Abstract: The invention relates to a cooling plant an a method of cleaning such cooling plant. The cooling plant comprises a cooling chamber and at least one blower with a blast exit for circulating gas in the cooling chamber. The cooling plant further comprises an at least partly removable screen and a surface treatment liquid supply. The removable screen comprises a hole structure with a first and a second side and a plurality of holes extending from the first to the second side. The screen is arranged such that it totally or partly covers the blast exit in a first position so that at least a part of the gas supplied from the blast exit passes directly from the blast exit and through the hole structure from the first side thereof. The surface treatment liquid supply being arranged to supply a surface treatment liquid at least partly on the first side of said hole structure.

Abstract: A method for leakage control and localization of leakages in a plate heat exchanger includes supplying a solution containing a fluorescent colorant to one of either a primary passageway or a secondary passageway of the heat exchanger, supplying a clear liquid to the opposite passageway, recycling the clear liquid, and detecting the presence of the fluorescent colorant in the clear liquid.