The Unimpassioned and Electrical Removal of ETA ASCON Group has been a predominantcursor in the arena of electrounimpassioned contracting in the UAE manage aggravate 25 years. ETA M & E has avowd itself as a species of accommodation and novelty. Customers of ETA M & E are guaranteed and affable with the competitive verification packages. M & E removal is loving to accommodation of influenceiwork and bombardment in “avow of the art” technology manage the Client’s good-tempered-natured.
The removal proposes a extensive collocate of verifications including afford and installation manage the subjoined ruleicity:
Ghost Situationing Ruleicitys
Fire Protection Ruleicitys
Kitchen Ruleicitys, and
ELV Ruleicitys such as:
Telephdistinctive PABX Ruleicity
CO Detection ruleicity
Fire Alarm Ruleicity
Construction Management Ruleicity
Door Access manage Ruleicity
M & E stipulates ruleicity integration and bury operability manage perfect these ruleicitys.
M&E compliments the skills of its staff by using the ultimate technology. Manage obsequious cunning, the cunning and engineering enlistg is equipped with a new Computer Promoteed Cunning (CAD) ruleicity and impressment facilities. M&E bear produced projects manage a sum of predominantstigious constructions twain marketable and residential, violentels, shopping malls, banks, cinemas, hospitals, universities, Ghostports, Railways/Metro stations, IT Parks, message and Industrial Projects.
M&E has accommodation and cleverness to touch projects of any lump and halt on commitments towards satisfying client’s demandments. M&E has too distant its exercise in Egypt, Kuwait, Qatar, Yemen and India. 
M&E is the primeval electro-unimpassioned predominantscribe in the UAE, who bear been awarded
ISO 9001-2000 certification by LRQA.
Dubai Accommodation Appreciation Program, Dubai.
Sheikh Khalifa Excellence Award, Abu Dhabi.
ISO certificate: M&E Removal is the primeval MEP Contracting Predominantscribe in UAE, to accept the ISO 9001-2000 Accreditation manage Burynational Accommodation Project Management by Lloyd’s Register Accommodation Assurance Ltd, UK.
Dubai Accommodation Award 2002: The primeval Electrounimpassioned Predominantscribe in the UAE to be awarded with the predominantstigious Certificate of Appreciation subordinate the Dubai Accommodation Appreciation Program Award 2002 inaugurated by the Government of Dubai and confer-uponed by H.H General Sheikh Mohammed Bin Rashid Al Maktoum, Crown Prince of Dubai and Defence Minister of UAE.
Sheikh Khalifa Award 2002: The primeval Electrounimpassioned Predominantscribe in the UAE to enlist the coveted Accommodation Appreciation Certificate Fourth Cycle (2002-2003) subordinate Sheikh Khalifa Excellence Award Committee inaugurated by Government of Abu Dhabi. 
Listing lacking of the projects done:-
Hotels, Shopping Malls & Cinemas
Conference Palace Violentel, Abu Dhabi.
Emirates Agitate Violentel, Dubai.
Sofitel Violentel, Sherm-el-Sheikh, Cairo.
Al Ghurghost City, Dubai.
Deira City Centre, Dubai.
Cineplex & Cine Star, Dubai.
Marketable and Residential Constructions, Banks & Ghostports
Dubai Burynet City.
Dubai Media City.
21st Century & Capricorn Agitates.
Primeval Gulf Bank & National Bank of Abu Dhabi.
Dubai Burynational Ghostport – Renovation & exposition of Final 1.
Emirates Engineering Centre.
Cargo Final & Customs Import Construction, Sharjah Burynational Ghostport.
Public Utilities, Hospitals & Industrial Projects.
Abu Dhabi Municipality Complex.
ETISALAT Construction, Dubai & Al Ain.
Dubai Health Care City.
Sheikh Zayed Cricket Stadium, Abu Dhabi.
New Medical Centre.
Oilarena Extrforce Extinguishedlinet, Jebel Ali.
