Diesel engine waste-heat power cycle

This article demonstrates a possibility for increasing the power output from diesel engines and improving the fuel economy for such engines. This is achieved by employing a power cycle which is driven by the engine waste heat in the cooling water and by the exhaust gases. For road engines an organic fluid Rankine cycle is employed. R-12 is evaporated in a boiler fired by the coolant waste heat. This is superheated using the exhaust gases before it is introduced to a turbine where it expands down to an air-cooled condenser. The cycle power output can supplement the base engine power by about 16% of its output. For stationary diesel engines, however, water is used in a steam Brayton power cycle. The steam released from the cooling water in a flashing chamber is compressed by a vapour compressor and superheated by the exhaust gases. This steam is admitted to a turbine coupled to the compressor and the balance of the shaft power is the net output from the cycle. This amounts to about 15.3% of the base engine output. The power cycles employed neither interfere with the operation of the base engine nor do they deny the application of a turbo-charger to it. The thermodynamic analysis for the cycles is given and the results show the potential of employing such cycles on improving the diesel engines power output by up to 16%.

Diesel engine waste heat power cycle

Marginal operation field of existing MSF distillation plants

Computational modelling of thermofluid flashing in MSF desalination

Literature survey of droplet entrainment from water pools

Report regarding "the importance of various parameters on the length of a typical stage in a multi-stage sea water flash evaporator" (p. 1). Parameter values were examined to determine their influence on chamber length.

Westgarth Co. Richardsons

Papers

Chamber Geometry in Multi-Stage Flash Evaporators