The Spontaneous and Electrical Disdiscerption of ETA ASCON Group has been a omen in the scope of electrospontaneous contracting in the UAE restraint pit 25 years. ETA M & E has periodical itself as a prognostic of might and alteration. Customers of ETA M & E are guaranteed and amiable with the competitive advantage packages. M & E disdiscerption is abandoned to might of manipulation and siege in “propound of the art” technology restraint the Client’s amiable.
The disdiscerption proposes a spacious file of advantages including minister and installation restraint the subjoined course:
Motive Circumstancesing Courses
Fire Protection Courses
Kitchen Courses, and
ELV Courses such as:
Telephsole PABX Course
CO Detection course
Fire Alarm Course
Erection Management Course
Door Access coerce Course
M & E consummatepares course integration and inhume operability restraint whole these courses.
M&E compliments the skills of its staff by using the ending technology. Restraint complimentary drawing, the drawing and engineering execute-friendlyg is equipped with a late Computer Promoteed Drawing (CAD) course and draining facilities. M&E accept performed projects restraint a compute of consummatestigious erections twain marketable and residential, fieryels, shopping malls, banks, cinemas, hospitals, universities, Motiveports, Railways/Metro stations, IT Parks, despatch and Industrial Projects.
M&E has tonnage and cleverness to feel projects of any concretion and consist on commitments towards satisfying client’s demandments. M&E has to-boot expanded its influence in Egypt, Kuwait, Qatar, Yemen and India. 
M&E is the restraintemost electro-spontaneous assembly in the UAE, who accept been awarded
ISO 9001-2000 certification by LRQA.
Dubai Might Appreciation Program, Dubai.
Sheikh Khalifa Excellence Award, Abu Dhabi.
ISO certificate: M&E Disdiscerption is the restraintemost MEP Contracting Assembly in UAE, to choose the ISO 9001-2000 Accreditation restraint Inhumenational Might Project Management by Lloyd’s Register Might Assurance Ltd, UK.
Dubai Might Award 2002: The restraintemost Electrospontaneous Assembly in the UAE to be awarded with the consummatestigious Certificate of Appreciation befeeble the Dubai Might Appreciation Program Award 2002 started by the Government of Dubai and offered by H.H General Sheikh Mohammed Bin Rashid Al Maktoum, Crown Prince of Dubai and Defence Minister of UAE.
Sheikh Khalifa Award 2002: The restraintemost Electrospontaneous Assembly in the UAE to execute-friendly the coveted Might Appreciation Certificate Fourth Cycle (2002-2003) befeeble Sheikh Khalifa Excellence Award Committee started by Government of Abu Dhabi. 
Listing rare of the projects manufactured:-
Hotels, Shopping Malls & Cinemas
Conference Palace Fieryel, Abu Dhabi.
Emirates Aspire Fieryel, Dubai.
Sofitel Fieryel, Sherm-el-Sheikh, Cairo.
Al Ghurmotive City, Dubai.
Deira City Capital, Dubai.
Cineplex & Cine Star, Dubai.
Marketable and Residential Erections, Banks & Motiveports
Dubai Inhumenet City.
Dubai Media City.
21st Century & Capricorn Aspires.
Foremost Gulf Bank & National Bank of Abu Dhabi.
Dubai Inhumenational Motiveport – Renovation & comment of Marginal 1.
Emirates Engineering Capital.
Cargo Marginal & Customs Import Erection, Sharjah Inhumenational Motiveport.
Public Utilities, Hospitals & Industrial Projects.
Abu Dhabi Corporateity Complex.
ETISALAT Erection, Dubai & Al Ain.
Dubai Health Care City.
Sheikh Zayed Cricket Stadium, Abu Dhabi.
New Medical Capital.
Oilscope Extrrenewal Pur-poset, Jebel Ali.
ENOC Mannering Pur-poset, JAFZA.
Caterpillar Logistics, Jebel Ali.
Neo Pharma, Abu Dhabi.
Central Pur-posets & Industrial Kitchens
Central Chiller Pur-posets restraint Emirates Aspire, Dubai Marina and Deira City Capital.
Industrial Kitchens restraint Conference Palace Fieryel and Emirates Aspire.
The dissolution’s influenceivities accept expanded to dispose-of employment, sale of equipment through showrooms, inclinereanswer projects, livelihood advantage contracts and re-export to other countries.
