Black liquor evaporation is generally the most energy intensive unit operation in a pulp and paper manufacturing facility. The black evaporators can represent third or more of total mill steam usage, followed by machine digester. Evaporator economy defined as mass required to evaporate water from (i.e., lb/lb kg/kg.) determined number effects an evaporator train system configuration. Older syst...

This paper presents the experimental and theoretical assessment of thermal behaviour a roll-bond evaporator in small-scale household refrigerator using refrigerant R600a as working fluid. The data were compared with general correlation employed to evaluate heat transfer convection (HTC) radiation vertical horizontal plates evaporator. is placed at top side refrigerator. To provide right boundar...

Ultrablack materials have attracted wide attention due to their high light absorbance and efficient photothermal conversion used in the field of solar steam generation alleviate drinking water crisis. Herein, ultrablack low‐cost poly(vinyl alcohol)‐graphite composite xerogels (PGCXs) that vertically arranged pores thermal conductivities are fabricated. The PGCX‐50% shows (95.44%), good wettabil...

The principle and implementation procedure of genetic algorithms were introduced and were applied to optnmze the parameters of fuzzy controller which control the superheat of evaporator in refrigeration system. Simulation results of performance of optimized fuzzy control rules, comparing with the primary rules, were obtained.

Flat-plate loop heat pipe (FLHP) is a passive two-phase transfer device. Comparing with traditional LHP cylindrical evaporator, it can be directly connected to flat source without the employment of saddle, which effectively reduce system thermal resistance and enhance temperature uniformity. In this work, stainless steel-ammonia FLHP was developed, extensive experiments have been conducted inve...

In this work, the performance of an innovative evaporator based on water falling film was investigated. The studied has been equipped with a recirculation system to maximise wetted surface. Tests have carried out in lab-scale adsorption unit connected test bench recently realised at Politecnico di Milano labs for evaluating heat transfer performances under realistic operating conditions. Severa...