Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
TECHNICAL DESCRIPTION of BIG evolution CHILLERS
screw series
Technical Description
screw series 1
General description
EET/EEF (Ecology Efficiency Technology) and EHET/EHEF (Ecology High Efficiency Technology – Class A)
are chillers of BIG evolution series operating with refrigerant fluid R-134-A. These chillers are PED
certificated TUV Italy number 0948, with air condensation and axial fans complete “Free-cooling” section
(only for models EEF and EHEF) to guarantee a high energy saving. The nominal cooling capacities are
210÷1500 kW in standard condition. They are designed for use both in the process and comfort sectors.
The chillers are equipped with all the components that ensure automatic cooling of water or a
water/glycol solution.
To guarantee maximum operating safety the units have two completely independent refrigeration
circuits and they are supplied with a full oil and refrigerant load after having been factory tested with
water.
Construction and Panel
(Structure)
The Chillers are designed for outdoor
installations, having maximum corrosion
protection, with all parts being of heavy
gauge , galvanised steel construction,
polyester powder painted in RAL 7035 (all
other RAL upon request). The base is of 3
mm gauge galvanised steel channels,
polyester-powder painted RAL 7035,
interconnected using special rivets with
elevated mechanical characteristics.
The inner hidden frame parts are
constructed of galvanised steel.
Holes (ø 56 mm) are seated in the base,
where the bars can be fitted for lifting the
unit.
Technical Description
screw series2
Panels (where fitted) are made of suitable
gauge galvanised steel, polyester-powder
painted in RAL 7035 and provided with
water-proof gasket.
All parts of frame and cabinet are built by
Hitema itself . The steel frame is strongly
stiffened and a particular care is taken to
the weights distribution, in order to avoid
excessive distortions during the handling
and transport of chiller, which could
damage the refrigerant circuit and the coils
of condenser/ water battery.
All bolted connections are done with
double lock washer.
Screw Compressors
These chillers are equipped with Bitzer Screw
Compressors. The Screw compressors are with
cast iron casing and rotors manufactured from
forged steel and suitable for operating at the
speed of 2980 rpm. The lubricating system
includes an oil reservoir with sufficient capacity to
provide oil at all times of the compressor
operation. Compressors are protected with a low
refrigerant pressure cut out, a high refrigerant
pressure cut out switch, a differential oil pressure
switch, a chilled water low temperature switch. It
is possible to manage the compressors, through
HITEMA Software, under unfavourable
conditions that otherwise could bring
mechanical and electrical damages to the
compressor motor.
Technical Description
screw series3
Shell and Tube Evaporator
Shell and tube is built for maximum exchange of heat
between the refrigerant and the fluid to chill. The outer
shell is completely insulated with a closed cell anti-
condensate sheet. Also legs and supports are insulated in
order to avoid corrosion due to air vapour condensate.
Chillers is designed for heat exchange fouling factors for
water (glycol 20% as 0.000086 m²K/kW) in order to get a
water velocity until 1.5 m/s.
It is available version with anti-freezing electrical
resistance (as optional).
Air Refrigerant Exchanger
Technical Description
screw series4
Condensing battery
The air chilled condenser is a copper tubeand aluminium finned coil. The specialcircuit on the coolant side is made to obtainmore circuits and permits sub-cooling of thecoolant by about 5 K. The containmentstructure is in aluminium as protectionagainst the elements. The upper bendedplate support and frame of coils is HITEMAspecial design. The coils are supported inorder to discharge the weight on the mainframe beams and to avoid an excessivedistortion of coils during the transportation,handling and operating.
The air flow is canalized by steel panels inorder to achieve the best operatingconditions of fans; the panels are providedwith handles in order to have a easy wayfor removing during the maintenancephases.
Low Noise and Super Low Noise Version (as optional)
Low noise version and Super Low Noiseversion allow a more noise reduction thankto fans installation with low number ofrevolutions (EC Fans) and a special bladesconfiguration, but guaranteeing a highefficiency due to larger size of heatexchangers. The cabinet is very strong andbuilt using proper mechanical shrewdnessin order to get the damping of inducedvibrations from refrigerant and hydrauliccircuit. Compressors are covered with aisolating material internal covered box.
Technical Description
screw series5
Finned pack type in aluminium with expanded copper pipes. Free cooling battery is installed in series at
the condenser (on air side) and in series with the evaporator (on water side). It allows the use
contemporary of mechanical refrigeration and free cooling mode. The particular installation of the coil
permits easy cleaning of the finned pack.
