Question

In: Mechanical Engineering

At steady-state, fuel oil is supplied at 0.01 gal/min to an oil furnace for home heating....

At steady-state, fuel oil is supplied at 0.01 gal/min to an oil furnace for home heating. (Note: 1 gal = 3.785*10^-3 m^3). The fuel oil density is 870 kg/m^3. Combustion air at 65°F and 1 atm enters the furnace with a volumetric flow rate of 15.2 ft^3/min. Determine the mass flow rate of combustion product gases flowing up the chimney flue. Also, determine the average velocity of the flue gas if the gas temperature is 225°F and the flue diameter is 9 in. Assume that the flue gases behave as an ideal gas with an apparent molecular weight of 29 kg/kmol. Also, assume that the pressure in the flue is essentially 1 atm (absolute).

Solutions

Expert Solution


Related Solutions

Question Methane gas (CH4) enters a home heating furnace operating at steady state and burns completely...
Question Methane gas (CH4) enters a home heating furnace operating at steady state and burns completely with 110% of theoretical dry air, each stream entering at 77 F, 1 atm. Combustion products are discharged to the flue at 300 F, 1 atm. Return air from the house enters at 60 F, 1 atm, with a volumetric flow rate of 1000 ft3 /min and is supplied to heat the house at 120 F, 1 atm. Kinetic and potential energy effects can...
1. In order to determine the size of a home-heating furnace, it is necessary to estimate...
1. In order to determine the size of a home-heating furnace, it is necessary to estimate the heat loss during the coldest day in winter. Provide the rates of heat loss per unit surface area for the following surfaces commonly encountered in house construction. You may assume an inside air temperature of 25°C, an outside temperature of -5°C, and heat transfer coefficients of 20 Wm-2K-1 and 5 Wm-2K-1 between air and the outside and inside surfaces, respectively. The thermal conductivities...
A double pipe heat exchanger is to be designed to cool 5 gal/min of hot oil...
A double pipe heat exchanger is to be designed to cool 5 gal/min of hot oil from 250°F to 120°F using 10 gal/min of cooling water available at 70°F. The heat exchanger is to consist of sections of 0.75 inch 16 BWG copper tubing inside 1.5 inch 16 BWG tubing; the water flows in the annular space. The shell-side heat transfer coefficient for this system is known to be 737 Btu/hr×ft2×°F. a) Estimate the required length of the countercurrent exchanger,...
In the market for "home heating" consumers typically have several options (e.g., electricity, heating fuel, natural...
In the market for "home heating" consumers typically have several options (e.g., electricity, heating fuel, natural gas, propane, etc.), yet we often think of firms in this industry as behaving like monopolists. Discuss the context in which your electricity provider is a monopolist. Is this characterization universally applicable? Explain your answer. Explain how a profit-maximizing monopolist chooses its level of output and the price of its goods. Even when allowed to collude, firms in an oligopoly may choose to cheat...
A furnace is fired with fuel oil with partial analysis of 7.6%S and 2.8%N. Orsat analysis...
A furnace is fired with fuel oil with partial analysis of 7.6%S and 2.8%N. Orsat analysis of the stack gas shows 9.44% CO2, 1.19%, 0.4% SO2, 0.47% H2, 6.8% O2 and 81.7% N2. Air is supplied at 23℃, 755 mmHg and 85% RH. Calculate a) % excess air; b) Analysis of the fuel oil; c) m3air/kg fuel.
4. When the price of home heating oil increases by 20%, the quantity demanded of home...
4. When the price of home heating oil increases by 20%, the quantity demanded of home heating oil decreases by 2% and the demand for wool sweaters increases by 10%. I) Calculate the elasticity of demand for home heating oil. II) Is the demand for home heating oil elastic or inelastic? Why? III) If the price of a wool sweater did not change, calculate the cross elasticity of demand for wool sweaters with respect to the price of home heating...
3.70 kg / min of air as ideal gas enters a steady state compressor that runs...
3.70 kg / min of air as ideal gas enters a steady state compressor that runs adiabatically. Air enters P1 = 300 kPa and T1 = 440 K and exits at P2 = 500 kPa. If the isentropic efficiency of the turbine is 0.876, what is the work, in kW?
Air enters a horizontal, constant-diameter heating duct operating at steady state at 280 K, 1 bar,...
Air enters a horizontal, constant-diameter heating duct operating at steady state at 280 K, 1 bar, with a volumetric flow rate of 0.25 m3/s, and exits at 325 K, 0.95 bar. The flow area is 0.05 m2. Assuming the ideal gas model with k = 1.4 for the air, determine: (a) the mass flow rate, in kg/s, (b) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer to the air, in kW
Temperature and Observations for Heating Curve. Time (Min) Temperature (°C) Observations 0 0 Solid state 1...
Temperature and Observations for Heating Curve. Time (Min) Temperature (°C) Observations 0 0 Solid state 1 0 Solid with a little liquid 2 1 Solid and liquid 3 4 Liquid and bits of solid 4 8 Liquid and a tiny solid 5 25 liquid 6 35 liquid 7 54 Liquid 8 68 Liquid 9 78 Liquid 10 92 Liquid 11 101 Liquid 12 104 Liquid& gas 13 104 Liquid& gas 14 104 Liquid& gas 15 104 Liquid& gas Questions C....
At steady state, 100 m^3/min of dry air at 32 C, 1 bar is mixed adiabatically...
At steady state, 100 m^3/min of dry air at 32 C, 1 bar is mixed adiabatically with a stream of oxygen at 127 C, 1 bar to form a mixed stream at 47 C, 1 bar. Kinetic and potential energy effects can be ignored. Find: (a) the mass flow rates of the dry air and the oxygen (b) the mole fractions of the dry air and oxygen in the exiting mixture (c) the time rate of entropy production
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT