( ( ( This sweeping ) ( of ( ( ( ( ( the ( water-cooled surfaces ) ) , ) ( in ( the furnace ) ) ) , ) ( by ( the gas ) ) ) ) ) ( ( increases ( the ( evaporation rate ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (JJ sweeping)) (PP (IN of) (NP (NP (NP (DT the) (JJ water-cooled) (NNS surfaces)) (, ,) (PP (IN in) (NP (DT the) (NN furnace))) (, ,)) (PP (IN by) (NP (DT the) (NN gas)))))) (VP (VBZ increases) (NP (DT the) (NN evaporation) (NN rate))) (. .)))
This sweeping of the water-cooled surfaces, in the furnace, by the gas increases the evaporation rate.
(ROOT (S (NP (NP (DT The) (NN impact)) (PP (IN of) (NP (NP (JJ evaporative) (NN loss)) (PP (IN of) (NP (NP (DT the) (ADJP (RBS most) (JJ energetic)) (NN water) (NNS molecules)) (PP (IN from) (NP (DT a) (NN surface)))))))) (VP (VBZ has) (NP (NP (DT the) (NN impact)) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ cools) (NP (PRP it))))))) (. .)))
The impact of evaporative loss of the most energetic water molecules from a surface has the impact that it cools it.