Climate Wizard CW-H10 Guida utente

This Guide is subject to change without notice. REVISED AND PUBLISHED - 13 OCTOBER 2009 1

APPLICATION GUIDE

Models CW-H10, CW-H15

Indirect Evaporative Air Conditioner

GENERAL

Climate Wizard is an “Indirect Evaporative Air Cooler” that is capable of delivering cooled air, with no

added moisture at temperatures that are very similar to those produced by refrigerated air

conditioners. The Climate Wizard comprises of one (1) backward curved, high pressure,

centrifugal fan directly connected to an electronically commutated motor (ECM), a multi-patented

heat exchanger core, a water reservoir and water distribution system including circulating centrifugal

pump(s), automatic chlorination device and an auto water management feature.

Climate Wizard cannot remove moisture, but it does not add any moisture.

Climate Wizard is manufactured in two configurations - HORIZONTAL and VERTICAL. This

Application Guide refers to the HORIZONTAL configuration only.

The heat exchanger core may comprise of 2 or 3 sections.

The 2-section model is the CW-H10, with nominal cooling capacity of 10 KW*

The 3-section model is the CW-H15, with nominal cooling capacity of 15 KW*.

* [Cooling capacity is calculated at inlet conditions of 380C dry-bulb and 100C dewpoint temperatures, in accordance with Australian Standard AS2913-

2000. For other conditions refer tables on page 5. This capacity applies only when the Climate Wizard is being used in Stand Alone Cooling

applications. For Cold Front Cooling higher capacities apply - refer table on page 9.]

Not all the inlet air is delivered into the building. Inside the Climate Wizard the air is divided into

two streams..One stream is supercooled and delivered into the building, and the second stream is

used to intensify the wet-bulb depression, is supersaturated and discharged to atmosphere along

with all the heat that has been removed from the dry fresh air stream.

External Static pressure affects the behaviour of the two air streams inside the machine. A means

of compensating for the external static pressure will be provided on the Climate Wizard depending

on the application - see later information in this Guide.

INLET

(AMBIENT)

AIR

EXHAUST

AIR (WARM

& MOIST)

SUPPLY

AIR (COOL

& DRY)

This Guide is subject to change without notice. REVISED AND PUBLISHED - 13 OCTOBER 2009 2

APPLICATION GUIDE

Models CW-H10, CW-H15

Indirect Evaporative Air Conditioner

GENERAL ….cont’d

Being a water based machine Climate Wizard incorporates features that recognise the necessity of

managing water quality and of complying with Codes that address regulations for health protection.

Inside the cooler there is an electrolytic Chlorinator that generates free Chlorine in the water

reservoir and behaves as a permanent biocide to annul any bacterial activity in the water. It is fail-

safe because if it ceases to function, the Climate Wizard will also shut down.

A water management system measures the salinity of the water and drains a percentage of the

water from the reservoir while admitting fresh water to dilute the salt concentration in the reservoir.

A 3-probe detector is located in the reservoir. This feature can be field set to either measure the

salinity via the probes, or to drain water out and admit fresh water after the level has reached the top

probe eight (8) times. [This is a measure of how much water has been evaporated in the machine.]

In Salinity measuring mode it maximises water usage before purging, thereby eliminating water

wastage.

SERVICES - water & electricity & drain

Climate Wizard requires a permanent water supply to be connected. 1/2 inch BSP male connection

point provided on the cooler (see diagram). Pressure range required - 100 kPa - 800kPa at flow

rate of 20 L/min.

Climate Wizard requires 3-phase electrical power to be supplied. Minimum 10 amp, 4-wire+

ground conductors supplied from independent circuit breaker. If required, main isolation switch to

be furnished by contractor adjacent to the cooler. Main power terminals provided inside electrical

cabinet with glands provided for cable entry.

A built-in Drain Valve is controlled by the water management system. The valve has 40mm BSP

male connection and is provided with a reducing fitting for connection if desired to a flexible hose for

running water to waste. See diagram for location. Recommended minimum drain hose internal

diameter 20mm.

TOP VIEW

121

120

DRAIN IN

FLOOR OF TANK

806

ACCESS COVER FOR

DRAIN CONNECTION

WATER CONNECTION

‐1/2” BSP NIPPLE

806

AIR

INLET

END VIEW

This Guide is subject to change without notice. REVISED AND PUBLISHED - 13 OCTOBER 2009 3

APPLICATION GUIDE

Models CW-H10, CW-H15

Indirect Evaporative Air Conditioner

Climate Wizard is designed to be used in 3 different types of applications:

1. STAND ALONE COOLING - in cases where the Climate Wizard is the primary source of Air

Conditioning for the building.

2. SUPPLEMENTARY COOLING - in cases where the Climate Wizard is used to augment the

capacity of the existing air conditioning system, or to extend its reach into the building, or to

greatly reduce the energy consumption of the Air Conditioning plant.

3. COLD FRONT COOLING - in cases where the Climate Wizard is used to pre-cool the fresh air

supply to new or existing refrigerated air conditioning plants in order to prolong the life of the

plants, to save significant energy, and to greatly reduce demand on existing infrastructure

which becomes over-stressed in heat-wave conditions.

In each application type, remarkable energy savings can be achieved compared with conventional

Refrigerated Air Conditioning. THE HOTTER THE CLIMATE THE MORE SAVINGS WILL BE

MADE.

See following pages for details of each application type.

