... fouling. This study, along with the single-tube experiments, presents a systematic approach to design exhaust-coupled heat exchangers while considering the effects of fouling. These results are applicable for a wide range of waste-heat recovery applications, and this method can be extended to different...

...Patrick Luckow; Avram Bar-Cohen; Peter Rodgers; Juan Cevallos The compression process necessary for the liquefaction of natural gas on offshore platforms generates large amounts of heat, usually dissipated via sea water cooled plate heat exchangers. To date, the corrosive nature of sea water has...

... of the vaporized LNG. In this paper, the system performance of this transcritical cycle is calculated. The influences of the highest cycle temperature and pressure to system specific work, exergy efficiency, and liquefied CO 2 mass flow rate are analyzed. The exergy loss in each of the heat exchangers is also...

...M. J. Morales; S. A. Sherif The purpose of this study is to investigate how the heat exchanger inventory allocation plays a role in maximizing the thermal performance of a two-stage refrigeration system with two evaporators. First, the system is modeled as a Carnot refrigerator and a particular...

.... In addition, it is important to consider the utilization of the various circulating media (i.e., working fluid, cooling water, and heat resource) and heat exchanger area per unit power produced. For given conditions, an optimum range of operating pressure and ammonia fraction can be identified that result...

...) the potential for advanced thermoelectric systems in vehicle energy recovery and (2) the inherently complex interaction between thermal system performance and thermoelectric device optimization in energy recovery. Potential power generation at specific exhaust temperature levels and for various heat exchanger...

... and total heat transfer area are calculated for a fixed evaporator face length. In this way, the effect of changes in the geometry on the total number of exergy destruction units of the heat exchange process is investigated. The optimum balance between the three components of irreversibility ( I ̇ Δ P , I...

... highly irreversible. The requirement to operate below the metallurgical limit adds to the irreversibility of practical combustion systems. Furthermore, the use of heat exchangers, which must have finite temperature differences between fluid streams, compounds the exergy consumption. The fuel cell...

... of the compressor and the conditioned space is still unreported. The results presented here are obtained for a room air conditioner with Zr 0.9 Ti 0.1 Cr 0.55 Fe 1.45 as the hydrogen absorbing material and employing standard heat exchanger configurations. Though previous thermodynamic and transient studies...

... power stations heat exchangers In the last step of the diagnosis procedure proposed in 1 , the productive structure is used as a linear thermoeconomic model of the components. In this way, through simulation of the behavior of the components as their resources vary due to small perturbations...

...Tomasz Śliwa; Andrzej Gonet The paper deals with the possible use of existing oil wells for geothermal energy production. A mathematical model, describing the process of exploitation of a borehole heat exchanger, has been worked out. It was used for determining energy efficiency, employing the main...

...Matthew G. Sutton; Darin W. Nutter; Rick J. Couvillion A new ground resistance was developed for use in existing vertical bore heat exchanger VBHE x design algorithms. The new ground resistance accounts for the added heat transfer mode of convection due to groundwater flow by using as its...

...Husain Al-Muslim; Ibrahim Dincer; Syed M. Zubair In a refinery distillation plant, there are many components of interest to be analyzed thermodynamically, e.g., the crude oil heating furnace, the distillation column and a network of heat exchangers. Previous studies showed that the highest exergy...

...Mohamed A. Antar; Syed M. Zubair Thermoeconomics is defined as attaching monetary values to heat exchanger conductances of a given plant. In this study, optimum allocation of heat transfer inventory for heat exchangers in a refrigeration system with specified power input or cooling capacity...

...Man-Hoe Kim; Clark W. Bullard A performance evaluation for a residential window air conditioning system with microchannel condensers has been performed. First, a series of wind-tunnel calorimeter tests were conducted for two different prototype microchannel heat exchangers. The measured heat...

... was a generator-absorber heat exchange (GAX) cycle and was sized for residential and light commercial use, where very little absorption equipment is currently used. The components of the cycle were assembled with instrumentation, including flow meters, pressure transducers, and thermocouples. The findings...

...Y. T. Kang; Y. Fujita; T. Kashiwagi Experiments were conducted for ammonia-water falling film absorption in a plate heat exchanger with offset strip fins. The objectives of this paper were to analyze combined heat and mass transfer during the ammonia-water absorption process under different inlet...

... November 1999 06 November 2000 heat exchangers refrigerators evaporation pressure measurement flow Circuitry Fin-and-Tube Heat Exchanger Pressure Drops Plate fin-and-tube heat exchangers are widely used in the air-conditioning and refrigeration industry. The heat exchangers...

... mass flow rate, and hence a corresponding decrease in the system capacity. These schemes are investigated for HFC-134a by considering finite size of the components that are used in the refrigeration systems. The models consider the finite-temperature difference in the heat exchangers, thus allowing...

... of these irreversibilities on the performance of the system. The profit of operating the heat pump system is taken as an objective function for optimization. The maximum profit is calculated for a given total heat transfer area or total thermal conductance of heat exchangers. The coefficient of performance, heating load...