Free Cooling and condenser coils are easily accessible to allow
easy inspection and cleaning of the same, in this way they are
always guaranteed the best conditions of operation.
All battery headers are provided with hose holder and
special designed clamps in order to avoid loosening of
rubber hoses, these type of connection ensure more
operating reliability and easier maintenance.
Integrated Free Cooling (designed for EEF/EHEF series)
Technical Description
Screw series6
Free Cooling Logic
Axial Fans
Axial fans EBM-Papst, conforming to CE.
External rotor type motor designed for
phase control and protected against
overloads and overheating thanks to a
built-in thermal overload cut-out.
Accident prevention grill. Blades with
protective paintwork, coupled directly to
the motor.
EC axial fans (as option)
To reduce electrical consumptions and the noise type EC axial fans are used (brushless motorsand with inverter regulation). With EC motors the switch is by a control circuit that manages theclosure and the opening of transient states of power. In EC motors brushes are replaced withelectronic components, the advantages of this technology is high efficiency, low motortemperatures, short motor dimensions, independence of number of revolutions from frequencyand voltage, ease of cabling compared to VFD AC motors.
Refrigeration circuit
The refrigeration circuit is made in copper pipes and includes the following components for all models:
• Electronic Expansion valve with external equalisation (Sporlan Type);
• Cut-off cocks on the compressor supply and on the return line (not for all models);
• Shut-off valve on liquid line;• Interchangeable filter-drier;• Solenoid valve;• Liquid and humidity indicator;• Crankcase oil heater;• High pressure switch automatic reset
and manual reset;
• Low pressure switch; • Level oil indicator;• Safety valve (high pressure line);• Suction and discharge shut off valve;• Pressure transducers;• Safety valve for evaporator;• Thermostatic valve for injection line;• Solenoid valve for injection;• Liquid receiver;• High and low pressure gauges.
Technical Description
screw series7
Economizer (Plate Type)
EET/EEF/EHET/EHEF are equipped with economizer.
Economizer is a device designed to improve both cooling
capacity and efficiency of the system, by providing an
additional sub-cooling, achieved with the addition of an
intermediate plate heat exchanger, expansion valve and the
cross flow refrigerant circuits.
Oil separator
(for low temperatures)
To avoid that at low loads oil could becaught and not lost in the refrigerant circuitan oil separator is positioned at the outletof compressor.
Technical Description
screw series8
Water circuit
The hydraulic circuit in carbon steel is completelyinsulated with a new insulating material made up of16 mm “closed cell” insulation and 3 mm of “opencell” insulation onto a special Anti-UV material isglued. Pumps can be Inverter Driven (as optional).
It consists of:
• double pump directly managed by pCO• manifolds and connection pipes of high thickness;• evaporator with water discharge valve;• flow switch;• pressure indicator with gauges;• valve between water circuit and gauges;• water safety valve;• nipple vents;• evaporator inlet temp. sensor;• evaporator outlet temp. sensor;• free cooling sensor;• safety valve low/high pressure;• predisposition for further sensor at Customer use
All hydraulic circuit including free cooling, evaporator, connections, etc. are tested under 10 barg
pressure for at least 48 hours.
Electric panel
The electrical panel is enclosed inside the
unit and, consequently, protected to a
rating of IP54. It is easily accessible by
opening two doors. The main switch with
door interlock complies with the EIC
standard. Wiring complies with the IEC. The
electrical panel includes fuses and thermic
protection for the compressors and
magneto-thermic for the fans, motor
protection to IEC 947, terminals for all
external connections and transformer for
auxiliary circuit.
EET/EEF/EHET/EHEF screw compressors are part
winding or star-delta starting, with phases sequence
protection and volt-metric relay. The auxiliary electric
part is protected by fuses and the electrical panel has
air vents to ensure an adequate air cooling
Technical Description
screw series9
The water chiller with air condensation operating in thefree-cooling mode are controlled by a microprocessor. Theelectronic chiller control is performed by a control systemCarel on which Hitema software 3.5 is loaded.Programming and input the nominal values (operatingdata) are done directly on the display that also shows anymalfunctions giving a description of it.There is also a visualalarm (and acoustic). The parameters set are maintainedalso in the event of a power cut.
