Now a days, In most of the thermal power plant, where low-pressure steam is being exhausted to the atmosphere as a waste steam. This waste heat could be use to operate many small preheating or cooling equipments or small scale plants. There are many refrigeration systems present for refrigeration and air condition purpose. Such as air refrigeration, vapour compression, vapour absorption etc. In...

Water as a refrigerant (R718) is compared with other modern refrigerants (R717, R290 R134a, R12, R22, and R152a) regarding refrigeration capacity and COP (coefficient of performance). A computer program simulating a theoretical vapor compression refrigeration cycle was developed to calculate COPs, compression ratios, and discharge temperatures of the refrigerants from the compressor. The effect...

This paper describes an ejector model for the prediction of on-design performance under available conditions. is a direct method calculating optimal (entrainment ratio or ER) without need iterative methods, which have been conventionally used. The values three efficiencies used to account losses in are calculated by using systematic approach (by employing CFD analysis) rather than hit and trial...

BACKGROUND Needle cricothyrotomy and subsequent transtracheal jet ventilation (TTJV) is one of the last options to restore oxygenation while managing an airway emergency. However, in cases of complete upper airway obstruction, conventional TTJV is ineffective and dangerous. We transformed a small, industrial ejector into a simple, manual ventilator providing expiratory ventilation assistance (E...

The article studies the work of a water jet pump (ejector), influence mixture characteristics and pipe length on energy parameters ejector system. relevance topic is associated with active use ejectors in modern world various areas, including hydraulic structures. Frequent ensured by high reliability, simplicity design maintenance. purpose this to study operation ejector, flow transported two-p...

Limp materials like textiles, leather, porous tissues, meat and fish fillets do represent challenges in automation. A universal gripping principle that is usable for all these materials is not known. This paper describes a new gripping principle based on a novel Coanda effect ejector meeting these challenges. This ejector allows the construction of a slim, plate-shaped vacuum gripper with multi...