Turnuri de racire adiabatice MITA PAD

Limba: Engleza

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Tip documentatie: Fisa tehnica

Pagina 1 - Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza PAD

Adiabatic cooler

PAD...

PAD Adiabatic cooler PAD series MITA Adiabatic cooler PAD series General information “Adiabatic cooling” is a thermodynamic phenomenon by which air temperature is decreased through humidiﬁcation. The temperature than can be reached is called “adiabatic saturation temperature” and, depending on the humidiﬁcation system’s efﬁciency, and it can be much lower than the “dry” air temperature. MITA adiabatic cooler exploits this principle to improve the ﬁnned coil’s efﬁciency, and can be used to cool water/glycol mixtures or to condensate refrigerants. Structural and operating characteristics Finned coil Front view, with manhole Motor-fan group MITA adiabatic cooler has been designed to reduce water consumption, minimize power consumption and totally prevent aerosol emissions into the atmosphere. The high saturation efﬁciency ensured by the special humidiﬁer pack enables the use of a single ﬁnned coil provided with many rows, so as to obtain the same p

Pagina 1-Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza PAD

Adiabatic cooler

PAD
series

MITA ...

Pagina 2 - Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza erformance as traditional...

erformance as traditional systems with a double 2-rows coil. In MITA adiabatic cooler air humidiﬁcation is obtained by short humidiﬁer pack wetting cycles, at intervals of several minutes, in comparison with traditional systems in which the humidiﬁer pack must be continuously wetted, or water must be constantly sprayed in the air ﬂow. In MITA solution the water required to humidify the air ﬂow is released constantly over time from the pack until the next wetting cycle (in average conditions, 4 to 6 wetting cycles/hour, lasting only a few seconds, are sufﬁcient). Structural characteristics: • main components (small basin, body and upper part) made of ﬁbreglass, which is light, corrosion-proof and maintenance-free. The other elements are made of plastic material (water distribution system and air inlet louvers) or of hot-dip galvanized steel (bearing frame) • ﬂocked PVC humidiﬁer pack with high water retaining capacity. Its conﬁguration, with large channels, allow

Pagina 2-Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza erformance as traditional systems with a ...

Pagina 3 - Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza s the installation of several ...

s the installation of several layers without excessive pressure drops, which permits a considerable efﬁciency increase • “in-line” arrangement of the different components: the pack is uniformly crossed by the air, allowing homogeneous air saturation; the ﬁnned coil, installed in the same section, considerably improves its efﬁciency. Fans are in line with other components, and therefore the air ﬂow does not change direction, for a better energy saving. In the cold season, the air can be sucked directly by suitable (optional) side dampers, for a further reduction in power consumption • reduced water consumption, thanks to a better system efﬁciency. During each wetting cycle, excess water falls into collecting basin, and it is re-used in the subsequent cycle. The basin is only a reserve from which – when necessary – the pump can pick-up the water required to keep the humidiﬁer pack wet. The control system ensures constant water change and daily draining of the basi

Pagina 3-Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza s the installation of several layers...

Pagina 4 - Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza n
• the control system has...

n • the control system has been designed to meet both maximum efﬁciency/energy saving and low environmental impact requirements. The following parameters are controlled and handled: - Flocked PVC humidiﬁer pack outside air temperature beyond the ﬁnned coil inlet / outlet ﬂuid temperature rotation speed of the fans (frequency inverter-controlled) automatic shift from “dry” to adiabatic function and vice-versa wetting intervals of the humidiﬁer pack and simultaneous fans stop opening/closing of air by-pass dampers (if provided) PAD series Structural characteristics 1 9 2 8 3 10 4 11 7 6 5 1 Axial fan 5 Centrifugal water pump 9 2 Finned coil 6 Water collecting basin 10 Drift eliminator 3 Air by-pass dampers with servo control (optional) 7 Air inlet louvers 11 Humidiﬁer pack 4 Wetting circuit of humidiﬁer pack, with spraying nozzles 8 Cooled ﬂuid outlet Inlet of ﬂuid to be cooled COOLER OPERATION AND CONTROL LOGIC PAD series Cool

Pagina 4-Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza n
• the control system has been...

Pagina 5 - Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza er operation and control logic...

er operation and control logic The cooler operation is automatically controlled by an electrical board provided with factory-programmed PLC according to the logic explained below. The electrical board can be operated either “automatically” or in “stand-by” (the latter mode can be used in case of emergency or for short maintenance works). Two types of operation are programmed in “automatic” mode: • • dry operation: in the winter season, when the air is not humidiﬁed (the adiabatic circuit is empty). In this case, the air enters the cooler from the top (dampers open, if provided), or crosses the dry humidiﬁer pack (pump circuit off) Dry operation adiabatic operation: in the summer season, when the air undergoes an adiabatic cooling process, the air enters the cooler from the lower part and crosses the humidiﬁer pack (dumpers closed and pump circuit on). Adiabatic operation * FLUID INLET/OUTLET TEMPERATURE AND WET BULB TEMPERATURE PAD 2 PAD 4 PAD 6 PAD 8 P

Pagina 5-Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza er operation and control logic
The cooler...

Pagina 6 - Turnuri de racire adiabatice MITA PAD Fisa tehnica Engleza AD 10

PAD 12

40 / 35 / 24 *
...

AD 10 PAD 12 40 / 35 / 24 * Efﬁciency, in KW 110 220 330 440 550 660 45 / 35 / 24 * Efﬁciency, in KW 130 260 390 530 660 800 35 / 30 / 24 * Efﬁciency, in KW 64 128 200 265 335 405 40 / 30 / 24 * Efﬁciency, in KW 82 165 253 340 430 525 ADIABATIC COOLER ** CONDENSING TEMPERATURE AND WET BULB TEMPERATURE. GAS R 134A PAD 2 PAD 4 PAD 6 PAD 8 PAD 10 PAD 12 50 / 24 ** Efﬁciency, in KW 160 326 495 660 827 994 45 / 24 ** Efﬁciency, in KW 130 260 390 530 660 800 40 / 24 ** Efﬁciency, in KW 95 190 295 395 495 595 ADIABATIC CONDENSER EXAMPLES OF WATER CONSUMPTION PER M2 OF SURFACE, UNDER DIFFERENT THERMO-HYGROMETRIC CONDITIONS OF INLET AIR (values referring to maximum heat output) Dry air inlet temperature (°C) Relative humidity at the inlet (%) Corresponding wet bulb temperature (°C) Adiabatically cooled air temperature (°C) Relative humidity at the outlet (%) Water consumption ( kg / h / m2) Case 1 35 40