Reliability and Availability Consideration in Design of an Ammonia-Water CHP System for a Low-Temperature Geothermal Source

2022 ◽  
pp. 51-82
Author(s):  
Hadi Rostamzadeh ◽  
Afshin Yaghoubi ◽  
Saeed Ghavami Gargari ◽  
Majid Amidpour ◽  
Weifeng He
Keyword(s):  
Low Temperature ◽  
Ammonia Water ◽  
Chp System ◽  
Reliability And Availability

Separation of Ammonia/Water/Sodium Hydroxide Mixtures Using Reverse Osmosis Membranes for Low Temperature Driven Absorption Chillers

2008 ◽  
Vol 47 (24) ◽  
pp. 10020-10026 ◽  
Author(s):  
Simona Steiu ◽  
Joan Carles Bruno ◽  
Alberto Coronas ◽  
Ma Fresnedo San Roman ◽  
Inmaculada Ortiz
Keyword(s):  
Low Temperature ◽  
Sodium Hydroxide ◽  
Reverse Osmosis ◽  
Ammonia Water ◽  
Absorption Chillers ◽  
Reverse Osmosis Membranes

Low temperature hydrolysis of laboratory tholins in ammonia-water solutions: Implications for prebiotic chemistry on Titan

Icarus ◽  
2009 ◽  
Vol 201 (1) ◽  
pp. 412-421 ◽  
Author(s):  
Catherine D. Neish ◽  
Árpád Somogyi ◽  
Jonathan I. Lunine ◽  
Mark A. Smith
Keyword(s):  
Low Temperature ◽  
Prebiotic Chemistry ◽  
Ammonia Water ◽  
Water Solutions ◽  
Hydrolysis Of

Experimental Results of an Ammonia-Water Mixture Turbine System: Effectiveness With a Low Temperature Heat Source

2004 ◽  
Author(s):  
Keisuke Takeshita ◽  
Kouji Morimoto ◽  
Yoshiharu Amano ◽  
Takumi Hashizume
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Steam Turbine ◽  
Back Pressure ◽  
Experimental Results ◽  
Water Mixture ◽  
Heat Sources ◽  
Sensible Heat ◽  
Ammonia Water ◽  
Temperature Heat

This paper presents an experimental investigation of the effectiveness of an AWM (Ammonia-Water Mixture) turbine system with low temperature heat sources. The AWM turbine system (AWMTS) features Kalina cycle technology, namely, it employs an ammonia-water mixture as the working fluid and includes a separation / absorption process of NH3-H2O. Since AWM is a non-azeotropic mixture, its temperature changes during evaporation and condensation. This behavior gives AWMTS the advantage of heat recovery from a sensible heat source such as exhaust gas. It is known that an AWMTS can generate more power than a Rankine cycle system from 250–650°C sensible heat sources. The authors constructed a 70 KW-experimental facility and investigated the practical applications of AWMTS. It is located at the bottoming stage below a conventional combined cycle composed of a gas turbine and a steam turbine. Its heat source is the exhaust steam from a back pressure steam turbine at the middle stage of the system. The experiment was carried out with changing the back pressure of the steam turbine. The experimental results show that power generation is possible from 138 to 162 °C heat source steam.

Ammonia-Water Low-Temperature Thermal Storage System

1998 ◽  
Vol 120 (1) ◽  
pp. 25-31 ◽  
Author(s):  
J. J. Rizza
Keyword(s):  
Low Temperature ◽  
Heat Pump ◽  
Water Solution ◽  
Storage System ◽  
Water Concentration ◽  
Thermal Storage ◽  
Ammonia Vapor ◽  
Peak Period ◽  
Ammonia Water ◽  
Absorption Refrigeration System

An analysis of a low-temperature thermal storage system using an ammonia-water solution both as a refrigerant and as a low-temperature thermal storage material is considered. The thermal storage is useable at a temperature of −27°C and higher. The proposed system is designed to shift electric demand from high to low-demand periods. The system utilizes a heat-operated absorption refrigeration system; however, the generator heat is supplied by a self-contained vapor compression heat pump. The heat pump is operated during the off-peak period to recover the low-temperature thermal storage by reprocessing the stored ammonia-water solution to a lower ammonia-water concentration. The ammonia vapor liberated from solution in the dephlegmator is used in the compressor to produce the generator heat. Three different configurations are considered, including a solar-assisted system. The results are compared to an eutectic salt storage system.

Evaluation of the environmental sustainability of a micro CHP system fueled by low-temperature geothermal and solar energy

2014 ◽  
Vol 78 ◽  
pp. 611-616 ◽  
Author(s):  
Franco Ruzzenenti ◽  
Mirko Bravi ◽  
Duccio Tempesti ◽  
Enrica Salvatici ◽  
Giampaolo Manfrida ◽  
...  
Keyword(s):  
Low Temperature ◽  
Solar Energy ◽  
Environmental Sustainability ◽  
Chp System

Characteristics of an Ammonia-Water Mixture Turbine System with Low Temperature Heat Source

2004 ◽  
Vol 2004.3 (0) ◽  
pp. 277-278
Author(s):  
Keisuke TAKESHITA ◽  
Koji MORIMOTO ◽  
Yoshiharu AMANO ◽  
Takumi HASHIZUME
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Water Mixture ◽  
Ammonia Water ◽  
Temperature Heat

Thermodynamic Performance Analysis of Ammonia-Water Rankine Cycles Using Heat Sources of High and Low Temperatures

2012 ◽  
Vol 249-250 ◽  
pp. 278-283
Author(s):  
Kyoung Hoon Kim ◽  
Hyung Jong Ko ◽  
Se Woong Kim
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Thermal Efficiency ◽  
Low Temperatures ◽  
Ammonia Concentration ◽  
Working Fluid ◽  
Heat Sources ◽  
Ammonia Water ◽  
High And Low Temperatures ◽  
System Variables

In this study, thermodynamic performances of ammonia-water Rankine (AWR) cycle and regenerative Rankine (AWRR) cycle are comparatively investigated. Special attention is focused on the effects of ammonia concentration and turbine inlet pressure on the performance of system using heat sources of high temperature of 300 oC and low temperature of 150 oC. The behavior of important system variables including mass flow ratio of working fluid, net work production, and thermal efficiency are closely examined. Results show that performance characteristics for heat sources of high and low temperatures are quite different each other. For the high-temperature source, the thermal efficiency has a minimum in AWR system while it has a maximum in AWRR with respect to ammonia concentration in the range of 65% to 75%. For low-temperature source, however, the thermal efficiency decreases with ammonia concentration in the range of ammonia concentration higher than 95% for both AWR system and AWRR system and the effect of regenerator is negligible.

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