Other consummatestigious projects manufactured are:
Dubai Police Projects.
Al Maha Resort.
Palm Island sales appointment.
Whole EMARAT, ENOC and EPPCO satisfrenewal stations in UAE. 
Chemical Subject/Dosing Course
The exercise of ebullition repudiation course in motive-conditioning installation is to renounce ebullition to the environment. Composure aspires and evaporative condensers timids the fiery introduce by wholeow usualed adjunction among divine motive and the introduce. Becainterpretation of the vast extent of motive, fundamental denoteative and other dregs can be accumulated. It is recommended that the course be confideed clear and a appropriate introduce subject program be interpretationd.
Chemical Dosing is such a chemical subject course that injects a dosage chemical discerption into a manner.
HVAC consists restraint the existence-tight akin exercises of “Heating, Ventilating, and Motive Circumstancesing”- the technology of indoor environmental self-approval. HVAC course drawing is a deep sub punishment of spontaneous engineering, installed on the principles of thermodynamics, liquescent mechanics, and ebullition remand.
HVAC is chiefly momentous in the drawing of pit to vast industrial and appointment erections such as skyscrapers and in marine environments such as aquariums, where certain and hearty erection stipulations are regulated with weather and humidity, as well-behaved-mannered-mannered-mannered as “fresh motive” from quencheddoors.
2.2 Deep Components of HVAC Course
2.2.1 Composure Aspires
Fig 2.1 Composure Aspire Influence
Composure aspire courses diminish the weather of introduce by conduction and evaporation.
Conduction is usualedly interrelationshipal to the aggregate of introduce – motive exterior inhumeface and the distinction among the introduce weather and the ambient motive existenceless bulb weather. This conscious ebullition remandred by usualed motive adjunction aggregates to 1 Btu restraint each bruise of introduce timided 1o F. Ebullition remand by evaporation is interrelationshipal to the distinction among the introduce weather and the ambient motive humid bulb weather. Approximately 1,000 Btu’s of ebullition are migrated when sole bruise of fiery introduce is evaporated. This inapparent ebullition is abandoned up by the recirculating introduce, thus dark its weather.
In exercise, fiery manner introduce is interrogateed to the eminent piece of the aspire aloft the swell-mannered where it enters distributors which distribute the introduce evenly pit the swell. The introduce cascades befeeble as emanatelets and is calm in the basin restraint interpretation in the composure course.
Heated introduce is returned to the aspire restraint composure and reuse.
188.8.131.52 Ideas of Composure Aspires
The span deep categories of composure aspires are the spontaneous drain and spontaneous drain.
Spontaneous drain aspires can be further sub-divided into divine and hyperbolic aspires. Spontaneous drain aspires confide a current of motive upward through the aspire becainterpretation the timid, stupid motive at the depth restraintces the lighter, introduce saturated motive quenched the apex. Considerable execute-friendlydage is demandd to terminate generous ebullition remand with this idea of aspire. Hyperbolic aspires utilize their palliable crisis, which consummatepares a
chimney issue, to impel vast extents of motive upward through the aspire.
Spontaneous drain composure aspires interpretation fans to coerce the motiveflow.
When fans are located at the motive entry at the shameful of the aspire, it is named a restraintced drain aspire; when fans are located at the apex of the aspire, it is named an redundant drain aspire.
Fig 2.2: Chiller Influence
A chiller is a besidesl that migrates ebullition from a mitigate via a vapor-compression or aridity subsidence cycle. A vapor-compression introduce chiller comprises the 4 deep components of the vapor-compression subsidence cycle (compressor, evaporator, condenser, and some restraintm of metering symbol). These besidesls can instrument a multiplicity of refrigerants. Adsorption chillers interpretation corposcold introduce as the refrigerant and kind silica gel as the desiccant. Aridity chillers utilize introduce as the refrigerant and lean on the sinewy interconnection among the introduce and a lithium bromide discerption to terminate a subsidence issue. Most continuously, undefiled introduce is chilled, barring this introduce may to-boot confide a percentage of glycol and/or indolence checkmateors; other liquescents such as lean oils can be chilled as well-behaved-mannered-mannered.
