engine. Both engines work between high and…

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Q: The Second Law of Thermodynamics is about the quality of energy. True O False

A: According to the study second law of thermodynamics different energy forms have different qualities.…

Q: Calculate the quantity of heat to be transderred in BTU to 2.81 kg of brass to raise its remperature…

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Q: versity campus has 200 classrooms and 400 faculty offices. The classrooms are equipped with 12…

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Q: What will happen to the rate of heat transfer? ZAH Difference between inside and outside…

A: Given questions are related to heat transfer. We have to find out if heat transfer will increase,…

Q: 4) A household refrigerator working on an irreversible refrigeration cycle rejects heat to the…

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Q: The most economic power plant, that has the maximum thermal efficiency Select one: OTrue False

A: as per given question we have defind true/false

Q: What is the Carnot efficiency of a typical geothermal plant and its power capacity in MW? The…

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Q: .Mexico's metro requires the implementation of an air conditioning system for each of its cars. On…

A: Given:Ti=45°CTf=25°CV=17 m x 2.5 x 2n=130v=0.06 m3/personQ=30 KJt=1 min

Q: he use of renewable solar energy becomes popular due to its free source. In your own opinion, is it…

A: Given:- Solar energy and fossil fuel To find:- Which one is economical

Q: A heat pump with a motor of 2 kW is used to keep a chicken hatchery at 30°C. This latter loses…

A: Given: The power of motor, W = 2 kW The temperature at the chicken hatchery, T1 = 30oC The heat loss…

Q: The energy received by a 2 x2 m solar collector whose normal is inclined at 45°to the sun. The…

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Q: A heat pump with COP of 2.0 is used to heat water to 90 °C for cleaning purpose. This heat pump…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: 1.) A potato slice that is 14" inch thick is placed on a pan that is 212F. The Btu slice has a…

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Q: 29. Ifi have a 12 square foot window with a U-factor of 0.28 and a SHGC of 0.4, what percent of…

A: Given dataArea of window = 12 ft2 = 11148.36 cm2SHGC = 0.4

Q: 1. A Camot heat engine receives heat from a reservoir at T(°C) at a rate of 11 kW Last one digit of…

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Q: The Ocean Thermal Energy Conversion (OTEC) system in Hawai utilizes the surface water and deep water…

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Q: How much collector area would a 1000-M

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Q: Explain the definition of power (Watt) and energy (Joule) in electricity.

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Q: An electric resistance heater is used to provide space heating at an efficiency level of 100%. The…

A: Space heating demand: 1137.8 MBHConversion factor: 1 MBH = 1000 BTU/hElectricity cost: $0.13 per…

Q: Design a solar PV powered system to generate 1000 kWh per day for a house located in Houston Texas.…

A: Given: Energy needs to produced using Solav PV = 1000 KWh Location of house = Houston Texas To…

Q: Explain the effect of temperature to the efficiency result of radiation

A: Radiation efficiency: The ratio of the power radiated to the net power accepted by any object is…

Q: Describe the mechanism of heat loss in the following scenarios. A computer chip on a motherboard is…

A: Given scenarios : A computer chip on a motherboard is cooled continuously using a small fan to…

Q: R Value: Wall: 0.961m2k/w Floor: 0.676m2k/w Roof: 0.7465m2k/w In a table format show with…

A: In order to calculate the potential savings from adding insulation, we must first convert the…

Q: The low efficiency of a system means an extra heat energy was added Ture O False O

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Q: The heat loss from a chicken coop (chicken house) is K(Tnside - Toutside) during the winter, where K…

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Q: In the following figure, If Q=0.00594 m/s, what is the output power delivered by the 100% efficient…

A: Consider motor as control volume. Assume fluid flowing is water. It's density is, ρ=1000 kg/m3 So,…

Q: A steady-state electric motor operates under 10 Ampere and 220 Volt operating conditions. The output…

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Q: Define the increase in the energy of a potato in an oven is equal to the amount of heat transferred…

A: Given Data: The heat transferred to the potato is Qin = 5 kJ. The change in the internal energy of…

Q: If 700 J of work are done in 7 seconds then which of the following is the average power produced?…

A: following is the answer to the above question-

Q: An inventor claims to have a solar powered heat pump that receives energy as heat from the sun at…

A: COP of given heat pump=Q2WNow,W=10KWQ1=7KWNow,Q1+W=Q2⇒Q2=(10+7)=17KW⇒COP=1710KW=1.7Since COP>1…

Q: Commercial Refrigerators are

A: A commercial refrigerator is refrigerator which is used as cold storage for various business items .…

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.