Thumbnail Image

Thesis

Browse

20181
Reset filters
Subject: Mechanical Engineering × End date: 2018 × Start date: 2013 × Type: Thesis × Thesis Type: M.Tech ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemRestricted
    Performance evaluation and analysis of forced draft paddy straw bale combustor for heating applications
    (Punjab Agricultural University, Ludhiana, 2018) Biswajeet Singh; Sethi, V.P.
    In this study, performance evaluation and analysis of predesigned forced draft paddy straw bale combustor (FDPSBC) furnace with intermittent pilot fuel injection system (PFIS) and embedded heat exchanger for generating high temperature flue gas for water heating and utilizing heat of generated flue gas and hot water to heat the greenhouse through the predesigned flue gas heat sink pipe network (FGHSPN) and hot water heat sink pipe network (HWHSPHN) is presented. Complete combustion of compressed bale of 20kg is achieved with the use of PFIS which delivered 1.5ml of diesel after every 3 min to maintain the flame sustainability.Stainless steel heat-exchanger has 62L water holding capacity circulating at the rate of 36 litre per min using the heat of flue gas and has the capacity to heat 1000L of water within three hours. Heat of combustion (>90% combustion efficiency)was utilized to generate flue gas at 350°C and hot water above 65°C applied to 100 m2area greenhouse heating located at Punjab Agricultural University, Ludhiana (30.56°N), Punjab, India by the predesigned two heat sink pipe networks; FGHSPN andHWHSPN laid inside the greenhouse for transfer of heat by radiation and free convection modes. Heat transfer models were developed to carry out the heat transfer analysis of combustor furnace, FGHSPN and HWHSPN. Developed mathematical models showed that insulation provided inside the combustor furnace reduced the heat loss by 91.7% through the combustor furnace wall whereasFGHSPN performed much better as compared to HWHSPN and was able to transfer 9.6 kW (74%) whereas HWHSPN could transfer 3.38 kW (26%) of heat respectively out of the total heat (12.98 kW) generated by both the networks to maintain the greenhouse air temperature 10°C higher than the ambient air temperature after sunset hours as validated by experimental trials conducted on 29 of November,2017 with a RMSE of 3.44.