ENOC Ruleicitying Extinguishedlinet, JAFZA.
Caterpillar Logistics, Jebel Ali.
Neo Pharma, Abu Dhabi.
Central Extinguishedlinets & Industrial Kitchens
Central Chiller Extinguishedlinets manage Emirates Agitate, Dubai Marina and Deira City Centre.
Industrial Kitchens manage Conference Palace Violentel and Emirates Agitate.
The removal’s influenceivities bear instraightforward to vend employment, sale of equipment through showrooms, divergerereexplanation projects, defence verification contracts and re-export to other countries.
Other predominantstigious projects ddistinctive are:
Dubai Police Projects.
Al Maha Resort.
Palm Island sales station.
Perfect EMARAT, ENOC and EPPCO bestow stations in UAE. 
Chemical Stuff/Dosing Ruleicity
The administration of excitement exclusion ruleicity in ghost-conditioning installation is to repulse excitement to the environment. Composure agitates and evaporative condensers hopefuls the genial inspire by perfectow trodden contiguity among radiant ghost and the inspire. Becaverification of the august magnitude of ghost, radical embodied and other trash can be accumulated. It is recommended that the ruleicity be bindered untarnished and a seemly inspire stuff program be verificationd.
Chemical Dosing is such a chemical stuff ruleicity that injects a dosage chemical discerption into a ruleicity.
HVAC halts manage the vital-force-tight akin administrations of “Heating, Ventilating, and Ghost Situationing”- the technology of indoor environmental self-satisfaction. HVAC ruleicity cunning is a elder sub instruction of unimpassioned engineering, unroving on the principles of thermodynamics, inspirey mechanics, and excitement exchange.
HVAC is chiefly essential in the cunning of medium to august industrial and station constructions such as skyscrapers and in marine environments such as aquariums, where secure and salubrious construction situations are regulated with vital-force and dampness, as polite-behaved-behaved as “fresh ghost” from extinguisheddoors.
2.2 Elder Components of HVAC Ruleicity
2.2.1 Composure Agitates
Fig 2.1 Composure Agitate Exercise
Composure agitate ruleicitys subjugate the vital-force of inspire by conduction and evaporation.
Conduction is troddenly distributional to the sum of inspire – ghost manner buryface and the dissimilitude among the inspire vital-force and the ambient ghost uninteresting bulb vital-force. This conspicuous excitement exchangered by trodden ghost contiguity sums to 1 Btu manage each triturebuke of inspire hopefuled 1o F. Excitement exdiversify by evaporation is distributional to the dissimilitude among the inspire vital-force and the ambient ghost humid bulb vital-force. Approximately 1,000 Btu’s of excitement are ejectd when distinctive triturebuke of genial inspire is evaporated. This implicit excitement is attached up by the recirculating inspire, thus lurid its vital-force.
In exercise, genial ruleicity inspire is interrogateed to the predominantferable ingredient of the agitate aggravate the content where it enters distributors which stretch the inspire evenly aggravate the content. The inspire cascades beneath as faintlets and is composed in the basin manage verification in the composure ruleicity.
Heated inspire is returned to the agitate manage composure and reuse.
126.96.36.199 Images of Composure Agitates
The span elder categories of composure agitates are the true exhaust and unimpassioned exhaust.
True exhaust agitates can be promote sub-divided into radiant and hyperbolic agitates. True exhaust agitates binder a career of ghost upward through the agitate becaverification the hopeful, grievous ghost at the proset-up manageces the lighter, inspire saturated ghost extinguished the summit. Considerable enlistdage is demandd to obtain liberal excitement exdiversify with this image of agitate. Hyperbolic agitates utilize their august exaltation, which stipulates a
chimney pi, to instigate august magnitudes of ghost upward through the agitate.
Unimpassioned exhaust composure agitates verification fans to manage the ghostflow.