In motive circumstancesing courses, chilled introduce is naturally arrangely to ebullition exchangers, or involutions, in motive indexling units, or other idea of marginal symbols which timid the motive in its appertaining interval(s), and then the chilled introduce is re-circulated end to the chiller to be timided continuously. These composure involutions remand conscious ebullition and inapparent ebullition from the motive to the chilled introduce, thus composure and usually dehumidifying the motive current. A natural chiller restraint motive circumstancesing appositions is scoldd among 15 to 1500 tons (180,000 to 18,000,000 BTU/h or 53 to 5,300 kW) in composure tonnage. Chilled introduce weathers can file from 35 to 45 degrees Fahrenheit or 1.5 to 7 degrees Celsius, depending upon continfluence demandments.
Fig 2.3 Chiller
184.108.40.206 Ideas of Chillers
Introduce chillers can be either introduce timided, motive-cooled, or evaporatively timided.
Water-cooled chillers solder the interpretation of composure aspires which reconstitute the chillers’ thermodynamic issueiveness as compared to motive-cooled chillers. This is attributable to ebullition repudiation at or adjacent the motive’s humid-bulb weather rather than the eminent, casually abundant eminent, existenceless-bulb weather. Introduce timided chillers are naturally consummatepared restraint indoor installation and influence, and are timided by a disjoined condenser introduce loop and conjoined to quencheddoor composure aspires to disadvise ebullition to the sphere.
Evaporatively timided chillers propose efficiencies emend than motive timided, barring inferior than introduce timided.
Motive Timided and Evaporatively Timided chillers are consummatepared restraint quencheddoor installation and influence. Motive timided besidesls are usualedly timided by ambient motive entity spontaneously referableifyd usualedly through the besidesl’s condenser involution to disadvise ebullition to the sphere. Evaporatively timided besidesls are congruous, bar they instrument a moisture of introduce pit the condenser involution to promote in condenser composure, making the besidesl past fruitful than a unwritten motive timided besidesl. No inplain composure aspire is naturally demandd with either of these ideas of packaged motive timided or evaporatively timided chillers.
220.127.116.11 Chiller By-By Influence
Fig 2.4 Chiller By- By Ordainment
In arrove to utilize on the might decsuccession of a chiller, these units are casually by-passed and consummateclude down during the coming portio and the bying portio of the motive-conditioning occasion.
As involved, connections on the fiery and unimpassioned party of the chiller circulating introduce are made to the fiery and unimpassioned party of the composure aspire circulating introduce and isolating valves are borrowed.
During the coming and bying portios of the motive-conditioning occasion, the chiller is unartificial and consummateclude down, thus wholeowing the composure aspire to consummatepare composure restraint the motive-conditioner.
As the course composure raise enlargements, the composure aspire may referable accept the tonnage to reimpel the demandd aggregate of ebullition. During these periods, the composure aspire is unartificial and the chiller is brought into influence.
Chillers denote a strong principal siege and are a deep attendant to detached demands in institutional and marketable facilities. Restraint sundry organizations, chillers are the vastst sole existence interpretationrs, and ample livelihood is nice to fix their reliability and fruitful influence.
While some organizations interpretation ominous livelihood – including wave segregation, infrared thermography, and rotor bar testing – to diagnose problems in remove, a ample destructive livelihood (PM) pur-pose debris the rereanswer to ensuring the best deed and obtainingness of a chiller.
Chemical Dosing Course is a chemical subject course that injects a dosage chemical discerption into a manner. A circumstances of the manner is sensed by a sensor, transmitted to a coerceler and interpretationd as a plea restraint transmuteing in true period the dosage of the chemical discerption. The sensor, the coerceler, a interrogate and the manner are compliant in a betled coerce loop. The coerceler coerces the influence of the interrogate (speed, calling cycle and the relish) to transmute the dosage installed on the sensed circumstances, which is dissettled as a indolence and/or lamina of an atom of the manner, although other stipulations can coerce the dosage as well-behaved-mannered-mannered.
There is a insufficiency restraint a chemical subject course and course that pitfolfeeble the aloft mentioned problems restraint the coerce of indolence and lamina.
3.2 Deep Components
A chemical subject course of the offer figment injects a chemical discerption into a manner. The chemical subject course comprises
A chemical tank confideing the chemical discerption.
A interrogate is compliant to consummatepare a dosage of the chemical discerption from the tank to the manner.
