Experimental and thermodynamic investigation of an ammonia/water diffusion absorption machine

Detailed thermodynamic analysis of a diffusion-absorption refrigeration cycle

“…However, recent investigations of a small capacity DAR in our research unit [16,31,37] show that the steady-state temperature measured in various locations of the refrigerator are comparable to those calculated by the model for similar operating conditions. For example, the mean evaporator temperature predicted by the present model for a driving heat temperature of 177 C is À16 C, fairly comparable to the temperature measured: À19 C at the evaporator for 180 C in the generator.…”

“…A set of basic input data for the simulations are also given in Table 2. The reported temperatures are based on experimental measurements realized in our laboratory on a commercial low capacity DAR [31].…”

Searching for the energy efficient operation modes of absorption refrigeration devices

“…-rational use of artificial cold [11,12]; -improvement in the modes of operation, means and systems of the ARD control.…”

“…However, in this case further improvement of SAC of ARD requires cancelling a standard electromechanical direct action controller and realization of a new regulator in digital or analog variant. Thus, a large number of papers [6][7][8][9][10][11][12][13][14][15][16] are devoted to solving the problem of increasing the ARD energy efficiency, connected, in particular, to the development of efficient modes of operation of ARD, to the methods of their control, as well as the systems of automatic control (SAC). The prospect of such directions of improvement of ARD consists, in the first place, in the universality -possibility of application both in the new ARD models and in those already put into practice.…”

Investigation the effects of different heat inputs supplied to the generator on the energy performance in diffusion absorption refrigeration systems

“…examined in nano-size in the diffusion absorption coolers regarding to the heat performance of the system. They indicated that the system with nanoparticles provided better absorption of heat from the generator and faster evaporation of the cooler from the cooling/absorption fluid Mazouz et al (2014). presented results of experimental and thermodynamic investigations on a commercial absorption diffusion device.…”