Using the SEER calculation, how much money would you spend to run your air conditioning system if it cost $.10 per Kw during the cooling season? 3 TON, 14 SEER unit. Remember the unit will run for about 976 hours during this season. $390.80 $450.30 $250.97 $100.00
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- It takes 104 hours to install a heating system in an office building. Theinstallers have already worked 36 hours. How many more hours are neededto finish the installation?Convert the following units The specific gravity if steel is 7.9 . What is the volumr in cubic feet of a steel in got weighing 2000 lb? Water is flowing through a 1.5 in diameter pipe with a velocity of 2ft/s. What is the kinetic energy of water in ft.lbf/lbm? Heat capacity for acetic acid can be calculated using the following: a. Cp=8.41+2.4346×10-5T ; b. Cp=J.mol-1°C-1 and T = °C. Please modify the formula so that the resulting expression has the associated units of kj.kmol-1 and T is in K.A heat pump consumes around 3 kW of power, minimum. If the outside temperature reached -2°C and the house should be kept at 23°C, how much heat does the house lose per minute? *Round off all answers to four decimal places*
- 3. Steam enter a turbine with an enthalpy of 1292 Btu/lb anf leaves with an enthalpy of 1098 Btu/lb. The transferred heat is 13 BTU/lb. What is the work in BTU/min an in h for a flow of 2 lb/sec? 3 decimal in final answer plsQ1: If a calorimeter is not assumed to be adiabatic, how would one calculate the heat transfer? Guide Questions: What are the parameters to be considered and the equations to be used? What law of thermodynamics does this transfer of heat to the surroundings touch? Is an adiabatic system automatically considered as a closed system? Please help me understand by also attaching a reference/book/journal article. This would help me in my essay. Thank you.When a stationary mass of gas was compressed without friction at constant pressure its initial state of 0.8 m3 and 0.105 MPa was found to change to final state of 0.40 m3 and 0.105 MPa. There was a transfer of 85 kJ of heat from the gas during the process.How much did the internal energy of the gas change ? * 1 Add File
- Round everything to 4 decimal places. Since Lucas is an engineer familiar with thermodynamics. He decided to create his own heat engine at home to avoid paying for electricity. He created a small, makeshift heat engine for trial. The combustion of his fuel, diesel, reaches a temperature of 750°C, while waste heat is disposed to the atmosphere at 50°C.He, then connected a generator and a heat pump to the heat engine to check the amount of power being produced. Assume that the heat pump will be used to warm his room to 25°C, while the outside temperature is at 5°C. Lucas’ rooms loses 85,000 kJ/hr of heat. And, 25% of the heat engine’s power output goes to the heat pump. How much diesel (in kg) needs to be burned by the heat engine to maintain the temperature in Lucas’ room? Assume carnot heat engine and heat pump. If the natural gas has a heating value of 22,000 BTU/lb,Given the table of results, find the following. Give answers in KW. Please use tables and state which table you used Please show all working out Rate of heat transfer to evaporator from the chilled water: Answer : 0.627 kW ✓ Rate of heat transfer from condenser to the cooling water: Answer : 0.81kW✓ Rate of heat transfer to refrigerant in “Evaporator” using enthalpy values: Rate of heat transfer from refrigerant in “Condenser” using enthalpy values Work input from the compressor to the refrigerant using enthalpy values. Answer: 0.470kW ✓ COP from enthalpy changes across work input and evaporator COP from motor electrical power input as work and rate of heat transfer to the chilled waterَQ1: To upgrade a ventilation system it is required that the air flow rate be increased from 200 m3/min to 300 m3/min. This is to be accomplished by increasing the angular velocity of the ventilation fan. If the current rpm=800, what rpm is required for the upgrade? What will be the power increase for the upgrade?
- If an engine that throws 200 kW of heat energy into the atmosphere produces 150 horsepower (hp), what is the efficiency of this engine? TIP: Horsepower is not included in the international unit system, you must convert it to kW.3. A heat engine operating between a geothermal steam source at 205°C and a riv- er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max- imum efficiency is it achieving?You have a job to upgrade a unit on a refrigerated trailer to the new R-134arefrigerant. You set the rates as follows: reclaiming the old R-12 so it can bedisposed, $17.00; flushing and replacing the seals on the system, $6.17; andrecharging the new system, $6.25. Labor involved is 3 hours at $23.00 anhour. There is no sales tax for this bill. Write a bill for this job.