CW CW

STAND ALONE COOLING

CW CW

COLD FRONT COOLING

AC AC

SUPPLEMENTARY COOLING

This Guide is subject to change without notice. REVISED AND PUBLISHED - 13 OCTOBER 2009 4

APPLICATION GUIDE

Models CW-H10, CW-H15

Indirect Evaporative Air Conditioner

STAND ALONE COOLING:

Climate Wizard can be used to supply the entire air conditioning demand of a building.

The Climate Wizard is intended to be installed external to any building, but may also be installed

indoors, for example in an air conditioning plant room provided that fresh outside air can be supplied

to the cooler and that the exhaust air is discharged directly to the exterior of the building.

The supply air temperature delivered by the Climate Wizard, and its airflow, is similar to the tempera-

ture and airflow of a refrigerated Air Conditioner. Therefore the air distribution design should follow

similar parameters of design and installation. Essentially that means similar duct sizes, similar

outlet design and attention given to the avoidance of cold air drafts. The use of Zones is acceptable

provided that used air can exit the building satisfactorily.

IT IS ESSENTIAL THAT THE PLANT BE SO ARRANGED THAT THE CLIMATE WIZARD EX-

HAUST AIR CANNOT BE RECIRCULATED INTO THE AIR INLET OF THE COOLER.

Sizing:

It should be understood that the Climate Wizard performance is similar to a refrigerated Air Condi-

tioner in regard to the supply air temperature and the ‘no added moisture’ feature. Since refriger-

ated Air Conditioners are sized on the basis of a heatload calculation, Climate Wizard must be

treated in the same way. Contractors should therefore continue to use their regular method for de-

termining the heatload of a building and apply the Climate Wizard to that heatload. The ‘Air Change

Rate’ method that is often used for Direct Evaporative Air Coolers is NOT to be used.

However, the rated capacity of the Climate Wizard will vary according to the local climate conditions,

and the indoor temperature setting. Thus a second calculation must be made before the final siz-

ing of the cooler can be made.

For the CW-H10: Cooling capacity = K1 x T watts [K1 = specific heat x density x airflow = 1.23 x 800 L/sec = 984)

T = (Tset room - Tsupply)] [Tsupply is found in table 1.]

For the CW-H15: Cooling capacity = K2 x T watts [K2 = specific heat x density x airflow = 1.23 x 1100 L/sec = 1353)

T = (Tset room - Tsupply)] [Tsupply is found in table 1.]

Table 1. SHOWS SUPPLY AIR TEMPERATURE FOR

GIVEN INLET DRY-BULB AND DEWPOINT

TEMPERATURES

Inlet dry-bulb temperature - deg C

26 32 38 44 50

0 9.4 10.7 12.2 13.6 15.0

5 11.1 12.2 13.5 14.8 16.0

10 13.4 14.2 15.4 16.3 17.3

15 16.4 17.0 17.6 18.4 19.0

20 20.5 20.6 20.8 21.0 21.2

Inlet Tdew

deg C

FOR CONTROL SCHEMES

SEE SECTION HEADED

“CONTROL SCHEMES”

This Guide is subject to change without notice. REVISED AND PUBLISHED - 13 OCTOBER 2009 5

APPLICATION GUIDE

Models CW-H10, CW-H15

Indirect Evaporative Air Conditioner

STAND ALONE COOLING:

Tables of Nominal Cooling Effect for Climate Wizard in various locations and various jurisdictions.

Tdb Twb Tdew Trm Ts CW‐H10 CW‐H15

deg C deg C deg C deg C deg C KW KW

Beijing 34.5 20.9 13.9 27 17 10 14

Birm'ghm 27 18.3 13.3 24 15 9 12

Cairo 37.6 22 14.3 27 17.5 9 13

Chicago 32.4 22.5 18.126.7 19 8 10

Dubai 42.8 23.8 14.5 27 17 10 14

Jo'berg 28.9 17.9 11.3 24 15 9 12

Madrid 35.9 18.7 7.5 27 14 13 18

Milan 33.9 22.8 17.9 24 19.5 4 6

Paris 32.3 20.6 14.6 24 16 8 11

Phoenix 43.4 20.4 5.5 26.7 15 12 16

NOMINAL COOLING EFFECT FOR NAMED CITIES ‐KW

Tdb Twb Tdew Trm Ts CW‐H10 CW‐H15

deg C deg C deg C deg C deg C KW KW

AS2913 38 2111.8 27.4 17 10 14

Eurovent 35 19 9.127 15 12 16

UK (Cosaf) 30 16 5.6 22 17.5 4 6

CEC (USA) 32.8 20.5 14.126.7 19 8 10

ARI (USA) 35 23.9 19.3 26.7 17 10 13

NOMINAL COOLING EFFECT FOR NAMED STANDARDS/NORMS ‐KW

Tdb ambient dry‐bulb temperature

Twb ambient wet‐bulb temperature

Tdew ambient dewpoint temperature

Trm selected room temperature

Ts supply air temperature from Climate Wizard

This Guide is subject to change without notice. REVISED AND PUBLISHED - 13 OCTOBER 2009 6

APPLICATION GUIDE

Models CW-H10, CW-H15

Indirect Evaporative Air Conditioner

SUPPLEMENTARY COOLING:

Climate Wizard can be used to boost or supplement the existing air conditioning capacity of a build-

ing. In this application the Climate Wizard will be installed in a similar way to the Stand Alone ap-

plication, but will be sized to provide added cooling capacity to the building. It can also be used to

supply all the fresh air requirement of a building and in this case it will be sized according to the

fresh air quantity requirement.