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- Please find the highest thermal efficiency possible, while remaining within the boundaries. What is required: -Power produced must be at least 60 Mega Watts -Thermal efficiency must be greater than 36% -Back-work ratio must be smaller than 48% Assume: -air is the working fluid -specific heats vary with temperature (use table A-17) -Compressor inlet is at 1atm and 300k -the combustion process is isobaric and is modeled as a heat exchanger -Turbine exhaust is the same pressure as compressor inlet Compressor specifics: -Max volume flow rate (m^3/h) = 600,000 -Max outlet pressure (atm) = 12 -Isentropic efficiency = 90% Combustion chamber and gas tubine specifics (Note these come as a set) -Max pressure = 16.7 atm -Max temp = 1500 (celcius) -Turbine isentropic efficiency = 92% -Max heat rate = 230MW26. NA 25-g ice cube at 0.0°C is heated. After it first melts, the lemperature increases to the boiling point of water (100.0°C). and the water then boils to form 25 g of water vapor at 100.0 C. How much energy in total is added to the ice/water? Which Process (melting, increasing temperature, or boiling) requires e most energy? Water has a latent heat of vaporization of specific heat of 4190 J/(kg · K). fon ice cube of masswhat overall thermal system is this for in reference to part 1 , also could you also use numbers from a source for part 2 and do the calculations that way with actual reliable numbers , to make things easier to understand. And also part 2 is not complete as you need to complete performance optimisation of heat exchangers.
- Example(2): Double effect evaporator is used for concentrating a certain caustic soda solution 10000kg/hr from 9wt% to 47wt%. The feed at 30°C enters the first evaporator. Backward arrangement evaporators are used. steam is available at 167.7°C and the vapor space in the second effect is 14.6Kpa. The overall heat transfer coefficients of the two effects are 8380 and 6285kcal/ W.CH ork -conce -SOLFFF and-ans.. 112.1 а DiD 3 respectively and the specific heat capacity of all caustic soda solution 3.771 KJ/Kg. °C, determine the heat transfer area of each effect معدلة 5:48 م OA water tube boiler produces 250,000 pounds of steam per hour at 1200 psia and1000OF from feed water entering the boiler at 1500 psia and 360oF. Fuel oil havinga higher heating value of 18,200 Btu/lb is supplied to the burners at the rate of20,700 lb/hr. Furnace volume is 1500 cubic feet. Calculate the equivalentevaporation, lb/hrA. 300,117 B. 300,317 C. 300,517 D. 300,717Hi I need asisstance with a thermo review problem, Thank you! A heat exchanger is used to heat air. The air enters at 300 K with a flow rate of 5 kg/s. The air is heated by a separate stream of H2O that enters the heat exchanger at 300 kPa, saturated vapor and leaves as saturated liquid. If the H2O flow rate is 0.2 kg/s, determine the exit temperature of the air (K). Cpair=1.027 kJ/kgK. Note the air and H2O areseparate streams. No mixing occurs.
- DS Community Downl... Haritalar EOkuma list iş İÇİN Giriş yap 口 口山凸9 İNGİLİZCE An air-cooled condenser is used to condense isobutane in a dual geothermal power plant. Isobutane, air entering at 22 oC with a flow of 18 kg/s (cp = 1.0 kJ / kg.K)is condensed at 85 oC. The total heat transfer coefficient for this heat exchanger is 2400 W/m2.K and surface area is 2.6 m2. What is the output temperature of the air? Çeviri yap: Google Bing1. A heat exchanger is located on the roof of a warehouse to heat the air in winter. It is a coil-shaped pipe into which water vapor enters at 0.1 MPa and 300 °C and leaves with a quality of 30%. The warehouse has the following dimensions: 80m x 160m x 10m. The air must be heated from 5°C to 22°C. a. What must be the mass flow rate of the water to heat the air in less than half an hour? b. We want to cool the steam from the exchanger outlet and bring it up to 50 °C. For this, a mixing chamber with water at 20 °C is used, what will be the proportion of the steam mixture? c. The exchanger is damaged and only liquid water can be used at the same pressure (inlet T. 1 °C below saturation and outlet T. at 30°C). How long does it take to heat the air with the same flow of water?hand Wright
- 11. 30 tonnes of ice from and at 0°C is produced in a day of 24 hours by an ammonia refrigerator. The temperature range in the compressor is from 298 K to 258 K. The vapour is dry saturated at the end of compression and expansion valve is used. Assume a co-efficient of performance of 60% of the theoretical and calculate the power in kW required to drive the compressor. Latent heat of ice is 334.72 kJ/kg. Enthalpy Entropy of liquid Entropy of vapour kJ/kg Тетр. K kJ/ kg kJ/ kg K Liquid Vapour 298 100.04 1319.22 0.3473 4.4852 258 -54.56 1304.99 - 2.1338 5.0585 [Ans. 21.59 kW]Project 5: Automobile radiator, condenser, evaporator, air preheater, and cooling tower are common types of direct heat exchangers that also called recuperators. Recuperators may have different types based on the flow arrangement of the hot and cold fluid. Your role in a company that manufactures recuperators heat exchanger is to design a counter-flow recuperator (see Figure.6) that is used in heating, ventilation, and air conditioning (HVAC). Section.1: − Exhaust pipe is 88 ?? diameter. − Exhaust gas enters at 500??. − Water jacket is used and enters at 8??. − The surface heat coefficient of water and gas are ℎ????? = 300 ?/(?2.?) and ℎ??? = 1500 ?/(?2.?) , respectively. − Assume conduction transfer through wall is negligible. − The gas heat specific capacity is ?? is 1130 ?/(??.?). − The water heat specific capacity is ?? is 4190 ?/(??.?). − The flow rate of gas and water are 320 and 1500 ??/h, respectively. − The gas must be cooled to 100??. You need to design a counter-flow…Do not type