Environmental compatibility
High energy efficiency that provides a substantial reduction in energy consumption, has led to decrease inthe equipment CO2 foot print. The use of ecological refrigerants further help to raise the environmentalcredentials of the products range.
Quality guarantee
Hitema’s guarantee of quality and reliability is underpinned by the use of the very latest technologysupported by constant research and products that are manufactured in accordance with very stringentstandards.
Technical Description
screw series10
Technical Description
screw series11
Technical Description
screw series12
Peso-Weight Kg Materiali-Materials
Propieta' riservata-Riproduzione vietata a termine di legge-Copyrigt-Nachdruk verboten-Propriete reservee
Denominazione-Denomination
Particolare-Detail
1/4
SCHEMA FRIGORIF./IDRAULICO HYDRAULIC/REFRIGERATING DIAGRAM
COOLING BIG EVOLUTION DIS.-DRAW N.
PROGRAM. N.
REVISIONE
SFI-CBE-200ST01
00
Dis.to-DrawnScala-Scale Data-Date Ver.-VersionM.BURBA26/04/2013 R
CIRCUITO FRIGORIFERO ALTAPRESSIONE / HIGH PRESSUREREFRIGERANT CIRCUITCIRCUITO FRIGORIFERO BASSAPRESSIONE / LOW PRESSUREREFRIGERANT CIRCUITCIRCUITO IDRAULICO ACQUA CALDA /HYDRAULIC CIRCUIT WARM WATER
CIRCUITO IDRAULICO ACQUA FREDDA /HYDRAULIC CIRCUIT COLD WATER
LEGENDA /LEGEND
FLT1
SCA
HPM1
MC1
RM1
RL1 RLQ1
SCE1
SCE1
RC1
PDO
PRT1FLTA1
SFA1
SFC1
VSC1
PRT1
FLTA1
SFA1
VSC1
SFC1
OPTIONAL
OPTIONAL
INVERTER
RCA1
OPTIONAL
VEE1
ECO1
SVE1
RG2V
RA2V
RBP1
RAP1
OPTIONAL
RAE
TRSAP1
MV1
MV1
FLTI1
SCR1
SCR1
SCR1
TRSBP1
SVI1
SV1LIQ1
EVTS1
VRA1
RG2V
RA2V
VFC
TA
VSC
SCR1
EC
VSE1
VSA1
TM
RA1
MBP1
LP1
BSC1 OPTIONAL
MAP1
VRA1
TRSBP1
RE1
RI1
TFCFL
VFC
OPTIONAL
OPTIONAL
SFA
VSW
VSW
VSW
CIRCUITO IDRAULICO ACQUA CALDA /HYDRAULIC CIRCUIT WARM WATER
CIRCUITO IDRAULICO ACQUA FREDDA /HYDRAULIC CIRCUIT COLD WATER
LEGENDA /LEGEND
MW
VRAP
VRAP
VSA
VSA
VSCS
VSWSSFAS
SER
MP
VRAP
MP
VRAPMW
RAS
LLA
OPTIONALFLTY
BSP
BSP
MPR
MP
MP
MPR
OPTIONALFLTY
CON SERBATOIO - CON POMPA /WITH TANK - WITH PUMP
SENZA SERBATOIO - CON POMPA /WITHOUT TANK - WITH PUMP
VRAP
VSA
VSA
Peso-Weight Kg Materiali-Materials
Propieta' riservata-Riproduzione vietata a termine di legge-Copyrigt-Nachdruk verboten-Propriete reservee
Denominazione-Denomination
Particolare-Detail
2/4
SCHEMA FRIGORIF./IDRAULICO HYDRAULIC/REFRIGERATING DIAGRAM
COOLING BIG EVOLUTION DIS.-DRAW N.
PROGRAM. N.