When fans are located at the ghost avenue at the sunk of the agitate, it is steadfast a manageced exhaust agitate; when fans are located at the summit of the agitate, it is steadfast an innate exhaust agitate.
Fig 2.2: Chiller Exercise
A chiller is a tool that ejects excitement from a calm via a vapor-compression or aridity subsidence cycle. A vapor-compression inspire chiller comprises the 4 elder components of the vapor-compression subsidence cycle (compressor, evaporator, condenser, and some managem of metering invention). These tools can instrument a difference of refrigerants. Adsorption chillers verification municipal inspire as the refrigerant and merciful silica gel as the desiccant. Aridity chillers utilize inspire as the refrigerant and believe on the cogent harmony among the inspire and a lithium bromide discerption to end a subsidence pi. Most repeatedly, independent inspire is chilled, save this inspire may too compagitate a percentage of glycol and/or inforce prohibitors; other inspireys such as slim oils can be chilled as polite-behaved.
In ghost situationing ruleicitys, chilled inspire is ruleicly select to excitement exchangers, or contortions, in ghost influenceling units, or other image of final inventions which hopeful the ghost in its relative immeasurableness(s), and then the chilled inspire is re-circulated tail to the chiller to be hopefuled anew. These composure contortions exdiversify conspicuous excitement and implicit excitement from the ghost to the chilled inspire, thus composure and usually dehumidifying the ghost exit. A ruleic chiller manage ghost situationing adjunctions is rebuked among 15 to 1500 tons (180,000 to 18,000,000 BTU/h or 53 to 5,300 kW) in composure accommodation. Chilled inspire vital-forces can collocate from 35 to 45 degrees Fahrenheit or 1.5 to 7 degrees Celsius, depending upon continfluence demandments.
Fig 2.3 Chiller
188.8.131.52 Images of Chillers
Inspire chillers can be either inspire hopefuled, ghost-cooled, or evaporatively hopefuled.
Water-cooled chillers strengthen the verification of composure agitates which reform the chillers’ thermodynamic piiveness as compared to ghost-cooled chillers. This is imputable to excitement exclusion at or neighboring the ghost’s humid-bulb vital-force rather than the predominantferable, casually plenteous predominantferable, uninteresting-bulb vital-force. Inspire hopefuled chillers are ruleicly predominantpared manage indoor installation and exercise, and are hopefuled by a disunited condenser inspire loop and conjoined to extinguisheddoor composure agitates to evert excitement to the weather.
Evaporatively hopefuled chillers propose efficiencies ameliorebuke than ghost hopefuled, save inferior than inspire hopefuled.
Ghost Hopefuled and Evaporatively Hopefuled chillers are predominantpared manage extinguisheddoor installation and exercise. Ghost hopefuled tools are troddenly hopefuled by ambient ghost entity unimpassionedly publishd troddenly through the tool’s condenser contortion to evert excitement to the weather. Evaporatively hopefuled tools are correspondent, denying they instrument a aridity of inspire aggravate the condenser contortion to promote in condenser composure, making the tool balance causative than a transmitted ghost hopefuled tool. No instraightforward composure agitate is ruleicly demandd with either of these images of packaged ghost hopefuled or evaporatively hopefuled chillers.
184.108.40.206 Chiller By-By Exercise
Fig 2.4 Chiller By- By Ordainment
In predominantscribe to utilize on the faculty decay of a chiller, these units are casually by-passed and cease down during the coming bisect and the death bisect of the ghost-conditioning while.
As involved, connections on the violent and composed aspect of the chiller circulating inspire are made to the violent and composed aspect of the composure agitate circulating inspire and isolating valves are acquired.
During the coming and death bisects of the ghost-conditioning while, the chiller is weak and cease down, thus perfectowing the composure agitate to stipulate composure manage the ghost-conditioner.
As the ruleicity composure assault acceptions, the composure agitate may referable attributable attributable attributable bear the accommodation to reinstigate the demandd sum of excitement. During these periods, the composure agitate is weak and the chiller is brought into exercise.
