An investigation of heat recovery of submarine diesel engines for combined cooling, heating and power systems

Abstract High temperature and mass flow rate of the exhaust gases of submarine diesel engines provide an appropriate potential for their thermal recovery. The current study introduces a combined cooling, heating and power system for thermal recovery of submarine diesel engines. The cooling system is composed of a mixed effect absorption chiller with two high and low pressure generators. The exhaust of the diesel engine is used in the high pressure generator, and the low pressure generator was divided into two parts. The required heat for the first and second compartments is supplied by the cooling water of the engine and condensation of the vapor generated in the high pressure generator, respectively. The power generation system is a Rankine cycle with an organic working fluid, which is considered a normal thermal system to supply hot water. The whole system is encoded based on mass stability, condensation and energy equations. The obtained findings showed that the maximum heat recovery for the power cycle occurs in exhaust gas mass ratio of 0.23–0.29 and working fluid mass flow rate of 0.45–0.57 kg/s. Further, for each specific mass ratio of exhaust gas, only a certain range of working fluid mass flow rate is used. In the refrigerant mass flow rate of 0.6 kg/s and exhaust gas mass ratio of 0.27, the power output of the cycle is 53 kW, which can also be achieved by simultaneous increase of refrigerant mass flow rate and exhaust gas mass ratio in a certain range of higher powers. In the next section, the overall distribution diagram of output water temperature of the thermal system is obtained according to the exhaust gas mass ratio in various mass flow rates, which can increase the potential of designing and controlling the thermal system. The effect of parameters of this system on output water temperature was also analyzed. Finally, the performance of mixed effect absorption chiller was examined and the findings indicated that in the exhaust gas mass ratio of 0.375, the system has a coefficient of performance equal to 0.94. The output water temperature of evaporator in this state is 3.64 °C and the cooling system power is 176.87 kW.

[1]  Seok Hun Kang,et al.  Design and experimental study of ORC (organic Rankine cycle) and radial turbine using R245fa working fluid , 2012 .

[2]  Gequn Shu,et al.  A review of researches on thermal exhaust heat recovery with Rankine cycle , 2011 .

[3]  Wang Hui-tao.  Experimental Study on Evaporating Heat Transfer Characteristics of HFC-245fa , 2011 .

[4]  Hong Guang Zhang,et al.  Heat transfer analysis of a finned-tube evaporator for engine exhaust heat recovery , 2013 .

[5]  R. Webb.  Enhanced Heat Transfer , 2010 .

[6]  J. Larjola,et al.  Electricity from industrial waste heat using high-speed organic Rankine cycle (ORC) , 1995 .

[7]  Ruiqi Zhu,et al.  Experimental investigation on an adsorption system for producing chilled water , 1992 .

[8]  Gerhard Regner,et al.  Waste Heat Recovery of Heavy-Duty Diesel Engines by Organic Rankine Cycle Part II: Working Fluids for WHR-ORC , 2007 .

[9]  José Carlos Charamba Dutra,et al.  Energetic and exergetic study of a 10RT absorption chiller integrated into a microgeneration system , 2014 .

[10]  Rabah Gomri,et al.  Simulation study on the performance of solar/natural gas absorption cooling chillers , 2013 .

[11]  Wenhua Li,et al.  Operation optimization of an organic rankine cycle (ORC) heat recovery power plant , 2011 .

[12]  Yu. V. Mamonov,et al.  Expressions for thermophysical properties of superheated steam , 1999 .

[13]  G. Tan,et al.  A review of thermoelectric cooling: Materials, modeling and applications , 2014 .

[14]  Motoyuki Suzuki,et al.  Application of adsorption cooling systems to automobiles , 1993 .

[15]  M. McLinden,et al.  NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 8.0 , 2007 .

[16]  Le Zhang,et al.  Design and testing of an automobile waste heat adsorption cooling system , 2000 .

[17]  Gerhard Regner,et al.  Achieving High Engine Efficiency for Heavy-Duty Diesel Engines by Waste Heat Recovery Using Supercritical Organic-Fluid Rankine Cycle , 2006 .

[18]  S. M. Ghiaasiaan.  TWO-PHASE FLOW, BOILING AND CONDENSATION IN CONVENTIONAL AND MINIATURE SYSTEMS , 2007 .

[19]  Sandeep K. S. Gupta,et al.  Thermodynamic feasibility of harvesting data center waste heat to drive an absorption chiller , 2012 .

[20]  Ruzhu Wang,et al.  A novel variable effect LiBr-water absorption refrigeration cycle , 2013 .

[21]  Minggao Ouyang,et al.  Study of working fluid selection of organic Rankine cycle (ORC) for engine waste heat recovery , 2011 .

[22]  Ke Zeng,et al.  New Technology of Thermodynamic Cycle for Waste Heat Recovery of Vehicle Gasoline Engine , 2009, 2009 Asia-Pacific Power and Energy Engineering Conference.

[23]  Min Chen,et al.  Computational Simulation of Thermoelectric Generators in Marine Power Plants , 2011 .

[24]  I. Horuz,et al.  A comparison between ammonia-water and water-lithium bromide solutions in absorption heat transformers , 2001 .

[25]  V. Gnielinski.  New equations for heat and mass transfer in turbulent pipe and channel flow , 1976 .

[26]  S. K. Wang,et al.  A Review of Organic Rankine Cycles (ORCs) for the Recovery of Low-grade Waste Heat , 1997 .

[27]  Jinliang Xu,et al.  The optimal evaporation temperature and working fluids for subcritical organic Rankine cycle , 2012 .

[28]  Felix Hueber,et al.  Principles Of Enhanced Heat Transfer , 2016 .

[29]  Ling Wang,et al.  Performance estimation of an adsorption cooling system for automobile waste heat recovery , 1997 .

[30]  J. Pátek,et al.  A computationally effective formulation of the thermodynamic properties of LiBr-H2O solutions from 273 to 500 K over full composition range , 2006 .

[31]  Henrik Kofoed Nielsen,et al.  Potential for Usage of Thermoelectric Generators on Ships , 2010 .