HRAD 3473 WEEK 7 NOTES
HRAD 3473 WEEK 7 NOTES HRAD 3473
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This 4 page Class Notes was uploaded by Nichole Pike on Thursday September 29, 2016. The Class Notes belongs to HRAD 3473 at Oklahoma State University taught by Ryan in Fall 2016. Since its upload, it has received 5 views. For similar materials see Mechanical Equipment and Facility Management in Hotel and Restaurant Administration at Oklahoma State University.
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Date Created: 09/29/16
WEEK 7 HRAD 3473 DISCLAIMER: THESE NOTES WERE TAKEN FROM WHAT WAS RETAINED FROM CLASS LECTURE AND TEXTBOOK READINGS. THESE ARE IN NO WAY COMPREHENSIVE, BUT SHOULD BE USED IN CONJUNCTION WITH CLASS MATERIALS PROVIDED BY THE PROFESSOR. CHAPTER 5 WATER AND WASTE SYSTEMS CONTINUED VALVES each valve is designed for a specific purpose gateopens and closes; required for gas and typically used in shutoff systems gas valves are typically harder to turn off; maybe only turned off with screwdriver required by code for gas globe valvesadjust valvebathroom faucet (solenoid) electronic valvestimed automatic sinksfor sanitation icemaker ex. check valve or back flowwater can only go one direction to prevent contamination of water supply air gap is not a valve but it is a system prevents back up and contamination ASPECTS OF WATER hardness turbidityparticles are suspended in the water ex. of seeing all the way to ocean floor vs. Oklahoma lakes ironcan come from the pipes itself or from the ground taste and odor permeable materials PURIFYING AND FILTERING reverse osmosiswe take everything out of the water, all the particles, taste, odor and bubbles more pure than distilled water taking out the bubbleslose the minerals; salts, fluoride, etc. no nutritive value in the water crystal clear ice is reverse osmosisnot widely manufactured because of expense HARD WATER AND SOFTENING as water is traveling through the earth through aquifers, etc. it picks up calcium and magnesium salts (not harmful) HARD WATER, HEAT AND EVAPORATION Hard water system the whiteness around the sink is the calcium and magnesium particles that are left after the water dries 2 things that pull the particles out of the water and is left in things like laundry, etc. heat and soap which creates soap curds film is what is left on car after washing it; the calcium and magnesium there’s a lot of saving in soft water reducing chemical usage reduce soap usage reducing the amount of times equipment needs to be replaced you have to have a mechanical softening system in order to take out magnesium and calcium TYPES OF SEWER SYSTEMS two types of sewer systems (opposites) storm drain into another system: river, etc. sanitary WASTE WATER SYSTEMS sanitary sewer system does not operate with pressure we rely on slope and gravity in order for the system to work storm sewer system vent is a pipe that is attached to the sewer line to allow for air to help with draining; quicker and faster also allows for ventilating odors after decomposition away from us a trap is designed to create a barrier DISCHARGE/SEWER when these traps are dried up, odors will become apparent and will have to be dealt with SEWAGE REMOVAL preventive maintenance where you put good bugs (enzymes) into sewer system may have to pump sewage but in most cases it operates with gravity and flow PTRAP usually operates on a vertical system that goes into the wall STRAP operates in which it vertically discharged into the floor most commonly used with toilets strap holds the water and when flushed, it is overflowed over the trap and flows straight down GREASE TRAP AND PTRAP may have to collect grease before sending to sewer builtin to commercial kitchens SEWAGE TREATMENT uses a mechanical plant sewage comes in and is filtered; solids are separated from the effluent (liquid) solids are moved to drying bed and with care they can be repurposed into a variety of things the effluent is put into large tanks and through chemistry, water becomes safe to discharge into hydrologic cycle stot potable) but can be released into a river or ground can be seen in Tulsa off 75 on 71 sewage rates are high to build these systems for future capacity SEPTIC SYSTEM designed for an isolated property with no access to a city system smaller in nature and is focused on usage of one location goes into a big underground system solids sink to the bottom and the effluent is on the top effluent flows out into a distribution box which sends it to large pipes good bugs are placed into the box to break down solids chemicals dumped down the system and kill good bugs (ridex) and must be replaced or it will be clogged again no access to box LAGOON SYSTEM made for a larger location with no access to city system ex. of gas stations and such off of turnpikes or highways more of a static system; no irrigator but because of sunlight and fish, etc. the solids can be broken down and the effluent enters the system through evaporation ELECTRICITY PRINCIPLES ENERGY heat light sound we get all of these by changing energy; none of it is lost TRANSMISSION electricity is a commodity power grid allows electricity to flow through the country RESISTANCE the greater the resistance, the less electrons that flow the principle byproduct of resistance is heat CONDUCTIVITY we want things to conduct electricity better; we want less heat CIRCUIT defined as the path that electricity follows 3 C’s: Circuit, Current, conductivity DIRECT CURRENT conductivity and direction effect current currentmotion that electrons go in to our devices ELECTRICAL SYSTEMS CALCULATIONS volts=force amps=flow 0.04 causes pain to humans and higher amps can kill watts=use Electricity is sold in kilowatts Watts to kilowattsdivide Kilowatts to wattsmultiply
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