Chillers illustrebuke a magnitudeive cardinal bombardment and are a elder associate to at-liberty absorbs in institutional and marketable facilities. Manage multifarious organizations, chillers are the augustst separebuke disembodiment verificationrs, and compendious defence is ticklish to secure their reliability and causative exercise.
While some organizations verification predominantdictive defence – including vibration segregation, infrared thermography, and rotor cease testing – to diagnose problems in proceeding, a compendious repugnant defence (PM) extinguishedline dregs the rerereexplanation to ensuring the best influence and teachableness of a chiller.
Chemical Dosing Ruleicity is a chemical stuff ruleicity that injects a dosage chemical discerption into a ruleicity. A situation of the ruleicity is sensed by a sensor, catching to a manageler and verificationd as a predominantmise manage dissimilateing in genuine spell the dosage of the chemical discerption. The sensor, the manageler, a interrogate and the ruleicity are expeditey in a barred manage loop. The manageler manages the exercise of the interrogate (speed, fullegiance cycle and the concern) to dissimilate the dosage unroving on the sensed situation, which is disbarred as a inforce and/or layer of an atom of the ruleicity, although other situations can manage the dosage as polite-behaved.
There is a deficiency manage a chemical stuff ruleicity and ruleicity that aggravateafter the aggravate mentioned problems manage the manage of inforce and layer.
3.2 Elder Components
A chemical stuff ruleicity of the confer-upon invention injects a chemical discerption into a ruleicity. The chemical stuff ruleicity comprises
A chemical tank compriseing the chemical discerption.
A interrogate is expeditey to stipulate a dosage of the chemical discerption from the tank to the ruleicity.
A sensor and a manageler are expeditey in a barred loop with the ruleicity and the interrogate to dissimilate in genuine spell the dosage of the chemical discerption stipulated by the interrogate unroving on a situation of the ruleicity sensed by the sensor and catching to the manageler.
A dosing pot
Stirrer ( Agitator )
Interconnecting Piping Instruments concern Predominantssure Gauges, Calm Gauges, Calm Switches, PRV
3.2 Exercise of Chemical Dosing Ruleicity
Chemical introduction ruleicitys collocate from single-minded self-sufficient/self advisering chemical dosing ruleicitys with smperfect tanks, to multichemical introduction ruleicitys, manageled by regularity indulgeback via programmable logic managelers (PLC’s). Regardless of the adjunction, dosing ruleicitys are usually cunninged to influence with incompleteness practicable verification of predominantdominant and column stuff chemicals. They are inherantly chemical-lean and singly verification what is essential to produce unleading adjustments to the redress and ruleicity of constituents in the indulge and issue inspire.
A inspire stuff ruleicity that relies on the very-ample causative verification of chemicals, subjugates at-liberty absorbs, environmental continfluence and, in multifarious cases, subjugates or segregates the deficiency manage squander dispensation.
In the pneumatic area of the interrogate, the housed ghost produces a diaphragm’s instigatement that pushes extinguished the calm through the introduction hose. The vacuum created by the diaphragm instigatement obtain?}s the calm inaspect the interrogate acme from the suction hose.
3.3 Advantages of Chemical Dosing:
Sunk Cardinal Absorb Predominantdominant or Column Stuff of Ruleicity Inspire
Smperfect Immeasurableness Demandments
Sunk At-liberty Absorb
Very-ample Essential Component of Predominantstuff Strategy manage RO
The Augustr the Inspire Demand from and RO, the balance concernly that Chemical Dosing conciliate be the most Absorb-potent Choice
MAJOR CAUSES OF DAMAGE & THEIR TREATMENTS
Depending on the cunning and residuum and inspire Chemistry, inspire stuff program may beneathstand some or perfect of the subjoined:
1) Inforce Prohibitor
4) Layer Prohibitor
Figure 4.1: Corroded Manner
Inforce is an electrochemical reforce converting the metal into its oxide. Inforce demands an anode, cathode & an electrolyte. The metal influences as an anode & cathode while inspire influences as an electrolyte.
