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.

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.

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

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 27RQ: How many Btu/h would be produced in a 12-kW electricheater?

See similar textbooks

Related questions

Q: If the diameter with tolerance of the hole is 2.6 ±0.1 mm, which of the following is the safe…

A: Diameter with tolerance the hole =2.6 ± 0.1 mm To find: Safe diameter and tolerance of the shaft…

Q: The paint stirrer shown in the figure is made from a rod of length 76 and mass p per unit length.…

Q: An 1500 mm long, 43 mm aluminum square bar is rigidly supported on both ends (stress-free).…

Q: Liquid L D Liquid ammonia at -20°C ( rho= 665.1 kg/m³ and μ = 2.361*10-4 kg/m*s) is flowing through…

Q: A water hose with an internal cross section of 1.24 cm² is connected to a water tap. The hose leads…

Q: Which of the following options is consistent with the unit cell plane depicted below? a 88 a

A: Let first understand how FCC, SC and BCC crystal structures look alike SC- simple cubic structure…

Q: Noun Explanation (a)Pressure Control Circuits (b)Hydraulic System of Manipulators (c)The Approach…

A: Solution; Given Data: (a)Pressure Control Circuits (b)Hydraulic System of Manipulators (c)The…

Q: 3. A Pitot-static probe is used to measure the speed of an aircraft flying at 3000 m. If the…

Q: If the inertia is 80 lb-ft2, and the speed of the driven shaft is to be increased from 0 to 1500 rpm…

Q: <Chapter 10 section 4 Item 4 Sve stav The assembly consists of two pipes and a plate. (Eigure 1)…

Q: The friction coefficient for a boundary layer is given by the expression: Cf 1.32 √Rez If the…

Q: The Pitot static tube is used to measure the dynamic head. Select one:

A: Given:To determine whether the given statement is TRUE or FALSE.

Q: 4) Figure 4 shows three rods attached at the ends with hinges. The angular velocity of the rod AB is…

Q: Q2: A pressure cooker contains 1.5 kg of saturated steam at 5 bar. Find the quantity of heat which…

A: Given:Mass of steam, m=1.5 kgInitial pressure, P1=1.5 barFinal quality of steam, x2=0.6

Q: Ball B (10 kg) is on a rod on which a torque of M = (2t² + 4) Nm where t is in seconds. Fin the…

Q: b) Air flowing at a velocity of 'X' km/hr has a static pressure of 'P' kN/m² and a temperature of…

Q: 30. There are compressed isothermally 800 cfm (ft/min) of air measured at 80°F and 200 psia; p = 600…

A: P1=200 psiaP2=600 psiaT1=T2=80°Fv˙1=800 cfmv1=75 fpsv2=150 fps∆P=0

Q: Steam flows into a turbine at the rate of 10 kg/s and 10 kW of heat are lost from the turbine.…

Q: ven the lumped parameter model of a second-order system m ÿ +by+ky = F(t), what is the natural…

A: Given is the second order differential equation.

Q: If 10 kg/min of air are compressed isothermally from p1 = 96 kpa and V1 = 7.65 m3/min to p2 = 620…

Q: An ideal Diesel operates with a compression ratio of 14. The compression process begins with air at…

A: Givendiesel cycler=14T1=70oF=(70°F − 32) × 5/9 + 273.15 = 294.261KP1=15psiaT3=Tmax=3540oF=(3540°F −…

Q: Explain the placement for these item in the system: - Steam turbine - Gas turbine - Heat pump

A: Solution: Given Data: To Find: Explain the placement for these item in the system: - Steam turbine…

Q: What is the total required heating energy in raising the temperature of a given amount of water when…

Q: At section (1) Q₁ = 15 ft²/s P₁= 150 psi Find Fx Neglect Friction 0.5 ft pipe Density (8) = 1.94…

Q: A round bar made from SAE 1025 low Carbon steel is to support a direct tension load of 50,000 lbs.…

Q: olve the following questions: The bending moment M at a section of the loaded beam 200 mm to the…

A: Given:Length of the beam, L=600mm =0.6mUDl on th ebeam, w=6 kN/m

Q: In k-NN what will happen when you increase/decrease the value of k? Group of answer choices a. The…

A: To choose: The correct option. Explanation: High values of k take into consideration more…

Q: The square of the velocity of flowing fluid divided by twice the gravitational constant is the…

Q: A hollow steel tube with an outer diameter of 250 mm and thickness of 10 mm is used as a column to…

A: Given:Outer diamter of tube, D=250 mmThickness of the tube, t=10 mmWeight, W=260 kNLength of the…

Q: A proposed method for generating electricity from solar irradiation is to concentrate the…

A: Write the given data. qsol=7.10 MWE˙st=3.45 MWDs=1 mTsalt=Tm=1000 °C

Q: Part A: Find the steady-state solution of the mechanical system shown below: k HE E X F(0) F(t) = F…

A: The steady-state solution means a solution that is independent of time., it doesn't vary with time.…

Q: An ideal Brayton or gas turbine cycle with air as the working medium operates between pressures of…

Q: Determine the normal stress and shear stress acting on the inclined plane AB. Solve using Mohr's…

Q: A four bar mechanism PQRS with link PS fixed. The length of the links are PQ=4cm, QR=9cm, RS=5.5 cm…

A: Given: A four bar mechanism PQRS with link PS fixed. The length of the links are PQ=4cm, QR=9cm,…

Q: a) Air at 30°C (density=1.165 kg/m³, kinematic viscosity = 16x105 m²/s) flows over a flat plate at a…

A: According to question:- density of airρ=1.165kg/m3kinematic viscosity of airν=16×10-5m2/sfree-stream…

Q: Flow rate is the quantity of fluid flowing per unit length. Select one: True False O

A: According to the question we need to define flow rate.

