MODULAR COUNTERSTREAM SPIRAL HEAT EXCHANGER

The exchanger comprises one or more spirals (1) that are linked by collectors (2,3,4,5). Each spiral (1) is made of pipe (10) containing inside itself seven pipes (11) of the same diameter, that are jointly bent in the elipse form, out of which two free arms come out. In the collector (2) primary fluid is separated and it runs through seven pipes (11) of each spiral, and in the collector (3) it is gathered from all the spirals and flows out of the exchanger. In the collector (5) the secondary fluid is split in spirals and it runs through the interspace of outer pipe (10) and inner pipe (11), and in the collector (4) it is gathered from all the sprials and flows out of the exchanger. The essence of the invention of this exchanger is in sprial and its particular cross-section, i.e. particular cross-section of the secondary fluid flow. In this way, a long heat exchange is obtained, increase in the heat coefficient, reduction of gabarites, weight and scale sedimentation. Heat exchanger like this, is used in central heating substations. Izmenivac se sastoji od jedne ili vise spirala (1), koje se povezuju sabiracima (2, 3, 4, 5). Svaku spiralu (1) cini cev (10) u kojoj se nalazi sedam cevi (11) istog poluprecnika, koje su zajedno spojene u obliku elipse, iz koje izlaze dva slobodna kraka. U sabijacu (2) primarni fluid se razdvaja i protice kroz sedam cevi (11) svake spirale, a u sabiracu (3) se sakuplja iz svih spirala i izlazi iz izmenjivaca. U sabiracu (5) sekundarni fluid se razdvaja u spirale i protice kroz medjuprostor spoljasnje cevi (10) i unutrasnjih cevi (11), a u sabiracu (4) se sakuplja iz svih spirala i izlazi iz izmenjivaca. Sustina pronalaska ovakvog izmenjivaca je spirala i njen specifican poprecni presek, odnosno specifican protocni presek sekundarnog fluida. Na ovaj nacin je omogucen dug put izmene toplote, povecanje koeficijenta prelaza toplote, smanjenje gabarita, tezine i talozenje kamenca. Ovakav izmenjivac toplote, se koristi u podstanicama centralnog grejanja. Izmeniva se sastoji od jedne ili više spirala (1), koje se povezuju sabira ima (2, 3, 4, 5). Svaku spiralu (1) ini cev (10) u kojoj se nalazi sedam cevi (11) istog polupre nika, koje su zajedno spojene u obliku elipse, iz koje izlaze dva slobodna kraka. U sabija u (2) primarni fluid se razdvaja i proti e kroz sedam cevi (11) svake spirale, a u sabira u (3) se sakuplja iz svih spirala i izlazi iz izmenjiva a. U sabira u (5) sekundarni fluid se razdvaja u spirale i proti e kroz medjupr