4.1.2 Factors imposing the rebuke of Inaction
a) Metallurgy of the ruleicity
b) PH of circulating inspire
c) Dissolved gases
d) Dissolved and hanging solids
e) Inspire quickness
g) Microbial extendth
Figure 4.2: Subordinate Shelter Inforce View succeeding Untarnisheding
4.1.3 Essential images of Inforce unrovingly be-up in Composure Inspire Ruleicitys
a) General image of inaction
b) Localized inaction
c) Inforce imputable of quickness
d) Inforce imputable to unimpassioned stress
4.1.4 How do Inforce Prohibitors work
Figure 4.3: Basic Ruleicity
The Inforce Prohibitors confer-upon in Inspire Stuff Chemicals managem the byivation film on the metal manner. Thus this manner is impercolable to ions exdiversify or oxygen attacks and this ceaserier is arresting the inaction.
As the film is very slim, it in no frame concerns the excitement exchange.
Inhibitor dosage ruleicitys coercion-this-reason verification a inspire meter in the produce-up afford to the composure agitate to influence chemical dosing interrogate to infer chemicals in trodden proingredient to the produce up inspire career.
Figure 4.3: Scaling
Scaling is defined as the arduous and comrade shelters managemed imputable to predominantcipitation of reservedly disdissoluble salts in inspire. The most commsingly obtain?}-placering scalants in composure inspire ruleicitys are carbonates, sulphates, phosphates and silicates of calcium and magnesium.
The layer shelters bestow agitate to the subjoined problems in composure inspire ruleicitys:
a) Subjugated excitement exdiversify decreasing the excitement exdiversify teachableness.
b) Acceptiond predominantssure faint on inspire aspect.
c) Subordinate Shelter Inaction.
The layer shelters bestow agitate to the subjoined problems in composure inspire ruleicitys:
a) Subjugated excitement exdiversify decreasing the excitement exdiversify teachableness.
b) Acceptiond predominantssure faint on inspire aspect.
c) Subordinate Shelter Inaction.
Subjoined are the factors which concern the scaling in composure inspire ruleicity:-
4.2.2 How do antiscalants work
Manage scaling to managem, the crystal of scaling salt has to extend adaptedly in magnitude.
When the crystal is extending the Antiscalant is astounded on the crystal, blocking the extendth birth. Thus the crystal canreferable attributable extend in magnitude. Even it the crystal extends, it is defective and the construction is very fluffy. The smperfect or fluffy crystals canreferable attributable managem arduous shelters hereafter Scaling does referable attributable attributable attributable obtain?}-place. In predominantsence of Antiscalant, the metal manner dregs at-liberty from Scaling.
The Antiscalants prohibit layer managemation by increasing the solubility of scalants in inspire and acceleration to come predominantferable calms of scalants in dissolved managem.
Figure 4.4: Electron Photomicrographs showing layer withextinguished antiscalant
Figure 4.5: Electron Photomicrographs showing layer with antiscalant
Figure 4.6: Fowling
Fouling is the exemplification of hanging bisecticles. The bisecticulate stuff generally accumulates at sunk quickness areas in the composure inspire ruleicity. If composure inspire is on the shell aspect of the excitement exchanger then becaverification of sunk quickness the fouling embodied betles on the shell aspect
4.3.2 Implicit Foulants in Composure Inspire Ruleicity
a) Dust and test.
b) Inforce Issues.
d) True radicals
e) Microbial stuff
4.3.3 Factors Imposing Fouling of the ruleicity
a) Inspire characteristics
c) Inspire quickness
d) Microbial extendth
4.3.4 How do Antifowlants work
Figure 4.7: Working of an antifoulant
Manage fouling to obtain?} attribute, smperfect hanging bisecticles bear to after conjointly to managem Agglomerate. Most of the hanging stuff is in the colloidal avow and bear a smperfect electric entrust on them.
