A Personal Energy Budget

Solve question 2 based on the answer of question 1.  You have a natural gas furnace in your home that used 78,500 cubic feet of natural gas for heating last winter. Your neighbor has a furnace that burns heating oil and used 516 gallons of heating oil last winter. You can convert the natural gas and heating oil consumption data into Btu to determine which home used more energy for heating. Natural gas BTU:  1,028 Btu per cubic foot Oil BTU: 138,590 Btu per gallon   Natural Gas BTU= 80,698,000  Oil BTU                = 71,512,440    The home that used a natural gas furnace used more energy for heating. 2.- You need a new furnace for your home, and you are comparing systems that use natural gas and heating oil. One factor to consider is the cost of the fuel. You can compare the price of the fuels on an equal basis by dividing the price per unit of the fuels by the Btu content per unit of the fuels to get a price per million Btu. Assume Natural gas price = $10.50 per thousand cubic…

The table below shows the melting point, specific heat, and heat of fusion of different solids. Suppose the same mass of these solids are at their respective melting point temperatures, which solid requires most amount of heat to melt? Substance Melting Point Heat of Fusion Specific Heat 79.71 cal/g 5.85 cal/g 21.07 cal/g 15.39 cal/g 31.98 cal/g 0.50 cal/gC° 0.033 cal/gC° 0.056 cal/gC° 0.030 cal/gCo 0.093 cal/gC° Ice 0°C Lead 327°C Silver 961°C Gold 1063°C Copper 1083°C O lead ice O gold O silver O O O O

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A system consisting of a power cycle and a heat pump cycle, each operating between hot and cold reservoirs whose temperature are 500 K and 300 K, respectively. All energy transfers are positive in the directions of the arrows. The accompanying table provides two sets of steady-state data, in kW. For each set of data, determine if the system is operating in accord with the first and second laws of thermodynamics. Power cycle QHQc W cycle (a) 60 40 20 (b) 120 80 40 Heat pump cycle QHQ'cW'cycle 60 20 80 20 80 100 Power cycle- Hot reservoir, TH= 500 K O'H J Qc o'c Cold reservoir, Te= 300 K W cycle Heat pump

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Q1 please

In a power plant operating with water and steam, the following measurements and observations were done at various stages along the system.  the pressure is 150 kPa and the enthalpy, h is 1580.115 (kJ/kg) For this case, the Temperature, in oC, is most likely:     250     105.97     111.35     130     116.04

Assume the following: ●In a light water reactor, approximately 1.0kg of spent nuclear fuel is produced for every50. megawatt-days (MWd) of thermal energy input. ●For the purposes of this analysis, assume the spent nuclear fuel produced is 1.8% Pu-240by mass. Pu-240 has a half-life of 6,430 years. ●The thermal efficiency of the power plant is 38% ●Use equation for radioactive decay: ​Q​t​= Q​0​^e​-kt​ where: ○Q​t​ = quantity of radioactive material at time t ○Q​0 ​= original quantity of radioactive material ○k = the decay constant ○t = time interval in years ○The decay constant k is defined by the relation: Half life = ln(2)/k   Diablo Canyon stores 95% of its spent nuclear fuel onsite. ii) How many metric tons of Pu-240 in the spent fuel will still be onsite in that year?

Part 1: Do the Analysis of the Ocean Thermal Gradient Power Plant shown below. Your Analysis will be easier to do in EES but it is up to you. Your EES program must be well documented and documentation in your code should reference system sketches. (The cycle and individual components) These sketches are done on attached engineering or typing paper, unless you are able to draw them in EES. You must validate your results with hand calculations on engineering paper that invoke the 1 and 2 Law from the perspective of the entire cycle, not the individual components. Of course, a system sketch is required. nd 1. An ocean thermal gradient power plant using a simple non-ideal Rankine Cycle operates with a peak boiler temperature of 70 °F and a condenser temperature of 40 °F. The warm surface water of the ocean is supplying the thermal energy to the boiler. Assume a high source temperature of 80 °F. The cooler water deeper in the ocean is the sink for heat rejection at the condenser. Assume a…

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Heat transfer question. Use one term approximation. Answers must be the following for each part: a. 120.6 ◦C b. 26.1 ◦C c. 69.5 ◦C d. 0.075 m

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Estimate the thermal properties of a food with the following composition: carbohydrate 17.1%, protein 2.1%, fat 0.1%, ash 0.9%, humidity 79.8%. a. Specific heat is based on the Siebel = Answer equation kJ / kg ° C. b. Specific heat is based on the Charm = Answer equation kJ / kg ° C. c. Specific heat is based on the Heldman & Singh = Answer equation kJ / kg ° C. d. Specific heat is based on the Choi & Okos = Answer equation kJ / kg ° C. e. Heat conductivity based on the equation Sweat = Answer W / m ° C. f. Heat conductivity based on the Choi & Okos = Answer equation W / m ° C. g. Heat diffusivity based on the Choi & Okos = Answer equation m² / s

On average, a pair of running shoes can last 18 months if used every day. The length of time running shoes last is exponentially distributed. What is the probability that a pair of running shoes last more than 15 months? Eighty percent of running shoes last at most how long if used every day?

To raise the temperature of 4.29 grams of H2O from -5.0∘C to 20.0∘C, which part of this heating process requires the most energy?  Pay attention to your units!

Estimate the thermal properties of food with the following composition: carbohydrate 14.5%, protein 0.2%, fat 0.6%, ash 0.3%, moisture 84.4%. a. Specific heat is based on the Siebel = Answer equationkJ / kg ° C. b. Specific heat is based on the Charm = Answer equationkJ / kg ° C. c. Specific heat is based on the Heldman & Singh = Answer equationkJ / kg ° C. d. Specific heat is based on the Choi & Okos = Answer equationkJ / kg ° C. e. Heat conductivity based on the equation Sweat = AnswerW / m ° C. f. Heat conductivity based on the Choi & Okos = Answer equationW / m ° C. g. Heat diffusivity based on the Choi & Okos = Answer equationm² / s.

Calculate the data from the table of thermodynamic properties of CO2 as an ideal gas

SECOND LAW OF THERMODYNAMICS write your soln. complete. draw a sketch and explain if necessesary THANK YOU! answer it in 1hr

Your house has an electric water heater. Several friends are visiting you over the weekend and they are taking consecutive showers. Assume that at the maximum heating level, the heater uses 50 kW of electricity. The water use rate is a continuous 4 gallons per minute with the new water saving showerhead you recently installed. Your very old showerhead had used 7 gallons per minute. You replaced the showerhead because you learned that heating water was the second highest energy use in your home. By slowing the flow of water through the heater, the water temperature should increase to a higher temperature. (a) What is the change in temperature (T) for the old showerhead? (b) What is the change in temperature (T) for the new showerhead? Assume the system is at steady sate, and all of the 50 kW energy used is heating the water.