Econ Analysis and Dec Making

Thermo and Heat Transfer

Year B a l ance brought forward R&D Production Infrastructure Marketing cost Sales cost Cost of good sold Total Expense Sales Revenues Income Balance 1 $0.00 $120,000.00 $0.00 $0.00 $0.00 $0.00 $120,000.00 $0.00 ($120,000.00) ($120,000.00) 2 ($120,000.00) $80,000.00 $200,000.00 $50,000.00 $0.00 $200,000.00 $530,000.00 $300,000.00 ($230,000.00) ($350,000.00) 3 ($350,000.00) $0.00 $0.00 $30,000.00 $37,500.00 $500,000.00 $567,500.00 $750,000.00 $182,500.00 ($167,500.00) 4 ($167,500.00) $0.00 $0.00 $30,600.00 $39,750.00 $530,000.00 $600,350.00 $795,000.00 $194,650.00 $27,150.00 5 $27,150.00 $0.00 $0.00 $31,212.00 $42,135.00 $561,800.00 $635,147.00 $842,700.00 $207,553.00 $234,703.00 6 $234,703.00 $0.00 $0.00 $31,836.24 $44,663.10 $595,508.00 $672,007.34 $893,262.00 $221,254.66 $455,957.66 7 $455,957.66 $0.00 $0.00 $32,472.96 $47,342.89 $631,238.48 $711,054.33 $946,857.72 $235,803.39 $691,761.05 8 $691,761.05 $0.00 $0.00 $33,122.42 $50,183.46 $669,112.79 $752,418.67 $1,003,669.18 $251,250.51 $943,011.56 9 $943,011.56 $0.00 $0.00 $33,784.87 $53,194.47 $709,259.56 $796,238.90 $1,063,889.33 $267,650.44 $1,210,662.00 10 $1,210,662.00 $0.00 $0.00 $34,460.57 $56,386.13 $751,815.13 $842,661.83 $1,127,722.69 $285,060.86 $1,495,722.86 11 $1,495,722.86 $0.00 $0.00 $35,149.78 $56,386.13 $751,815.13 $843,351.05 $1,127,722.69 $284,371.65 $1,780,094.51 12 $1,780,094.51 $0.00 $40,000.00 $35,852.78 $56,386.13 $751,815.13 $884,054.04 $1,127,722.69 $243,668.65 $2,023,763.16 13 $2,023,763.16 $0.00 $0.00 $36,569.83 $56,386.13 $751,815.13 $844,771.10 $1,127,722.69 $282,951.60 $2,306,714.76 14 $2,306,714.76 $0.00 $0.00 $37,301.23 $56,386.13 $751,815.13 $845,502.49 $1,127,722.69 $282,220.20 $2,588,934.96 15 $2,588,934.96 $0.00 $0.00 $38,047.25 $56,386.13 $751,815.13 $846,248.52 $1,127,722.69 $281,474.18 $2,870,409.14 16 $2,870,409.14 $0.00 $0.00 $38,808.20 $45,108.91 $601,452.10 $685,369.21 $902,178.16 $216,808.95 $3,087,218.08 17 $3,087,218.08 $0.00 $0.00 $39,584.36 $36,087.13 $481,161.68 $556,833.17 $721,742.52 $164,909.35 $3,252,127.43 18 $3,252,127.43 $0.00 $0.00 $40,376.05 $28,869.70 $384,929.35 $454,175.10 $577,394.02 $123,218.92 $3,375,346.35 19 $3,375,346.35 $0.00 $0.00 $41,183.57 $23,095.76 $307,943.48 $372,222.81 $461,915.22 $89,692.41 $3,465,038.76 20 $3,465,038.76 $0.00 $0.00 $42,007.24 $18,476.61 $246,354.78 $306,838.63 $369,532.17 $62,693.54 $3,527,732.30 ‐ 1000000 ‐ 500000 0 500000 1000000 1500000 2000000 2500000 3000000 3500000 4000000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Balance ($) Year Cash Flow Balance Year Balance brought forward ‐ 300000 ‐ 200000 ‐ 100000 0 100000 200000 300000 400000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Income ($) Year Cash Flow Income Year Income

CHE | 374 | Econ Analysis and Dec Making | assessment | Year B a l ance brought forwar

CHE | 260 | Thermo and Heat Transfer | study guides | 

CHE | 374 | Econ Analysis and Dec Making | assessment | 

CHE | 260 | Thermo and Heat Transfer | exam | 

CHE 260 Thermodynamics and Heat Transfer Tutorial Problems - Week 10 1) Forced air at T ∞ = 25°C and V= 10 m/s is used to cool electronic elements on a circuit board. One such element is a chip, 4 mm x 4 mm, located 120 mm from the leading edge of the board. Experiments have revealed that flow over the board is disturbed by the elements and that the convection heat transfer is correlated by an expression of the form Nu x =0.04 Re x 0.85 Pr 1/3 Estimate the surface temperature of the chip if it is dissipating 30 mW. Answer: 43°C 2) Steel plates ( k =49.2 W/mK, c =549 J/kgK, ρ =7832 kg/m 3 ) with thickness 6 mm and length L =1 m on a side are conveyed from a heat treatmet process while being cooled by atmospheric air with velocity 10 m/s and temperature T ∞ =20°C in prallel flow over the plates. For an initial plate temperature of T i = 300°C what is the rate of heat transfer from the plates? What is the corresponding rate of of change of the plate temperature? Answer: 6780 W, -0.26°C/s 3) A pin fin of 10 mm diameter dissipates 30 W by forced convection to air in cross- flow with a Reynolds number of 4000. If the diameter of the fin is doubled and all other conditions remain the same, estimate the fin heat transfer rate. Assume the pin to be infinitely long. Answer: 70.4 W 4) An uninsulated steam pipe is used to transport high-temperature steam from one building to another. The pipe is 0.5 m in diameter, has a surface temperture of 150°C, and is exposed to ambient air at –10°C. The air moves in cross-flow over the pipe with a velocity of 5 m/s. What is the heat loss per unit length of the pipe? Answer: 3644 W/m

All courses in CHE

Popular Documents