REVISIONE
SFI-CBE-200ST01
00
Dis.to-DrawnScala-Scale Data-Date Ver.-VersionM.BURBA26/04/2013 R
VSRA
VSRA
VRAP
BSPOPTIONAL
OPTIONAL
AIR-WATER EXCHANGERSCAMBIATORE ARIA-ACQUASFC1-2
MW
VSW
FL
MP
TA
EC
SIGLA
MANOMETRO ACQUA
VALVOLA SICUREZZA ACQUA
WATER PRESSURE INDICATOR
SAFETY WATER VALVE
FLUSSOSTATO
ELETTROPOMPA DI PROCESSO 1 o 2
FLOW SWITCH
1 or 2 PROCESS PUMP
TEMPERATURA ACQUA USCITA EVAPORATORE (ANTIGELO)
TEMPERATURA ACQUA INGRESSO EVAPORATORE
DESCRIZIONE
EVAPORATOR OUTLET WATER TEMPERATURE (ANTIFREEZING)
EVAPORATOR INLET WATER TEMPERATURE
DESCRIPTION
VRA1-2 VALVOLE DI NON RITORNO ACQUA ONE WAY VALVE
VSA VALVOLA A SFERA SHUT OFF VALVE
VFC VALVOLA A DUE VIE 2-WAYS VALVE
RAS RESISTENZA ANTIGELO SERBATOIO TANK ANTIFREEZE HEATER
CIRCUITO IDRICO / HYDRAULIC CIRCUIT
VSCS VALVOLA DI SCARICO ACQUA SERBATOIO DISCHARGE VALVE FOR TANK
SFAS VALVOLA SFIATO ARIA MANUALE SERBATOIO AIR PURGE MANUAL VALVE FOR TANK
TFC TEMPERATURA ACQUA FREE COOLING FREE COOLING WATER TEMPERATURE
SER SERBATOIO ACQUA WATER TANK
std
optional
optional
optional
LLA LIVELLOSTATO ACQUA WATER LEVEL SWITCH
FLTY FILTRO ACQUA A Y WATER Y FILTER
RAE RESISTENZA ANTIGELO EVAPORATORE EVAPORATOR ANTIFREEZING HEATER optional
RA2V RESISTENZA ANTIGELO VALVOLA A 2 VIE 2 WAY VALVE ANTIFREEZING HEATER optional
RG2V ROTAZIONE GIORNALIERA VALVOLA A 2 VIE 2 WAY VALVE DAILY ROTATION optional
optional
BSP BOX INSONORIZZAZIONE POMPE NOISE INSULATION PUMP BOX optional
Peso-Weight Kg Materiali-Materials
Propieta' riservata-Riproduzione vietata a termine di legge-Copyrigt-Nachdruk verboten-Propriete reservee
Denominazione-Denomination
Particolare-Detail
3/4
SCHEMA FRIGORIF./IDRAULICO HYDRAULIC/REFRIGERATING DIAGRAM
COOLING BIG EVOLUTION DIS.-DRAW N.
PROGRAM. N.
REVISIONE
SFI-CBE-200ST01
00
Dis.to-DrawnScala-Scale Data-Date Ver.-VersionM.BURBA26/04/2013 R
MPR ELETTROPOMPA DI RICIRCOLO 1 o 2 1 or 2 RECYCLING PUMP optional
std
std
std
std
optional
std
std
std
std
optional
VRAP VALVOLE DI NON RITORNO ELETTROPOMPA PUMP ONE WAY VALVE
VSWS VALVOLA SICUREZZA ACQUA SERBATOIO SAFETY WATER VALVE FOR TANK
VSC VALVOLA DI SCARICO ACQUA DISCHARGE VALVE
SFA1-2 VALVOLA SFIATO ARIA MANUALE AIR PURGE MANUAL VALVE std
std
optional
optional
optional
optional
VSRA VALVOLA A SARACINESCA SHUT OFF VALVE optional
Peso-Weight Kg Materiali-Materials
Propieta' riservata-Riproduzione vietata a termine di legge-Copyrigt-Nachdruk verboten-Propriete reservee
Denominazione-Denomination
Particolare-Detail
4/4
SCHEMA FRIGORIF./IDRAULICO HYDRAULIC/REFRIGERATING DIAGRAM
COOLING BIG EVOLUTION DIS.-DRAW N.
PROGRAM. N.
