SOLUTION WITH PCF HYDRO BY ERI CORPORATION S.R.L
PCF Hydro, air cooled heat exchangers manufactured by ERI Corporation S.r.l, have a special coating that allows in summer to be sprayed with water on the exhaust air side of the plate. In this way, we have a condensation effect that cools the supply air till 11°C.
Since ancient times the condensation effect of water have been used for cooling proposes. The biggest advantage is that almost no consumption of electrical power is needed. This allows using these methods also in older buildings without the necessity to change the previous electrical system.
COOLING LOAD IN BUILDINGS
Due to the thicker building envelope we have more and more the application of ventilation systems. But in the small and medium air ventilation systems there are no active cooling systems. The warm load during hot period cannot be compensated through the passive cooling of the counter-flow heat exchanger. The consequence is that rooms are overheated air ventilation system does not work correctly with a negative impact on people. This situation is typical in offices with negative consequences on concentration and work capacities.
COUNTER-FLOW hydro HEAT EXCHANGER 3D MODEL
HOW IT WORKS: AIR COOLED HYDRO HEAT EXCHANGER
DIRECT EVAPORATING COOLING
The evaporating cooling works on a very simple principle. The water sprayed on the exhaust side evaporates as it is heated from the very warm outside air. During the transformation from water in steam with 19 liters it is possible to reach a cooling performance of 1 kW.
Applying cooling water on the exhaust side, thanks to the waterproofed PCF Hydro counter-flow plate heat exchanger there is no possibility that water arrives on the supply side.
Water remaining is canalized in a condensation tub and then hygienically removed through a sewage system.
HYDRO HEAT EXCHANGER WORKING PRINCIPLE
COUNTER-FLOW EXCHANGER PCF HYDRO FOR DOMESTIC AIR VENTILATION SYSTEMS
SUMMER AND WINTER AIR COMFORT
In traditional domestic ventilation systems with counter-flow plates, with outside temperature of 35°C the supply air temperature reaches peaks of 30°C (red line). Spraying water on the exhaust air it’s possible to keep the supply air temperatures on a constant value 21 °C (green line). In this way, it is possible to bring fresh and comfort air in the buildings even during hot season.
A very important advantage of this system is that in extreme outside temperature conditions over 38°C, it is possible to improve the cooling performances simply adding more water.
Temperature curve of a domestic ventilations system with 85% efficiency
COUNTER-FLOW hydro HEAT EXCHANGER image gallery
AIR COOLED HEAT EXCHANGER FOR ADIABATIC FOR VENTILATION SYSTEMS UP TO 5000 M3/H
PCF HYDRO FOR HVAC
In HVAC the counter-flow plates are sprayed with water through fix nozzles. An electronic device assures the correct application of water quantity on the plate’s surface according specific necessities. Also, it can be used in data center cooling system.
HYDRO HEAT EXCHANGER IN HX DIAGRAM
In the hx Diagram the hydro heat exchanger on the supply side behaves like a cooler. In main cases the active evaporative cooling is more than sufficient to grant a comfort supply air even in very hot summer days.