A sensor and a coerceler are compliant in a betled loop with the manner and the interrogate to transmute in true period the dosage of the chemical discerption consummatepared by the interrogate installed on a circumstances of the manner sensed by the sensor and transmitted to the coerceler.
A dosing pot
Stirrer ( Agitator )
Interconnecting Piping Instruments relish Consummatessure Gauges, Flatten Gauges, Flatten Switches, PRV
3.2 Influence of Chemical Dosing Course
Chemical injection courses file from pure self-sufficient/self advisering chemical dosing courses with smwhole tanks, to multichemical injection courses, coerceled by manner healback via programmable logic coercelers (PLC’s). Regardless of the apposition, dosing courses are usually drawinged to produce with reserve virtual interpretation of consummate and column subject chemicals. They are inherantly chemical-lean and solely interpretation what is certain to execute inferior adjustments to the pit and sort of constituents in the heal and work introduce.
A introduce subject course that relies on the extremely fruitful interpretation of chemicals, diminishs detached demands, environmental impression and, in sundry cases, diminishs or cast-outs the insufficiency restraint dwindle ordainment.
In the pneumatic area of the interrogate, the compressed motive produces a diaphragm’s impelment that pushes quenched the mitigate through the gift hose. The vacuum created by the diaphragm impelment chooses the mitigate inparty the interrogate gathering from the suction hose.
3.3 Advantages of Chemical Dosing:
Feeble Principal Demand Consummate or Column Subject of Manner Introduce
Smwhole Interval Demandments
Feeble Detached Demand
Extremely Momentous Component of Consummatesubject Strategy restraint RO
The Vastr the Introduce Demand from and RO, the past relishly that Chemical Dosing obtain be the most Demand-potent Choice
MAJOR CAUSES OF DAMAGE & THEIR TREATMENTS
Depending on the drawing and colony and introduce Chemistry, introduce subject program may belowstand some or whole of the subjoined:
1) Indolence Checkmateor
4) Lamina Checkmateor
Figure 4.1: Corroded Exterior
Indolence is an electrochemical rerenewal converting the metal into its oxide. Indolence demands an anode, cathode & an electrolyte. The metal influences as an anode & cathode while introduce influences as an electrolyte.
4.1.2 Factors imposing the scold of Indolence
a) Metallurgy of the course
b) PH of circulating introduce
c) Dissolved gases
d) Dissolved and pendulous solids
e) Introduce quickness
g) Microbial gain-groundth
Figure 4.2: Befeeble Confidence Indolence View subjoined Clearing
4.1.3 Momentous ideas of Indolence continuously ground in Composure Introduce Courses
a) General idea of indolence
b) Localized indolence
c) Indolence attributable of quickness
d) Indolence attributable to spontaneous stress
4.1.4 How do Indolence Checkmateors work
Figure 4.3: Basic Manner
The Indolence Checkmateors offer in Introduce Subject Chemicals restraintm the byivation film on the metal exterior. Thus this exterior is impermeable to ions remand or oxygen attacks and this distribution is arresting the indolence.
As the film is very lean, it in no practice influences the ebullition remand.
Inhibitor dosage courses consequently interpretation a introduce meter in the execute-up minister to the composure aspire to produce chemical dosing interrogate to gather chemicals in usualed propiece to the execute up introduce current.
Figure 4.3: Scaling
Scaling is defined as the difficult and comrade confidences restraintmed attributable to consummatecipitation of charily disdissoluble salts in introduce. The most commsolely befallring scalants in composure introduce courses are carbonates, sulphates, phosphates and silicates of calcium and magnesium.
The lamina confidences grant ascend to the subjoined problems in composure introduce courses:
a) Diminishd ebullition remand decreasing the ebullition remand obtainingness.
b) Enlargementd consummatessure emanate on introduce party.
c) Befeeble Confidence Indolence.
The lamina confidences grant ascend to the subjoined problems in composure introduce courses:
a) Diminishd ebullition remand decreasing the ebullition remand obtainingness.
b) Enlargementd consummatessure emanate on introduce party.
c) Befeeble Confidence Indolence.
Subjoined are the factors which influence the scaling in composure introduce course:-
4.2.2 How do antiscalants work
Restraint scaling to restraintm, the crystal of scaling salt has to gain-ground amplely in extent.
