Skip to:ContentBottom
Experimental investigation of a combi boiler heat exchanger için kapak resmi
Experimental investigation of a combi boiler heat exchanger
Experimental investigation of a combi boiler heat exchanger
Kara, Mehmet, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
xv, 76 leaves: color illustrarions, charts;+ 1 computer laser optical disc.
The combi boilers are divided into two types, condensing and conventional, in terms of waste gas heat recovery. In conventional types, the condensation occurrence is undesirable, and over time it causes corrosion in the main heat exchangers, which decrease the efficiency and the lifetime. Although life tests are performed to check if the condensation has occurred or not over time, these tests take a long time and require the high cost. In this thesis, it is aimed to find a heat transfer correlation and use the calculation method instead of life tests. Two different topics were investigated on three appliances with different design parameters in order to find out in which conditions the condensation on the heat exchangers has occurred. As the first topic, influences of the fresh air amount in combustion equations, on condensation was tested in conventional appliances of Type B and C. As the second subject, the effects of the exchanger design parameters on the condensation were tested by using copper finned and stainless steel finned heat exchangers. For this study, mapping tests were carried out in the laboratories of Bosch Thermotechnology in Manisa and the measurement results of CO2 percentages and temperature distributions of the combustion over the exchanger were used. Using mapping test data, different condensation temperatures were calculated for three appliances depending on the fresh air amount and exchanger design parameters. These variables are able to be used in the heat transfer correlation to make improvements on the condensation point without making life tests.
Konu Başlığı:
Yazar Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)--İzmir Institute of Technology: Mechanical Engineering.

İzmir Institute of Technology:Mechanical Engineering--Thesis (Master).
Elektronik Erişim:
Access to Electronic Versiyon.
Ayırtma: Copies: