What is the purpose of circulating water system in steam power plant? Classify circulating water systems. Which system is the most efficient?
Explain combination circulating water systems with advantages and disadvantages.
Why is the condensate subcooling not desired? How does terminal temperature difference influence the condenser design?
Differentiate between direct contact condenser and surface condenser. Mention uses of each type.
What is cogeneration? When cogeneration should be considered?
Name different NOxNO_xNOx reduction techniques. Mention the advantages and disadvantages of selective catalytic reduction technique of NOxNO_xNOx reduction.
What is the purpose of circulating water system in steam power plant? Explain closed loop circulating water system.
What is draft? Differentiate between forced draft and balanced draft system. Mention the advantages and disadvantages of these systems.
What are the factors to be considered for coal storage?
What is the main purpose of circulating water system? Draw the schematic diagram of closed loop circulating water system. How much could be the make-up water required for wet cooling tower operating on closed loop?
A natural draft cooling tower with a range of 10∘C10^{\circ}C10∘C receives 1.6×1061.6 \times 10^61.6×106 L/min of 35∘C35^{\circ}C35∘C circulating water. The outside air at 15∘C15^{\circ}C15∘C, 1 atm and 50% relative humidity. The exit air is at 25∘C25^{\circ}C25∘C saturated. Calculate (i) the amount of make-up water needed to compensate evaporation and (ii) the outside air required in m3/minm^3/minm3/min. Given, outside air density is 1.2 kg/m31.2 \text{ kg/m}^31.2 kg/m3. [cp=1.005 kJ/kg-Kc_p = 1.005 \text{ kJ/kg-K}cp=1.005 kJ/kg-K]
How in a coal fired power plant dust particle size affects dust collectors efficiency?
Why in steam power plant boiler makeup water is necessary and this water should be treated?
A condenser that handles 382 kg/sec of 90% steam quality at 0.08 bar, as well as 46 kg/sec of 45°C drain water from the feed water heater. Fresh cooling water is available at 20°C. Calculate the number of tubes required, cooling water flow rate, inner tube diameter and power required for cooling water flow rate. Given, tube outside diameter = 22mm, each tube length = 15m, two pass. Cooling water velocity = 2m/s. Overall heat transfer coefficient = 2 kW/m²-K. Terminal temperature difference = 3°C. Pressure drop in water boxes = 12.8cm H₂O, Pressure drop in tubes = 0.3cm water/cm.
A natural draft cooling tower with a range of 12°C receives 1,600,000 liter/min of 32°C circulating water. The outside air is at 15.5°C, 1 atm and 50% relative humidity. The exit air is at 26°C saturated. Calculate the amount of makeup water needed to compensate evaporation.
What is once-through boiler? How do it differ from drum boiler?
Why fill is used in wet cooling tower?
Cooling water enters a cooling tower at a rate of 1000 kg/hr and 70°C. Water is pumped from the base of the water at 24°C and some makeup water is added afterwards. Air enters the tower at 15°C, 50% RH, 1.013 bar, and is drawn from the tower saturated at 35°C, 1.013 bar. Calculate the flow rate of the dry air and makeup water required per hour. CpaC_{pa}Cpa = 1.005 KJ/kg.K.