Q: Consider the given state of stress. Given: X= 6 ksi and Y= 30 ksi. + 6 ksi The normal stress is…

Q: Each figure shows a mechanical device in which one or more forces are applied parallel to and away…

A: Given: Force acting at 150 mm above the axis of the horizontal beam: →F=800 N Because there is one…

Q: A+ Section Section Pump efficiency (np) = 80% Diameter (D)= Golm Calculate the power Pomp for a pump…

A: The diameter of section 1 is d1=0.1 m. The diameter of section 2 is d2=0.065 m. The velocity in…

Q: b. 20 kN/m B I'm 7m SOKN/m C Im

A: Given: For the 20 KN/m force the length is 1 m For the uniform variable force from 20 KN/m to 80…

Q: b) In a converging-diverging duct the flow conditions are such that a normal shock is formed at the…

Q: Prob # 4. Find the diameter of steel line shaft to transmit 10 hp at 150 rpm with a torsional…

A: Given: Power to be transmitted by shaft, P=1− hp Shaft Speed, N=150 rpmSoω=2πN60=2×π×15060=15.7…

Q: How to find the surface temperatures on the two ends of the board when the fins are shaped as…

Q: What are the benefits of CHP(combined heat & power) application? i need to do a presentation. can…

Q: A vertical, frictionless piston-and-cylinder arrangement contains 1 kg of steam at 25 bar, 260°C.…

A: Given:steam mass, m=1 kgpressure, P=25 barTemperature of steam, T=260o Cg=9.145 m/s2

Q: What is a heat pump and explains its purpose? (i need to do a presentation. can you explained to…

A: Given: What is a heat pump and explains its purpose?

Q: Water with mass of 2 kg (initial temperature of water is 10-degree C) and ice with mass of 6 kg…

Q: What is (or define) Reynolds Number? state the purpose of using the number?

A: Purpose of Reynolds No: the purpose of the Reynolds no is to predict the flow patterns in various…

Concept explainers

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.

Question

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.

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1 of 2.

VIEW

Step 2 of 2.

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

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

2) The energy consumed by a shower for 30 days is 22kwh. It is known that the resistance of the showerhead is 20 ohms and that its nominal current is 15A. So, what is the time in minutes that the shower was turned on during this period?
A photovoltaic system is installed. It is determined that the capacity factor of the installation is 21% over the course of a year. In that year it produced 7.73 MWh. What is the size of the installation (based upon a 365-day year)?
. a. A group of engineering students designs an electric heater with a power rating of 15 kW. If 10 kg of ice at 200 K is placed in the heater, how many minutes will it take to change ice to steam at 400 K. Assume 100% efficient.
A 2-m2 electric heater is used to heat the air above it. The surface of the heater is at 300°C while the surrounding air is at 40°C. The heater draws 240 V and 22 A and the heat transfer coefficient is 10 W/(m2K).a) What is the rate of heat transfer into the surrounding air in Watts? b) What is the energy conversion efficiency as a percentage (a number between 0 and 100)? Report your answer to one decimal place using rounding.
1d) A house has an electric resistance heater with an efficiency of 95%. The house is in a cold climate with heating requirement of 120 million BTU/year and no need for air conditioning in the summer. If a 14 costs $10700, what heat pump with an HSPF is the payback time in years (2 significant digits) for the heating savings compared to keeping the current resistance heater assuming electricity costs of $0.12/kWh?
Hi I need help with a thermo review question- thank you! A refrigerator transfers 6 kW of heat from the cold space at 277 K and transfers 10kW of heat to the surroundings at 300 K. a) Determine the Rate of Work input required (kW). b) Determine the Refrigerator Coefficient of Performance c) Determine the Coefficient of Performance if it’s a Carnot Refrigerator
A closed system receives 60 KỊ heat but its internal energy decreases by 30 KJ. Then the work done by the system is Select one: O a. 30 KJ O b. 90 KJ OC-90 KJ O d.-30 KJ
A pulley has 5 supporting lines and supports an 800N weight. A force of 190N is required to move the weight. What is the efficiency of the pulley?
What is the kilowatt output of an electric heater that has an ampere draw of 50 amperes if the voltage source is (a) 208 volts? (b) 240 volts?
How many Btu/h would be produced in a 12-kW electricheater?
An electric resistance heater is used to provide space heating at an efficiency level of 100%. The electricity is sold at $0.13 per kWh. Question: How much money is needed if 1137.8 MBH is demanded? Hint: 1 MBH equals 1,000 btuh
The heat loss from a chicken coop (chicken house) is K(Tnside - Totside) during the winter, where K is 1.5 kW/K. The chicken coop temperature can vary between 15 °C and 25 °C without harming egg production. A heat pump with a coefficient of performance of 40% of that of a reversible heat pump is used to heat the chicken coop. What are the minimum power requirements if the outside temperature is -5 °C? .