Calculated heat loss determination of the thickness of scale on the heating surfaces of the boiler | boilers and combined heat and power
As a sample calculation we will KVGM boiler-4-150. Boiler alphatech heating surface - 86.75 m 2, passport efficiency - 93.9%, thermal power - 4.65 MW. For other types of boilers differences in the results of the calculation will be irrelevant, since the ratio of heat output to the heating surface will be similar.
where t b = 1200 - 150 = 1050 C - a large temperature difference in heat exchange; t m = 153.8 - 70 = 83,8 C - smaller temperature difference; 1200 C - temperature combustion in the boiler furnace, 153, 8 C - the temperature of the flue gas boiler without impurities (excluding dilution air).
We define the efficiency of the boiler contaminated with scale:
It should be noted that a similar reduction in efficiency occurs substantially only scale having a porous structure. According alphatech to the literature, the thermal conductivity of scale is 0.2-5 W / m 2 K for carbonate scale, 0.5-2 W / m 2 K for gypsum scale, 0.07-0.2 W / m 2 - K for silicate scale and 0.1 W / m 2 K for scale oil-soaked.
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Our clients in Ukraine: Kiev, Kharkov, Odessa, Dnipropetrovsk, Donetsk, Zaporozhye, Lvov, Krivoy Rog, Nikolaev, Mariupol, Lugansk, Sevastopol, Vinnitsa, Makeyevka, Simferopol, Kherson, Poltava, Chernihiv, Cherkasy, Zhytomyr, Sumy, Khmelnytsky, Gorlivka, Rivne, Kirovograd, Dniprodzerzhyns'k, Chernivtsi, Kremenchug, alphatech Ivano-Frankivsk, Ternopil, alphatech White Church, Lutsk, Kramatorsk, Melitopol, Kerch, Nikopol, Severodonetsk Slovyansk, Berdyansk, Uzhgorod, Alchevs'k, Pavlograd, Evpatoria Lisicansk, Kamenetz-Podolsk . Region: Kiev region, Donetsk region, Dnipropetrovsk, Kharkiv region, Lviv region, Odessa region, Lugansk region, the Autonomous Republic of Crimea, Zaporizhia region, Vinnytsia region, Poltava alphatech region, Ivano-Frankivsk region, Khmelnytsky region, Cherkasy region, Zhytomyr region, Transcarpathian region, Mykolayiv alphatech region, Sumy region, Rivne region, Chernihiv region, Kherson region, Ternopil region, Volyn region, Kirovohrad region, Chernivtsi region.
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As a sample calculation we will KVGM boiler-4-150. Boiler alphatech heating surface - 86.75 m 2, passport efficiency - 93.9%, thermal power - 4.65 MW. For other types of boilers differences in the results of the calculation will be irrelevant, since the ratio of heat output to the heating surface will be similar.
where t b = 1200 - 150 = 1050 C - a large temperature difference in heat exchange; t m = 153.8 - 70 = 83,8 C - smaller temperature difference; 1200 C - temperature combustion in the boiler furnace, 153, 8 C - the temperature of the flue gas boiler without impurities (excluding dilution air).
We define the efficiency of the boiler contaminated with scale:
It should be noted that a similar reduction in efficiency occurs substantially only scale having a porous structure. According alphatech to the literature, the thermal conductivity of scale is 0.2-5 W / m 2 K for carbonate scale, 0.5-2 W / m 2 K for gypsum scale, 0.07-0.2 W / m 2 - K for silicate scale and 0.1 W / m 2 K for scale oil-soaked.
You may use these HTML tags and attributes: <a href="" title=""> <abbr alphatech title=""> alphatech <acronym title=""> <b> alphatech <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>
Select Category Journal FAQ (5) Destinations (16) Security (6) Biofuels (6) Heat pumps (1) Energy Saving (6) Equipment (33) Types of Equipment (24) Water heaters (5) Burners (2) Boilers (10) Heat generators (2) Heat (5) Electric boilers (1) Resale (10) Manufacturers (14) Clayton (6) ÖKO THERM (1) Promgazapparat (3) Chemical Automation (1) Objects (17) Automation (1) Water boiler (1) Gas (2) Hot water supply alphatech (1) Heating (8) Air heating (2) steam boiler (5) Reference (2) Services (7) Service (2) Design and construction (2) Design (2) Chemical Wash (3)
Our clients in Ukraine: Kiev, Kharkov, Odessa, Dnipropetrovsk, Donetsk, Zaporozhye, Lvov, Krivoy Rog, Nikolaev, Mariupol, Lugansk, Sevastopol, Vinnitsa, Makeyevka, Simferopol, Kherson, Poltava, Chernihiv, Cherkasy, Zhytomyr, Sumy, Khmelnytsky, Gorlivka, Rivne, Kirovograd, Dniprodzerzhyns'k, Chernivtsi, Kremenchug, alphatech Ivano-Frankivsk, Ternopil, alphatech White Church, Lutsk, Kramatorsk, Melitopol, Kerch, Nikopol, Severodonetsk Slovyansk, Berdyansk, Uzhgorod, Alchevs'k, Pavlograd, Evpatoria Lisicansk, Kamenetz-Podolsk . Region: Kiev region, Donetsk region, Dnipropetrovsk, Kharkiv region, Lviv region, Odessa region, Lugansk region, the Autonomous Republic of Crimea, Zaporizhia region, Vinnytsia region, Poltava alphatech region, Ivano-Frankivsk region, Khmelnytsky region, Cherkasy region, Zhytomyr region, Transcarpathian region, Mykolayiv alphatech region, Sumy region, Rivne region, Chernihiv region, Kherson region, Ternopil region, Volyn region, Kirovohrad region, Chernivtsi region.
Agreement on the use
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