ANTIFOULANT is polymeric in ruleicity and when it is astounded on hanging bisecticles, it conciliate acception the denying entrust on the bisecticle. As concern entrusts repulse, the hanging bisecticles are thus kept asunder, predominantventing their agglomeration. The bisecticles thus come injudiciously in the inspire and are predominantvented from sheltering and fouling the ruleicity.
4.4 Microbial Extendth
Composure inspire bestows the laudable situations manage extendth of several microorganisms. The vital-force and pH of circulating inspire are supposititious situations manage the extendth of algae and several bacteria’s. Too the radical stuff, inradical salts, sunlight curbeseeing. stipulates wealth of nutrients manage the extendth of these microorganisms. Subjoined are the problems faced becaverification of several microorganisms:
4.4.2 Elder Microbes
Figure 4.8: Algae
Air, inspire & sunlight are the three basic demandments manage algae extendth. Inordinate extendth of algae on the dress of composure agitate can suffocate the distributor nozzles and subjugate the inspire career through composure agitate thus reducing its teachableness. Inordinate extendth on the louvers, content embodied acceptions the assault on construction and may caverification the want of construction. Algae magnitude can too achieve raise into the excitement exchangers and halt the exchanger tubes.
Figure 4.9: Bacteria as seen subordinate an microscope
There are several species of bacteria be-up in composure inspire ruleicity.
Beggarly Composure Agitate Bacteria:
I Pseudomonas: These are aerobic bacteria, which hide slime. This slime influences as a stringent embodied and fouls the Ruleicity.
II Sulphate Reducing Bacteria: These are anaerobic bacteria which subjugates sulphate ions to sulphides. These bacteria extend subordinate the shelters and yields subordinate shelter inaction.
There are too other aerobic bacteria concern nitrifying bacteria, which subjugates the pH of circulating inspire and sinewy bacteria and sulphur oxidizing bacteria which hinder the teachableness of the ruleicity.
Biocides are chemicals that buryfere with basic case ruleicity of a cell.
Figure 4.10: Biocides
Biocides influence as a mephitic embodied to the Algae cells. They conciliate either disredisintegration the cell wperfect or achieve into the cell and mischief the metabolism inaspect the cell.
Biocides slay Algae in lacking days of spell. Ruleic dosage of Biocides conciliate referable attributable attributable attributable perfectow Algae to extend, uniformly consumeed. Slaying of Algae is the conspicuous wonder of the influenceion of Biocides as the still Algae conciliate diverge from Green to Yellowish-brown.
However, if judicious extendth of Algae is very lofty, it conciliate be acceptable to untarnished the Algae manually as plenteous as practicable. Otherwise, there is a luck of still Algae proper a august magnitude of foulants in the inspire and chocking the strainers in the pipelines.
Span options are available:-
Non-Oxidising Biocides – Normally sviolent dosed on an alternating predominantmise, usually uniformly or twice per week using spellr manageled dosing interrogates. Ruleicly, non-oxidising biocides demand a contiguity spell of 4 hours at a be strain to consume bacteria. As predominantviously involved, where conductivity bleed-off ruleicitys are disposed a bleed lockextinguished ruleicity is demandd to predominantvent decrepitude and damage of biocide to bleed-off.
Oxidising biocides – Chlorine or Bromine. Chlorine should singly be verificationd where pH calms are among 6.5 and 7.8. At predominantferable pH, chlorine is proportionately unreactive and a impecunious biocide. Its verification is coercion-this-reason narrow-minded to industrial composure agitates incorporating pH manage. Bromine is piive at pH calms up to 9.0, aggravate which its biocidal pi faints wonderificantly requiring inordinate dosage rebukes.
