Temperature optimisation of a diesel engine using exhaust gas heat recovery and thermal energy storage (diesel engine with thermal energy storage)

Abstract

Temperature optimisation of a diesel engine using exhaust gas heat recovery and thermal energy storage (Diesel engine with thermal energy storage). Applied Thermal Engineering, Elsevier, 2009, 30 (6-7), pp.631. <10.1016/j.applthermaleng.2009.11.008>. <hal-00544814> Accepted ManuscriptTemperature optimisation of a diesel engine using exhaust gas heat recovery and thermal energy storage (Diesel engine with thermal energy storage) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ACCEPTED MANUSCRIPT ABSTRACTModern automotive diesel engines are so energy efficient that they are heating up slowly and tend to run rather cold at subzero temperatures. The problem is especially severe in mail delivery operations where the average speed is low and the drive cycle includes plenty of idling. The problem is typically solved by adding a diesel fuelled additional engine heater which is used for the preheating of the engine during cold start and additional heating of the engine if the coolant temperature falls below a thermostat set point during the drive cycle. However, this additional heater may drastically increase the total fuel consumption and exhaust gas emissions of the vehicle. In this study the additional heater was replaced by a combination of exhaust gas heat recovery system and latent heat accumulator for thermal energy storage. The system was evaluated on a laboratory dynamometer using a simulated drive cycle and in field testing in the city of Oulu (65 °N), Finland in February 2009.

A Preliminary Study on the Application of Thermal Storage to Merchant Ships

“…Although TES systems have been largely studied in other industrial sectors, both in connection with Diesel engines [10][11][12] and in transportation [13,14], there is no record of TES application to shipping in the scientific literature. The aim of this paper is that of partially filling this gap with a study on the potential of said application and on the influence of relevant parameters on the performance of the system.…”

Investigations of fin geometry on heat exchanger performance by simulation and optimization methods for diesel exhaust application

“…Mavridou et al [16] examined two groups of configurations: (a) a classical shell and tube heat exchanger using staggered cross-flow and (b) a cross-flow plate heat exchanger, initially with finned surfaces on the exhaust gas side and then with metal foam material substituting for the fins and they attempt to minimize the volume and weight of the arrangement, while at the same time maintaining the heat transfer from the gas side at a maximum range. Kauranen et al [17] used phase change materials (PCM) and latent heat accumulator (LHA) for diesel exhaust waste heat recovery which helped to fuel economy and emissions reduction. In a different study, Baker et al [18] designed a multi-pass duct-shaped heat exchanger for a diesel engine by numerical finite difference method (FDM) and examined the effect of thermoelectric generators (TEGs), porous structure and fins in heat recovery amount which found the 1.06 kW maximum net electrical powers achieved for the three parallel flow paths in a counter-flow arrangement.…”

Potential of exhaust heat recovery for intake charge heating in a diesel engine transient operation at cold conditions

“…Broatch et al [10] evaluated the potential of an intake air heating technology, by means of electrical heaters, for the reduction of pollutant emissions from diesel engine combustion during a NEDC cycle, showing a reduction of 13% in HC, 5% in CO and 3% in NOx but particulate matter increases about 4%. Kauranen [11] proposes a double heat recovery system from the combination of exhaust gas heat recovery system and latent heat accumulator for thermal energy storage, using the energy to heat the engine coolant during a cold start and low engine load.…”