Economic Analysis of the Absorption Heat Pump in Supercritical Unit

2013 ◽  
Vol 291-294 ◽  
pp. 1666-1669
Author(s):  
Yun Li ◽  
Kai Song
Keyword(s):  
Low Temperature ◽  
Heat Pump ◽  
Power Plants ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Environmental Benefits ◽  
Absorption Heat Pump ◽  
Practical Applications ◽  
Circulating Water ◽  
Central Heating

As an effective energy-saving device, the heat pump is environmentally friendly and advantageous in the recovery of low-temperature and middle-temperature waste heat. So it is increasingly being used in practical applications. The circulating water which is produced by power plants has a large number of low-temperature waste heat. It will bring huge economic and environmental benefits by using heat pump technology to recover those waste heat energy. The application of the heat pump in supercritical unit is discussed as the example of central heating project using waste heat in a power plant. And the basic principle of absorption heat pump is introduced. The economy, energy conservation and environmental benefits of lithium bromide absorption heat pump are also analyzed when it is used in 600MW supercritical unit.

Study on the Comprehensive Program of Heat Pump Technology Recycling Thermal Power Plants Circulating Water Heat

2013 ◽  
Vol 313-314 ◽  
pp. 759-762
Author(s):  
Yun Feng Ma ◽  
Yan Xiang Liu ◽  
Tao Ji
Keyword(s):  
Heat Pump ◽  
Power Plants ◽  
Waste Heat ◽  
Thermal Power ◽  
Heating System ◽  
Hot Water ◽  
Thermal Power Plants ◽  
Domestic Hot Water ◽  
Circulating Water ◽  
Central Heating

In order to fully recycle power plant’s circulatingwater heat, improve the thermal efficiency and protect the environment, thispaper designs the comprehensive scheme of heat pumptechnology recycling power plant’s circulating water heat, including theboiler mae-up water pre-heating system, the central heating circulatingsystem and the domestic hot water circulating system, which not only run at thesame time but also function independently. Even in non-heating seasons,the waste heat of circulating water can be utilized fully. It is worthmentioning that this paper puts forward to install climate compensationdevice in the central heating system, which can perform intelligent district timesharing control to meet different users’ needs.

Modelling and performance analysis of a single stage open absorption heat pump system in aspen plus using aqueous LiBr and HCOOK: A waste moist heat recovery application

2021 ◽  
pp. 095765092110478
Author(s):  
Muhammad Kashif Shahzad ◽  
Yaqi Ding ◽  
Yongmei Xuan ◽  
Neng Gao ◽  
Guangming Chen
Keyword(s):  
Heat Pump ◽  
Heat Recovery ◽  
Process Model ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Aspen Plus ◽  
Coefficient Of Performance ◽  
Water Recovery ◽  
Pump System ◽  
Absorption Heat Pump

Open absorption heat pump (OAHP) system is more viable option to recover waste heat from moist gas as compared to the traditional condensation methods. This promising technology has great potential for latent heat recovery from moist gas, drying process in paper and other industrial heating applications. This study presents the process modelling and comparative analysis of OAHP system in Aspen Plus using two different solutions by adopting part regeneration technique. The promising potassium formate-water (HCOOK/H2O) which has lower causticity, lower costs and better crystallization characteristics is used as an alternative to the caustic lithium bromide-water (LiBr/H2O) solution in this study. Process model of the system is established in Aspen Plus and, the properties validity is confirmed with published experimental and Engineering Equation Solver (EES) library data. A detailed comparative parametric study is carried out to evaluate the effect of influencing parameters on coefficient of performance (COP), water recovery (φ) and heat recovery (ζ) efficiencies. The performance of OAHP system is found to be very similar using different concentrations as 2.13 COP value for 50% LiBr/H2O and 2.19 for 70% HCOOK/H2O solution over design conditions. Similarly, φ is found to be 0.701, 0.688 while ζ as 0.716 and 0.705 for both the absorbents. Moreover, the system’s operational concentration range is 45-61.3% for LiBr/H2O and 55-82.1% for HCOOK/H2O at 135 °C regeneration heat input. Potassium formate solution having quite similar properties to the aqueous lithium bromide is also confirmed to have similar performance trends using 50% and 70% concentrations.

Analysis on Circulating Water Heat Utilization Technology in Thermal Power Plants

2013 ◽  
Vol 753-755 ◽  
pp. 2727-2730
Author(s):  
Jian Tao Liu ◽  
Xiao Cheng Ma ◽  
Kun Kun You ◽  
Jian Xing Ren ◽  
Yong Wen Yang
Keyword(s):  
Power Unit ◽  
Heat Pump ◽  
Power Plants ◽  
Waste Heat ◽  
Thermal Power ◽  
Water System ◽  
Water Source ◽  
Circulating Water ◽  
Heat Utilization ◽  
Circulating Water System

The thermal power unit is the major unit in Chinas power supply. Circulating water has large low-temperature waste-heat which can be recycled. The principles of water source heat pump technology is analyzed, characteristic of circulating water system in thermal power unit is studied. Then two kinds of connection methods between circulating water system and water source heat pump (WSHP) are presented.