REVISIONE
SFI-CBE-200ST01
00
Dis.to-DrawnScala-Scale Data-Date Ver.-VersionM.BURBA26/04/2013 R
VALVOLA SOLENOIDE INIEZIONE LIQUIDOSVI1-2 SOLENOID VALVE FOR INJECTION LINE
SENSORE LIVELLO OLIOPDO1-2 OIL LEVEL SENSOR
TRASDUTTORE ALTA PRESSIONETRSAP1-2 HIGH PRESSURE TRASDUCER
RA1-2 RUBINETTO DI ASPIRAZIONE SUCTION SHUT OFF VALVE
LIQ1-2
RL1-2
RM1-2
RLQ1-2
FLTI1-2
MBP1-2
MAP1-2
VSE1-2
VSA1-2
SCR1-2
SV1-2
LP1-2
HPM1-2
RC1-2
SCA
MV1-2
SCE1-2
MC1-2
SIGLA
SPIA DI FLUSSO / INDICATORE DI LIQUIDO
FILTRO DISIDRATATORE INIEZIONE LIQUIDO
MANOMETRO BASSA PRESSIONE
RUBINETTO DI MANDATA
RUBINETTO LINEA DEL LIQUIDO
RICEVITORE DI LIQUIDO
VALVOLA SICUREZZA (LINEA ALTA PRESSIONE)
MANOMETRO ALTA PRESSONE
VALVOLA SICUREZZA PER EVAPORATORE A FASCIO TUBIERO
LOW PRESSURE INDICATOR
HUMIDITY INDICATOR / SIGHT GLASS FOR LIQUID LINE
DISCHARGE SHUT OFF VALVE
LIQUID VALVE
LIQUID RECEIVER
FILTER DRYERS FOR INJECTION LINE
SAFETY VALVE (HIGH PRESSURE LINE)
HIGH PRESSURE INDICATOR
SAFETY VALVE FOR SHELL AND TUBE EVAPORATOR
PRESSOSTATO ALTA PRESSIONE RESET MANUALE
PRESSOSTATO BASSA PRESSIONE
VALVOLA SOLENOIDE LIQUIDO
VALVOLA DI CARICO SCHRADER
SCAMBIATORE DI CALORE AD ARIA (CONDENSATORE)
SCAMBIATORE DI CALORE AD ACQUA (EVAPORATORE)
RESISTENZA CARTER COMPRESSORE
MOTOVENTILATORI ASSIALI
COMPRESSORE
HIGH PRESSURE SWITCH MANUAL RESET
LOW PRESSURE SWITCH
SOLENOID-VALVE FOR LIQUID LINE
FILL-UP VALVE
AIR HEAT EXCHANGER (CONDENSER)
COMPRESSORS
COMPRESSOR CRANKCASE HEATER
WATER EXCHANGER (EVAPORATOR)
AXIAL FAN MOTORS
DESCRIZIONE DESCRIPTION
CIRCUITO FRIGORIFERO STANDARD / STANDARD REFRIGERATION CIRCUIT
std
std
std
std
std
std
std
std
std
std
std
std
std
std
std
std
std
std
optionalPARTIAL OR TOTAL HEAT RECOVERRECUPERATORE DI CALORE PARZIALE O TOTALERCA1-2
PRT1-2
FLTA1-2
GRIGLIA PROTEZIONE CONDENSATORE
FILTRO ARIA CONDENSATORE
CONDENSER GRID PROTECTION
AIR CONDENSER FILTER optional
BSC1-2 BOX INSONORIZZAZIONE COMPRESSORE NOISE INSULATING COMPRESSOR BOX optional
EVTS1-2 VALVOLA TERMOSTATICA ELETTRONICA ELECTRONIC THERMOSTATIC VALVE 1
stdEXPANTION VALVE FOR ECONOMIZER
SOLENOIDE VALVE FOR ECONOMIZER
ECONOMIZER / OPTIONAL FOR 407C VERSION
VALVOLA DI ESPANSIONE ECONOMIZZATORE
VALVOLA SOLENOIDE ECONOMIZZATORE
ECONOMIZZATORE / OPZIONALE PER VERSIONE IN 407C
VEE1-2
SVE1-2
ECO1-2 std
stdDISCHARGE COMPRESSOR TEMPERATURETEMPERATURA MANDATA COMPRESSORETM1-2
std
std
std
TRASDUTTORE BASSA PRESSIONETRSBP1-2 LOW PRESSURE TRASDUCER
std
std
std
FLT1-2 FILTRO DISIDRATATORE FILTER DRYERS std
std
RI1-2 RUBINETTO INIEZIONE LIQUIDO VALVE FOR INJECTION LINE std
RE1-2 RUBINETTO ECONOMIZZATORE VALVE FOR ECONOMIZER std
RAP1-2 RUBINETTO ALTA PRESSIONE HIGH PRESSURE VALVE std
RBP1-2 RUBINETTO BASSA PRESSIONE LOW PRESSURE VALVE std
std