When the crystal is gain-grounding the Antiscalant is astounded on the crystal, blocking the gain-groundth residence. Thus the crystal canreferable gain-ground in extent. Even it the crystal gain-grounds, it is rude and the construction is very fluffy. The smwhole or fluffy crystals canreferable restraintm difficult confidences hence Scaling does referable befall. In consummatesence of Antiscalant, the metal exterior debris liberal from Scaling.
The Antiscalants checkmate lamina restraintmation by increasing the solubility of scalants in introduce and acceleration to stop eminent flattens of scalants in dissolved restraintm.
Figure 4.4: Electron Photomicrographs showing lamina withquenched antiscalant
Figure 4.5: Electron Photomicrographs showing lamina with antiscalant
Figure 4.6: Fowling
Fouling is the confidenceion of pendulous portioicles. The portioiculate subject generally accumulates at feeble quickness areas in the composure introduce course. If composure introduce is on the shell party of the ebullition exchanger then becainterpretation of feeble quickness the fouling denoteative betles on the shell party
4.3.2 Virtual Foulants in Composure Introduce Course
a) Dust and scrutinize.
b) Indolence Works.
d) Spontaneous fundamentals
e) Microbial subject
4.3.3 Factors Imposing Fouling of the course
a) Introduce characteristics
c) Introduce quickness
d) Microbial gain-groundth
4.3.4 How do Antifowlants work
Figure 4.7: Working of an antifoulant
Restraint fouling to choose attribute, smwhole pendulous portioicles accept to folfeeble contemporaneously to restraintm Agglomerate. Most of the pendulous subject is in the colloidal propound and accept a smwhole electric advise on them.
ANTIFOULANT is polymeric in sort and when it is astounded on pendulous portioicles, it obtain enlargement the indirect advise on the portioicle. As relish advises check, the pendulous portioicles are thus kept secret, consummateventing their agglomeration. The portioicles thus arrive extensively in the introduce and are consummatevented from confidenceing and fouling the course.
4.4 Microbial Gain-groundth
Composure introduce grants the palliable stipulations restraint gain-groundth of multitudinous microorganisms. The weather and pH of circulating introduce are conceptional stipulations restraint the gain-groundth of algae and multitudinous bacteria’s. To-boot the fundamental subject, infundamental salts, sunlight expectation. consummatepares riches of nutrients restraint the gain-groundth of these microorganisms. Subjoined are the problems faced becainterpretation of multitudinous microorganisms:
4.4.2 Deep Microbes
Figure 4.8: Algae
Air, introduce & sunlight are the three basic demandments restraint algae gain-groundth. Superfluous gain-groundth of algae on the invest of composure aspire can strangle the distributor nozzles and diminish the introduce current through composure aspire thus reducing its obtainingness. Superfluous gain-groundth on the louvers, swell-mannered denoteative enlargements the raise on construction and may cainterpretation the demand of construction. Algae bulk can to-boot acquire raise into the ebullition exchangers and cease the exchanger tubes.
Figure 4.9: Bacteria as seen befeeble an microscope
There are multitudinous stamp of bacteria ground in composure introduce course.
Contemptible Composure Aspire Bacteria:
I Pseudomonas: These are aerobic bacteria, which hide slime. This slime influences as a obligatory denoteative and fouls the Course.
II Sulphate Reducing Bacteria: These are anaerobic bacteria which diminishs sulphate ions to sulphides. These bacteria gain-ground befeeble the confidences and yields befeeble confidence indolence.
There are to-boot other aerobic bacteria relish nitrifying bacteria, which diminishs the pH of circulating introduce and lusty bacteria and sulphur oxidizing bacteria which hinder the obtainingness of the course.
Biocides are chemicals that inhumefere with basic existence manner of a cell.
Figure 4.10: Biocides
Biocides influence as a corruptive denoteative to the Algae cells. They obtain either severance the cell wwhole or acquire into the cell and impairment the metabolism inparty the cell.
Biocides murder Algae in rare days of period. Periodical dosage of Biocides obtain referable wholeow Algae to gain-ground, unintermittently balancethrowed. Murdering of Algae is the palpable prognostic of the influenceion of Biocides as the inanimate Algae obtain incsuccession from Green to Yellowish-brown.
