A water-ammonia heat transformer to upgrade low-temperature waste heat

Abstract A prototype water-ammonia absorption heat transformer has been built and thoroughly tested. Compared to water-salts mixtures, water-ammonia allows operating the machine in a lower temperature range, fostering recover of low-grade heat. Driving temperatures between 60 °C and 64 °C were tested, with condenser temperatures of 8–16 °C. The unit proved able to operate in a stable, reliable and repeatable way in this working range, achieving gross temperature lifts up to 25 °C and thermal COPs in the range 0.400–0.475. Useful effect up to 4.5 kW was achieved, with electric consumption always below 100 W.

[1]  Zongchang Zhao,et al.  Thermodynamic performance of a double-effect absorption heat-transformer using TFE/E181 as the working fluid , 2005 .

[2]  M.A.R. Eisa,et al.  Thermodynamic design data for absorption heat transformers—III. Operating on ammonia-water , 1987 .

[3]  Felix Ziegler,et al.  Recent developments and future prospects of sorption heat pump systems , 1999 .

[4]  Rosenberg J. Romero,et al.  Experimental thermodynamic evaluation for a single stage heat transformer prototype build with commercial PHEs , 2015 .

[5]  Rosenberg J. Romero,et al.  Exergy analysis of an experimental single-stage heat transformer operating with single water/lithium bromide and using additives (1-octanol and 2-ethyl-1-hexanol) , 2011 .

[6]  Hao Liu,et al.  Performance analysis of regenerative organic Rankine cycle (RORC) using the pure working fluid and the zeotropic mixture over the whole operating range of a diesel engine , 2014 .

[7]  Mortaza Yari,et al.  Absorption heat transformers – A comprehensive review , 2014 .

[8]  Brian Elmegaard,et al.  Lowering district heating temperatures – Impact to system performance in current and future Danish energy scenarios , 2016 .

[9]  Alberto Coronas,et al.  Purification of seawater using absorption heat transformers with water-(LiBr+LiI+LiNO3+LiCl) and low temperature heat sources , 2004 .

[10]  Edmond P. Byrne,et al.  Recycling waste heat energy using vapour absorption heat transformers: A review , 2015 .

[11]  Jiabin Chen,et al.  Application of absorption heat transformer to recover waste heat from a synthetic rubber plant , 2003 .

[12]  Rosenberg J. Romero,et al.  A review of absorption heat transformers , 2015 .

[13]  Ch Mostofizadeh,et al.  Use of a new type of heat transformer in process industry , 1998 .

[14]  Vincent Lemort,et al.  Techno-economic survey of Organic Rankine Cycle (ORC) systems , 2013 .

[15]  Clemens Forman,et al.  Estimating the global waste heat potential , 2016 .

[16]  Edmond P. Byrne,et al.  Internal energy and exergy recovery in high temperature application absorption heat transformers , 2013 .

[17]  Sven Werner,et al.  Achieving low return temperatures from district heating substations , 2014 .

[18]  Erasmo Cadenas,et al.  Exergy analysis of an experimental heat transformer for water purification , 2011 .

[19]  Roberto Best,et al.  Thermodynamic design data for absorption heat transformers. Part six: Operating on water-carrol , 1994 .

[20]  Reinhard Radermacher,et al.  Absorption Chillers and Heat Pumps , 1996 .

[21]  F. A. Holland,et al.  Experimental performance of the water/calcium chloride system in a heat transformer , 1996 .

[22]  Luisa F. Cabeza,et al.  Industrial waste heat recovery technologies: An economic analysis of heat transformation technologies , 2015 .

[23]  I. Horuz,et al.  A comparison between ammonia-water and water-lithium bromide solutions in absorption heat transformers , 2001 .

[24]  Jesús Cerezo,et al.  First double stage heat transformer (DSHT) in latinamerica , 2010 .

[25]  Rajagopal Saravanan,et al.  Experimental studies on absorption heat transformer coupled distillation system , 2011 .

[26]  D. Hebecker,et al.  Dynamics of a heat transformer working with the mixture NaOHH2O , 1997 .

[27]  K. Abrahamsson,et al.  Design and experimental performance evaluation of an absorption heat transformer with self-circulation , 1995 .

[28]  Hongguang Jin,et al.  Experimental studies on a direct-steam-generation absorption heat transformer built with vertical falling-film heat exchangers , 2017 .