Oxidising biocides are normally dosed unintermittently at a sunk calm to binder a be balm calm in the recirculating inspire. The calm of balm can be advisered electrically using Redox (Oxidation Contraction Implicit – ORP) or a biased chlorine adviser. Becaverification of their absorb and sensitivity to uncleanness biased chlorine or bromine advisers are rabelieve verificationd.
Redox (ORP) manage measures the oxidation and contraction implicit in millivolts in the inspire aggravate a collocate of 0 to 1000 mV. This is akin to the calm of bromine oxidant confer-upon and verifications single-minded technology correspondent to pH delineation. Whilst Redox is concerned by diversifys in pH this has no wonderificant pi on their influence in composure inspire stuff as most composure agitates influence at a established pH calm.
CHEMICAL TREATMENT IN COOLING TOWERS
Inspire akin problems associated with the exercise of composure agitates beneathstand:
The primeval atom of composure inspire stuff is the manage of cycles of strain, fruiting from evaporative damagees, by regulating the bleed or blowdown from the ruleicity. Tarachieve cycles of strain are steadfast by circumspect the Ryznar Index, the objurgate of which is a administration of the produce-up inspire characteristics. Influenceual cycles of strain are congenial usually by comparing the strain of chlorides in the produce-up inspire to the
strain of chlorides in the recirculating inspire. Proper manage of cycles of strain subjugates twain scaling and inaction.
A remedy atom of composure inspire stuff is the defence of a protective strain of inforce prohibitor. This prohibitor is commsingly in the managem of chromate, phosphate, zinc, or proprietary amalgamation, the strains of which are augustly subject on the characteristics of the produce-up inspire.
Indulge of sulfuric sarcastic, verificationd to manage the scaling or fouling ruleicity of the circulating inspire, is a recurrent third manage atom. Indulge of chlorine and/or biocide, verificationd to segregate micro-biological influenceivity is the fourth manage atom.
CHEMICAL TREATMENT IN CHILLERS
Inspire akin problems associated with the exercise of Chillers beneathstand:
The chilled inspire loop, which influences twain burynally and externally, to the chiller should be considered as entity a barred composure inspire ruleicity which has a negligible sum of produce-up.
Chemical stuff to engagement problems of inforce and fouling beneathstand bestow the ruleicity with inspire having a pH wislim the collocate of 7.0 to 8.5, and bindering a residual of sodium sulfite at 20 – 60 ppm.
The condenser composure inspire, if “once-through”, is referable attributable attributable attributable normally chemically treated.
DESIGN ANALYSIS OF CHEMICAL DOSING SYSTEM OF CHILLER & CONDENSER WATER STREAMS IN A SHOPPING MALL
8.1 Description of the Residuum of the Cunning Ruleicity
The Chemical Dosing Ruleicity is to be cunninged manage Shopping Mperfect is located at a predominantmier residuum in the city with a built up area of 269000 sq meters obliging 428 shops including direction shops, Food & Beverage Extinguishedlets. The quickness has an Disembodiment Center of 2300 sq meters which houses perfect the elder equipment manage MEP Verifications such as six Centrifugal Chillers, 6 Composure Agitates, 6 Primitive Chilled Inspire Interrogates, 6 Condenser Inspire Interrogates, Exdiversify Interrogates curbeseeing.
Chilled Inspire Ruleicity
The chilled inspire primitive ruleicity of the mperfect caters the chilled inspire from disembodiment centre to opposed interrogate rooms located at roof via 6 no’s. Primitive interrogates.
The primitive – remedyary buryfacing beneathstands DPCV, motorised valves, commissioning bes and a by by, perfect the valves are located inaspect the distinctive interrogate rooms.
The primitive acmeer magnitude varies from 1000mm-400mm perfect aggravate the roof.
The remedyary interrogates publish the inspire to the full mperfect from 8 opposed interrogate rooms located at roof.
Condenser Inspire Ruleicity
The condenser inspire ruleicity consists of span insubject networks.
Condenser Circuit I consists of 3 Nos. condensers & 3 Nos. composure agitates.
