To account for water losses in the cooling tower part of

Assignment Help Mechanical Engineering

Reference no: EM13625817

The cooling water flow rate to the condensers of a big coal-fired power plant is 8,460 kg/s. The water enters the condensers at 29 C and leaves at 45 C. From the condensers, the water flows to a cooling tower, where it is cooled down back to 29 C by countercurrent contact with air. The air enters the cooling tower at the rate of 6,700 kg/s of dry air, at a dry-bulb temperature of 30 C and a humidity of 0.014 kg of water/of dry air. It leaves the cooling tower saturated with water vapor at 38 C.

(a) Calculate the water losses by evaporation in the cooling tower. The pressure in the tower is assumed to be constant at 101.3 kPa.

(b) To account for water losses in the cooling tower, part of the effluent from a nearby municipal wastewater treatment plant will be used as makeup water. The makeup water contains 530 mg/L of dissolved solids. To avoid fouling of the condenser heat-transfer surfaces, the circulating water is to contain no more than1,590 mg/L of dissolved solids. Therefore, a small amount of the circulating water must be deliberately discarded (blowdown). Windage losses from the tower are estimated at 0.2% of the recirculation rate. Estimate the makeup-water requirement.

Reference no: EM13625817

Questions Cloud

A circular coil has 200 turns a radius of 30mm and a : a circular coil has 200 turns a radius of 3.0mm and a current of 2.0a. if a proton is placed at the center of the coil

In a random sample of 1002 701 said they voted in a recent : in a random sample of 1002 701 said they voted in a recent presidential election.a find the best point estimate of the

A small fly of mass 030 g is caught in a spiders web the : a small fly of mass 0.30 g is caught in a spiders web. the web vibrates predominately with a frequency of 3.4 hz.what

Assume the population standard deviation is 95 sec : randomly selected statistics students of the author participated in an experiment to test their ability to determine

To account for water losses in the cooling tower part of : the cooling water flow rate to the condensers of a big coal-fired power plant is 8460 kgs. the water enters the

Specifically for this problem consider saturated water : it is desired to compare the results of property predictions for water near or in the saturation region using a the

The totals of the individual weights of garbage discarded : the totals of the individual weights of garbage discarded by 62 households in one week have a sample mean of 24.443 lb.

Air at 50 psia and 90 f flows at the rate of 16 lbms : air at 50 psia and 90 f flows at the rate of 1.6 lbms through an insulated turbine. if the air delivers 11.5 hp to the

Superkid finally fed up with superbullys obnoxious : superkid finally fed up with superbullys obnoxious behaviour hurls a 1.95-kg stone at him at 0.547 of the speed of

User Account

All Pages