The Study of Cooling Water Waste Heat Recovery in Chemical Plant by Heat Pump System

2010 ◽  
Vol 121-122 ◽  
pp. 986-991
Author(s):  
Jing Gang Wang ◽  
Xiao Xia Gao ◽  
Bo Liang ◽  
Hua Hui Zhou
Keyword(s):  
Heat Pump ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Cooling Water ◽  
Water Source ◽  
Chemical Plant ◽  
Pump System ◽  
Absorption Heat Pump ◽  
Heat Pump System ◽  
Water Waste

A large number of cooling water exists in chemical plant, use water source heat pump and lithium bromide absorption heat pump system to achieve water cooling instead of cooling tower, at the same time, extract heat for building cooling and heating. Respectively introduced the summer cooling system and winter heating system, and a feasibility analysis was carried out. The conclusion is get: water source heat pump system and lithium bromide absorption heat pump system for cooling water waste heat recovery is certain feasibility; the environment optimization can be achieved in chemical plant, at the same time, energy conservation and emission reduction is realized.

Influence of Temperature Parameter Change on Lithium Bromide Absorption Heat Pump Performance

2013 ◽  
Vol 291-294 ◽  
pp. 1670-1674
Author(s):  
Biao Li ◽  
Jiang Fan
Keyword(s):  
Power Plant ◽  
Heat Pump ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Optimal Operation ◽  
Pump System ◽  
Absorption Heat Pump ◽  
Heat Pump System ◽  
Heat Pump Unit ◽  
The Impact

It is the new way of the thermal power plant energy conservation to recycling plant circulating water waste heat for heating with the heat pump technology. The recovery of low temperature waste heat is the background. And lithium bromide absorption heat pump is the object of this study. The impact of changes in temperature parameters on the performance of heat pump unit is analyzed. As a theoretical basis for the design of the heat pump system and power plant heat pump unit’s optimal operation provide a reference. The result provides a theoretical reference for the optimal operation of the heat pump system design and power plant heat pump units.

Thermodynamic Performance Analysis of a New CHP System With Absorption Heat Pump in a Direct Air Cooling Power Plant

2015 ◽  
Author(s):  
Hongsheng Zhang ◽  
Hongbin Zhao ◽  
Zhenlin Li
Keyword(s):  
Heat Pump ◽  
Power Plants ◽  
Waste Heat ◽  
Integrated System ◽  
Exergy Loss ◽  
Conventional Heating ◽  
Design Parameters ◽  
Air Cooling ◽  
Absorption Heat Pump ◽  
Energy And Exergy

A new waste heat recovery scheme based on absorption heat pumps (AHP) applied in CHP (Combined Heat and Power) system was proposed to decrease heating energy consumption of existing CHP systems by recovering waste heat of exhausted steam from a steam turbine of coal-fired direct air cooling units. Based on the establishment of thermodynamic analysis model, through adopting the design parameters of the 135 MW direct air-cooled power plants in China, the performances, especially the exergy losses of the unit as well as its subsystems mainly including six parts at different heating modes were obtained at one specific load. Compared with conventional heating mode, when the thermoelectric ratio is 100%, the power output increases around 3.81 MW, coal consumption rate decreases 11.69 g/(kW·h) and total exergy loss decreases 6.892 MW under 100% THA load, while the energy and exergy efficiencies of the integrated system increase 1.29 % and 1.25 %, respectively. Additionally, the change laws of total exergy loss, energy and exergy efficiency of integrated system at different loads also were studied. The results provide not only theory basis and scientific support for the design of the coal-fired power plants with absorption heat pump recovering waste heat, but also a new scheme of energy saving and optimization for the units.

S0830202 Investigation of Absorption Heat Pump Cycle Driven by Low Temperature Waste Heat

2015 ◽  
Vol 2015 (0) ◽  
pp. _S0830202--_S0830202-
Author(s):  
Haruka MATSUMOTO ◽  
Tatsuya HYODO ◽  
Yoshiharu AMANO
Keyword(s):  
Low Temperature ◽  
Heat Pump ◽  
Waste Heat ◽  
Absorption Heat Pump

Lithium Bromide/Water Absorption Heat Pump for Simultaneous Production of Heated Air and Steam from Waste Heat

2016 ◽  
Vol 49 (3) ◽  
pp. 268-273 ◽  
Author(s):  
Kenji Marumo ◽  
Nobusuke Kobayashi ◽  
Tsuguhiko Nakagawa ◽  
Jun Fukai ◽  
Yoshinori Itaya
Keyword(s):  
Water Absorption ◽  
Heat Pump ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Absorption Heat Pump ◽  
Simultaneous Production ◽  
Heated Air
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