Analyzing the Environmental Effects of Conventional and Condensing Combi Boilers Using Natural Gas

Year 2020, , 1277 - 1284, 01.12.2020

Halil İbrahim Variyenli , Ataollah Khanları

https://doi.org/10.2339/politeknik.592313

Cited By: 1

Abstract

Generally, space heating and hot water providing are
done by combi boilers. Different types of combi boilers are available. In the
recent years condensing combi boilers have been introduced that have high
energy efficiency in comparison with conventional types. In the condensing type
combi boilers, an additional heat exchanger is utilized to recover energy form
flue gas. In this study the effects of combi boiler type on pollutant gas
emissions have been experimentally analyzed. In this regard three different
combi boiler including conventional, condensing and full condensing type combi
boilers have been selected in the experiments. In addition, the experiments
have been done in different temperatures to investigate the temperature effect.
The obtained results showed that in all temperatures using condensing and full
condensing combi boilers reduced CO₂, NO and NO_x gas
emissions considerably. Also, by analyzing combi boilers emissions in different
working temperatures, it can be said that in low temperatures CO₂
emission reduction in condensing combi is higher than its reduction in high
temperatures in comparison with conventional one.

Keywords

Combi boiler, heat recovery, condensing, natural gas, pollutants gas emissions

References

• Afshari, F., Comakli, O., Karagoz, S., Zavaragh, H. G. (2018). A thermodynamic comparison between heat pump and refrigeration device using several refrigerants. Energy and Buildings, 168, 272-283.
• Afshari, F., Zavaragh, H. G., Di Nicola, G. (2018). Numerical analysis of ball-type turbulators in tube heat exchangers with computational fluid dynamic simulations. International journal of Environmental Science and Technology, DOI: 10.1007/s13762-018-2012-4.
• Aste, N., Adhikari, R. S., Compostella, J., Del Pero, C. (2013). Energy and environmental impact of domestic heating in Italy: Evaluation of national NOx emissions. Energy Policy, 53, 353-360.
• Atmaca, A. U., Erek, A., Altay, H. M. (2015). Investigation of transient behaviour of combi boiler type appliances for domestic hot water. Applied Thermal Engineering, 82, 129-140.
• Bălănescu, D. T., Homutescu, V. M. (2018). Experimental investigation on performance of a condensing boiler and economic evaluation in real operating conditions. Applied Thermal Engineering, 143, 48-58.
• Casanovas-Rubio, M. D. M., Armengou, J. (2018). Decision-making tool for the optimal selection of a domestic water-heating system considering economic, environmental and social criteria: Application to Barcelona (Spain). Renewable and Sustainable Energy Reviews, 91, 741-753.
• Comaklı, K. (2008). Economic and environmental comparison of natural gas fired conventional and condensing combi boilers. Journal of the Energy Institute, 81 (4), 242-246.
• Gürü, M., Sözen, A., Karakaya, U., Çiftçi, E. (2019). Influences of bentonite-deionized water nanofluid utilization at different concentrations on heat pipe performance: An experimental study. Applied Thermal Engineering, 148, 632-640.
• Haichao, W., Jiao, W., Lahdelma, R., Pinghua, R., Shuhui, Z. (2013). Atmospheric environmental impact assessment of a combined district heating system. Building and Environment, 64, 200-212.
• Khanlari, A., Sözen, A., Variyenli, H. İ. (2018). Simulation and experimental analysis of heat transfer characteristics in the plate type heat exchangers using TiO2/water nanofluid. International Journal of Numerical Methods for Heat & Fluid Flow, DOI 10.1108/HFF-05-2018-0191.
• Khanlari, A., Ay, İ. (2019a). A numerical study on determination of the optimal hole diameter and pitch value for the unglazed transpired solar collectors. Journal of Politeknik, 22 (1), 163-168.
• Khanlari, A., Sözen, A., Variyenli, H. İ., Gürü, M. (2019b). Comparison between heat transfer characteristics of TiO2/deionized water and kaolin/deionized water nanofluids in the plate heat exchanger. Heat Transfer Research, 50 (5), 435-450.
• Lomas, K. J., Oliveira, S., Warren, P., Haines, V. J., Chatterton, T., Beizaee, A., Prestwood, E., Gething, B. (2018). Do domestic heating controls save energy? A review of the evidence. Renewable and Sustainable Energy Reviews, 93, 52-75.
• Sözen A., Öztürk, A., Özalp, M., Çiftçi, E., Influences of alumina and fly ash nanofluid usage on the performance of recuperator including heat pipe bundle. International journal of Environmental Science and Technology, DOI: 10.1007/s13762-018-1832-6.
• Vignali, G., (2017). Environmental assessment of domestic boilers: A comparison of condensing and traditional technology using life cycle assessment methodology. Journal of Cleaner Production, 142, 2493-2508.
• Weiss, M., Dittmar, L., Junginger, M., Patel, M. K., Blok, K. (2009). Market diffusion, technological learning, and cost-benefit dynamics of condensing gas boilers in the Netherlands. Energy Policy, 37, 2962–2976.
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