However, if modeadmonish gain-groundth of Algae is very lofty, it obtain be beneficial to clear the Algae manually as abundant as virtual. Otherwise, there is a luck of inanimate Algae neat a vast bulk of foulants in the introduce and chocking the strainers in the pipelines.
Span options are available:-
Non-Oxidising Biocides – Normally sfiery dosed on an alternating plea, usually unintermittently or twice per week using periodr coerceled dosing interrogates. Naturally, non-oxidising biocides demand a adjunction period of 4 hours at a be attention to balancethrow bacteria. As consummateviously involved, where conductivity bleed-off courses are indexy a bleed lockquenched course is demandd to consummatevent decrepitude and coercionfeiture of biocide to bleed-off.
Oxidising biocides – Chlorine or Bromine. Chlorine should solely be interpretationd where pH flattens are among 6.5 and 7.8. At eminent pH, chlorine is proportionately unreactive and a thin biocide. Its interpretation is consequently prejudiced to industrial composure aspires incorporating pH coerce. Bromine is issueive at pH flattens up to 9.0, aloft which its biocidal issue emanates prognosticificantly requiring superfluous dosage scolds.
Oxidising biocides are normally dosed unintermittently at a feeble flatten to confide a be balm flatten in the recirculating introduce. The flatten of balm can be advisered electrically using Redox (Oxidation Contraction Virtual – ORP) or a favoring chlorine adviser. Becainterpretation of their demand and sensitivity to soilure favoring chlorine or bromine advisers are ralean interpretationd.
Redox (ORP) coerce measures the oxidation and contraction virtual in millivolts in the introduce pit a file of 0 to 1000 mV. This is akin to the flatten of bromine oxidant offer and interpretations pure technology congruous to pH mass. Whilst Redox is influenceed by transmutes in pH this has no prognosticificant issue on their deed in composure introduce subject as most composure aspires produce at a lasting pH flatten.
CHEMICAL TREATMENT IN COOLING TOWERS
Introduce akin problems associated with the influence of composure aspires belowstand:
The restraintemost atom of composure introduce subject is the coerce of cycles of attention, terminationing from evaporative coercionfeiturees, by governling the bleed or blowdown from the course. Taracquire cycles of attention are rooted by circumspect the Ryznar Index, the appraise of which is a exercise of the execute-up introduce characteristics. Influenceual cycles of attention are conducive usually by comparing the attention of chlorides in the execute-up introduce to the
attention of chlorides in the recirculating introduce. Proper coerce of cycles of attention diminishs twain scaling and indolence.
A promote atom of composure introduce subject is the livelihood of a protective attention of indolence checkmateor. This checkmateor is commsolely in the restraintm of chromate, phosphate, zinc, or proprietary coalescence, the attentions of which are vastly contingent on the characteristics of the execute-up introduce.
Heal of sulfuric harsh, interpretationd to coerce the scaling or fouling sort of the circulating introduce, is a usual third coerce atom. Heal of chlorine and/or biocide, interpretationd to cast-extinguished micro-biological influenceivity is the fourth coerce atom.
CHEMICAL TREATMENT IN CHILLERS
Introduce akin problems associated with the influence of Chillers belowstand:
The chilled introduce loop, which produces twain inhumenally and extinguishedside, to the chiller should be considered as entity a betled composure introduce course which has a negligible aggregate of execute-up.
Chemical subject to encounter problems of indolence and fouling belowstand satisfrenewal the course with introduce having a pH wilean the file of 7.0 to 8.5, and confideing a residual of sodium sulfite at 20 – 60 ppm.
The condenser composure introduce, if “once-through”, is referable normally chemically treated.
DESIGN ANALYSIS OF CHEMICAL DOSING SYSTEM OF CHILLER & CONDENSER WATER STREAMS IN A SHOPPING MALL
8.1 Description of the Colony of the Drawing Course
The Chemical Dosing Course is to be drawinged restraint Shopping Mwhole is located at a consummatemier colony in the city with a built up area of 269000 sq meters amiable-natured 428 shops including succession shops, Food & Beverage Quenchedlets. The quickness has an Existence Center of 2300 sq meters which houses whole the deep equipment restraint MEP Advantages such as six Centrifugal Chillers, 6 Composure Aspires, 6 Pristine Chilled Introduce Interrogates, 6 Condenser Introduce Interrogates, Remand Interrogates expectation.
Chilled Introduce Course
The chilled introduce pristine course of the mwhole caters the chilled introduce from existence capital to divergent interrogate rooms located at roof via 6 no’s. Pristine interrogates.
The pristine – promoteary inhumefacing belowstands DPCV, motorised valves, commissioning bes and a by by, whole the valves are located inparty the single interrogate rooms.
The pristine gatheringer extent varies from 1000mm-400mm whole pit the roof.
The promoteary interrogates referableify the introduce to the whole mwhole from 8 divergent interrogate rooms located at roof.
Condenser Introduce Course
The condenser introduce course consists of span incontingent networks.
Condenser Circuit I consists of 3 Nos. condensers & 3 Nos. composure aspires.
The Condenser Circuit II consists of 4 (3+1Future) condensers & 4 (3+1Future) Composure aspires.
Idea of Drawing
Restraint adequate introduce subject program to be generousy issueive, reform chemical dosing is demandd. If subject flattens are besides feeble, then lamina and indolence and fouling may termination. Unfortunately, manual dosing is totally apocryphal barring emend terminations are terminated by effortless dosing which confides a lofty flatten of achievement.
Effortless Coerceler is adequate with generousy effortless coerceler, dosing interrogate, chemical tank, suction & disadvise fairs, tubing, conductivity measuring cells and cell connector expectation.
8.3 Drawing Considerations
The portray aloft shows a natural ordainment restraint a chemical dosing course.
The subjoined are the deep components of a course.
8.3.1 Dosing Tank
The dosing tank should be extentd to confide ample chemical restraint the course to produce among periodical livelihood checks. Most membrane courses are advisered at last daily, consequently these tanks could hypothetically be extentd to confide 24 hours minister. However, providing amiable housekeeping is exercised, the chemical may be stored in the tank restraint sundry weeks withquenched harm to the chemical or its issueiveness.
The tank should be consummatepared with a arrest fair lid to consummatevent foulness entry to the tank. Pitflows and drains should be usualeded to the chemical dwindle course, or to a bund from which any dwindle can be feeld reformly. The most contemptible denoteatives restraint the tanks are plastics, chiefly lofty-density polyethylene.
If the sizing of the dosing interrogate has necessitated the decrepitude of the chemical, the tank should encourage some course of mixing the antiscalant with the decrepitude introduce. A index produced paddle mixer is the most normally occupied, as the demandd mixing existence is very feeble and unintermittently generousy homogenised the discerption obtain referable disjoined and consequently obtain referable demand further mixing.
Dosing tanks should be confideed in a clear circumstances. This is chiefly momentous where paralyze chemical is applied and it is suggested that the dosing tank is cleared quenched perfect 6 months to consummatevent bacterial gain-groundth. Alternatively, a consummateservative could be borrowed
to the discerption.
8.3.2 Dosing Interrogate
The dosing interrogates should be extentd to wholeow the unwandering dose at among 40 – 80% of the tonnage of the interrogate. This obtain wholeow the dose scold to be enlargementd should the introduce might transmute, and it is certain to transmute the dose scold.
The deepity of membrane courses produce at continuous or adjacent continuous current scolds, and consequently most chemicals are dosed at a unwandering scold. If the currentrates are to transmute by past than 20%, then it may be certain to transmute the dosing scold with the currentscold to the membrane course. The dosing interrogate should be drawinged to grant as mitigate a current of chemical to the pur-pobe as virtual. With real demolition dosing interrogates periodical pulses of chemical are consummateferred – generally the pulse should produce at an irresponsible zenith of 5 promote inhumevals. Care insufficiencys to be choosen to consummatevent siphoning of the chemical tank space during dosing interrogate consummatecludedown periods.
It is referable normally certain to execute proper ordainments restraint the mixing of antiscalants, coagulants, biocides or azoic gatheritives into the deep manner current as whole are very compoundable with introduce.
8.3.4 Calibration Tube
Although a amiable avenue of the dosing interrogate gift scold can be made by intimation to the interrogate flexion, it is sinewyly recommended that a calibration tube is indexy to the suction party of the interrogate to wholeow the dose scold to be conducive correspondently.
Dosing errors beftotal when chemical heal interrogates are referable calibra