air condition intro.

Slide 1: 

Training scopes HVAC : heating, ventilation and air condition

HVAC system function : : 

HVAC system function : Processing air to control simultaneously its temperature, humidity, cleanliness, and distribution to meet the requirements of the conditioned space Comfortable conditions: TDB= 75 F Ø = 50 %

HVAC System classification : 

HVAC System classification

air condition system classification : 

air condition system classification

Central AC : 

Central AC Air clod

Central AC : 

Central AC water clod

Mixed type : 

Mixed type Mixer Chiller AHU Cooled area Mixer Water filtration Cooling tours Feed water , Chilled water 12˚ c Chilled water 4-6˚ c Fresh air Return cooled air Air out Stem in & out

Slide 8: 

HVAC Equipment 3- split unit 3-AHU 6- pumps 7- boiler 4--FCU 5- Cooling towers 2- window unit 1- Chiller

Slide 9: 

Stand filter 1-sand filter 2-back wash 3- blower use 4- tank

The Impotent Of Sand Water Filtration : : 

The Impotent Of Sand Water Filtration : We can noted that the company used : boilers, chillers, cooling water,….. which is it's work depend on water. so the water quality is very important. Infiltrated water caused : 1- corrosion. 2- scale formation 3-slime growth. Problems caused by infiltrated water : 1-excessive energy consumption and deteriorating system performance. 2- This ineffkiency ultimately reflects in the poor performance of the main equipment such as air-conditioning. 3-It can also result in unscheduled shutdowns of the plant. The result is a loss of production and high costs of repair and maintenance. 4-decresd the equipment life

The chiller : 

The chiller 1-Function of chiller 2- Types ( vapor compression or absorption , air cold or water cold ) 4-Chiller components 3- working fluid ( water, eslan geckol )

The chiller : 

The chiller Chiller components Main component 1- Composer 2- Condensed 3- Evaporator 4- Expansion device Secondary component : 1- primary pump 2-secondary pump 3-oil pump 4-cooling tower 5- fans Accessories : 1-presure gage (Condensed & Evaporator) 2-temp. sensor 3-oil fitter

Slide 13: 

1-The compressor compresses the gas. The compressed gas heats up as it is pressurized (orange) 2-The coils on the back of the refrigerator let the hot gas dissipate its heat. The gas condenses into a liquid at high pressure. 3-The high-pressure liquid flows through the expansion valve. 4-the cooled gas cooling the water inside the shell Theory of operation Next pc ( 9000 RPM ,16000 RPM)

Slide 14: 

1-The compressor compresses the gas. The compressed gas heats up as it is pressurized (orange) 2-The coils on the back of the refrigerator let the hot gas dissipate its heat. The gas condenses into a liquid at high pressure. 3-The high-pressure liquid flows through the expansion valve. 4-the cooled gas cooling the water inside the shell Next pic

Slide 15: 

1-The compressor compresses the gas. The compressed gas heats up as it is pressurized (orange) 2-The coils on the back of the refrigerator let the hot gas dissipate its heat. The gas condenses into a liquid at high pressure. 3-The high-pressure liquid flows through the expansion valve. 4-the cooled gas cooling the water inside the shell Next pic

Slide 16: 

1-The compressor compresses the gas. The compressed gas heats up as it is pressurized (orange) 2-The coils on the back of the refrigerator let the hot gas dissipate its heat. The gas condenses into a liquid at high pressure. 3-The high-pressure liquid flows through the expansion valve. 4-the cooled gas cooling the water inside the shell Next pic

Slide 17: 

1 - Supply duct (Vibration ) 2 - Mixed (recalculated + outside) air duct 3-- Filter compartment 4 - Heating and/or cooling coil 2- Air Handing Unit

Slide 18: 

Cooling towers are evaporative coolers used for cooling water or other working medium to near the ambient wet-bulb air temperature Cooling towers use evaporation of water to reject heat from processes such as cooling the circulating water used in oil refineries, chemical plants, power plants and building cooling, for example. Cooling towers

Slide 19: 

Primary pump Centrifugal pump Used to supply water to the AHU Pumping system I- description & used

Slide 20: 

A centrifugal pump is a device whose primary purpose is to produce pressure by accelerating fluid particles to a high velocity providing them with velocity energy. What is velocity energy? It's a way to express how the velocity of objects can affect other objects, you for example. Have you ever been tackled in a football match? The velocity at which the other player comes at you determines how hard you are hit. The mass of the player is also an important factor. The combination of mass and velocity produces velocity (kinetic) energy. The Primary pump II- theory of operation

Slide 21: 

The Primary pump II- description & used Cavitation : is defined as the phenomenon of formation of vapour bubbles of a flowing liquid in a region where the pressure of the liquid falls below its vapour pressure

Slide 22: 

1- Types 2-Function boiler

Slide 23: 

Training scopes HVAC : heating, ventilation and air condition

Load estimation : 

Load estimation

Load estimation : 

Load estimation

1-Weather Form : 

1-Weather Form Out door conditions: Ex. Cairo TDB= 105 F Ø = 50 % T day range = 23 F EX: four sezon hotel

2- Survey : 

2- Survey Orientation of building Use of space Physical dimension of space Ceiling height Columns and beams Construction materials Surrounding conditions Windows: Doors Stairways, elevators and escalator People Lighting Motor Appliance Ventilation Thermal storage Continuous or intermittent operation

HEAT STORAGE : 

HEAT STORAGE

HEAT STORAGE & bulling weight : 

HEAT STORAGE & bulling weight

Slide 30: 

Solar gain – glass trans. Gain wall and roof trans. Gain except wall and roof

Solar gain – glass : 

Solar gain – glass Q1= area X peak heat gain X storage factor X shade factor Solar-trans. Gain wall and roof Q2= area X Equivalent temp. different X transmutation coffent (U) X correction factor

FAN gaincomputer = 220 W : 

FAN gaincomputer = 220 W

Location of equipments and services: : 

Location of equipments and services:

Ventilation : 

Ventilation space of ventilation CFM =