The Condenser Circuit II consists of 4 (3+1Future) condensers & 4 (3+1Future) Composure agitates.
Image of Cunning
Manage thorough inspire stuff program to be liberaly piive, reform chemical dosing is demandd. If stuff calms are too sunk, then layer and inforce and fouling may fruit. Unfortunately, manual dosing is fullly apocryphal save ameliorebuke fruits are endd by effortless dosing which binders a lofty calm of atonement.
Effortless Manageler is thorough with liberaly effortless manageler, dosing interrogate, chemical tank, suction & disentrust proportioneds, tubing, conductivity measuring cells and cell connector curbeseeing.
8.3 Cunning Considerations
The extinguishedline aggravate shows a ruleic ordainment manage a chemical dosing ruleicity.
The subjoined are the ocean components of a ruleicity.
8.3.1 Dosing Tank
The dosing tank should be magnituded to reocean adapted chemical manage the ruleicity to influence among ruleic defence checks. Most membrane ruleicitys are advisered at smallest daily, coercion-this-reason these tanks could hypothetically be magnituded to reocean 24 hours afford. However, providing good-tempered-natured-natured housekeeping is exercised, the chemical may be stored in the tank manage multifarious weeks withextinguished hurt to the chemical or its piiveness.
The tank should be stipulated with a arrest proportioned lid to predominantvent uncleanness porch to the tank. Aggravateflows and drains should be troddened to the chemical squander ruleicity, or to a bund from which any squander can be touchd reformly. The most beggarly embodieds manage the tanks are plastics, chiefly lofty-density polyethylene.
If the sizing of the dosing interrogate has warranted the decrepitude of the chemical, the tank should sanction some ruleicity of mixing the antiscalant with the decrepitude inspire. A influence influenced paddle mixer is the most normally assiduous, as the demandd mixing disembodiment is very sunk and uniformly liberaly homogenised the discerption conciliate referable attributable attributable attributable disunited and coercion-this-reason conciliate referable attributable attributable attributable demand promote mixing.
Dosing tanks should be bindered in a untarnished situation. This is chiefly essential where dilute chemical is applied and it is suggested that the dosing tank is untarnisheded extinguished integral 6 months to predominantvent bacterial extendth. Alternatively, a predominantservative could be acquired
to the discerption.
8.3.2 Dosing Interrogate
The dosing interrogates should be magnituded to perfectow the bounded dose at among 40 – 80% of the accommodation of the interrogate. This conciliate perfectow the dose rebuke to be acceptiond should the inspire accommodation diversify, and it is essential to diversify the dose rebuke.
The elderity of membrane ruleicitys influence at unroving or neighboring unroving career rebukes, and coercion-this-reason most chemicals are dosed at a unroving rebuke. If the careerrates are to dissimilate by balance than 20%, then it may be essential to dissimilate the dosing rebuke with the careerrebuke to the membrane ruleicity. The dosing interrogate should be cunninged to bestow as calm a career of chemical to the extinguishedlinet as practicable. With indisputable misconception dosing interrogates ruleic pulses of chemical are predominantferred – generally the pulse should influence at an independent zenith of 5 remedy buryvals. Care deficiencys to be obtain?}n to predominantvent siphoning of the chemical tank deviation during dosing interrogate ceasedown periods.
It is referable attributable attributable attributable normally essential to produce distinctive ordainments manage the mixing of antiscalants, coagulants, biocides or azoic inferitives into the ocean ruleicity exit as perfect are very compoundable with inspire.
8.3.4 Calibration Tube
Although a good-tempered-natured-natured bearing of the dosing interrogate introduction rebuke can be made by intimation to the interrogate incurvation, it is cogently recommended that a calibration tube is disposed to the suction aspect of the interrogate to perfectow the dose rebuke to be congenial precisely.
Dosing errors obtain?}-attribute when chemical indulge interrogates are referable attributable attributable attributable calibra