Study of Energy-Saving Characteristics of Propylene-Propane Mixtures in the Heat Pump Distillation Column

2011 ◽  
Vol 236-238 ◽  
pp. 1313-1316
Author(s):  
Zheng Ming Tong ◽  
Chao Li ◽  
Jia Lei Lu ◽  
Kai Zhu
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Distillation Column ◽  
Energy Savings ◽  
Operating Conditions ◽  
Material System ◽  
Saving Rate ◽  
Energy Consuming ◽  
Static Simulation ◽  
Energy Shortage

The largest proportion of energy consuming is the operations of separation in chemical industry, and the energy consumption of the distillation is the highest in separation. Therefore, it is very important to research energy-saving issues of the process of distillation in today's circumstances of the energy shortage. This article describes the model of the heat pump distillation column,and its characteristics, uses static simulation programs to simulate operating conditions in the same pressure for the propylene-propane material system, and studys effects of the different feed states on the energy-saving of heat pump distillation column. The results will be compared with the conventional distillation column, and it was showed that for propylene-propane system, the heat pump distillation column is more remarkable than the conventional distillation column in energy savings, and its energy saving rate can reach 56%.

Energy-Saving Characteristics of Benzene-Toluene Mixtures in Heat Pump Distillation Column

2012 ◽  
Vol 455-456 ◽  
pp. 630-634
Author(s):  
Zheng Ming Tong ◽  
Chao Li ◽  
Jia Lei Lu ◽  
Kai Zhu
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Distillation Column ◽  
Energy Savings ◽  
Operating Conditions ◽  
Material System ◽  
Industrial Energy ◽  
Energy Consuming ◽  
Benzene Toluene ◽  
Consuming Country

China is a big industrial energy consuming country. The largest proportion of energy consuming is the operations of separation in chemical industry, and the energy consumption of the distillation is the highest in separation. Therefore, it is very important to research energy-saving issues of the process of distillation in today's circumstances of the energy shortage. This article describes the model of heat pump distillation column,and its characteristics, uses static simulation programs to simulate operating conditions in the atmospheric pressure for the benzene-toluene material system, and studys effects of the different feed states on the energy-saving of heat pump distillation column. The results will be compared with the conventional distillation column, and it was showed that for benzene-toluene system, the heat pump distillation column is more remarkable than the conventional distillation column in energy savings, and its energy saving rate can reach 46%.

Energy Saving in a Heat Pump Air-Conditioning System Using Liquid Desiccant and Membrane Contactors

2011 ◽  
Author(s):  
Stefano Bergero ◽  
Anna Chiari
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Hybrid System ◽  
Air Conditioning ◽  
Energy Savings ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Membrane Contactor ◽  
Traditional System ◽  
Vapour Compression

It has been demonstrated in the literature that significant energy savings can be achieved in air-conditioning through the use of so-called hybrid systems, in which a chemical dehumidification system is combined with a vapour-compression heat pump. The advantage of such systems lies in the fact that the heat pump can operate at a higher evaporation temperature than that of a traditional system in which dehumidification is achieved through condensation, thereby achieving higher coefficients of performance. The hybrid system described in the present paper operates as follows: the air supplied to the conditioned ambient is simultaneously cooled and dehumidified in an air-solution membrane contactor. The LiCl solution is cooled by means of a vapour-compression heat pump using the refrigerant KLEA 410A. The solution is regenerated in another membrane contactor by exploiting the exhaust air and the heat rejected by the condenser. A study of the steady-state behaviour of the system in summer climatic conditions was carried out, on varying some significant operating parameters, such as the thermal efficiency of the heat exchangers, the outdoor temperature and the sensible load of the conditioned room. The performances of the hybrid system were compared with those of a traditional direct-expansion air-conditioning plant; the results of the simulations reveal that, in particular operating conditions, energy saving can exceed 50%.

Study on the Condition and Existing Problems of Building Energy Saving in Anhui

2012 ◽  
Vol 598 ◽  
pp. 114-117
Author(s):  
Yuan Hao Wang ◽  
Bao Zhu Sheng
Keyword(s):  
Energy Saving ◽  
20Th Century ◽  
Building Energy ◽  
Energy Resources ◽  
Existing Problems ◽  
The Status ◽  
Energy Consuming ◽  
Building Energy Saving ◽  
Oil Crisis ◽  
Energy Shortage

Since the oil crisis in the early 70,s of the 20th century,the problem of energy shortage had drawn worldwide attention.Energy saving is now regarded as the 5th“energy resources,besides coal,petroleum,natural gas,and nuelear power.And energy saving of buildings especially cutting down the daily operating energy consuming is given the greatest importance by many countries. Analys is the status of building energy saving in Anhui Provice, and analys is key problems of building energy saving in Anhui Provice,which aims to find out a suitable way for Anhui’s energy saving of buildings.

scholarly journals COMPARISON OF ENERGY SAVING METHODS FOR DISTILLATION OF LIQUID MIXTURES

2020 ◽  
Vol 64 (1) ◽  
pp. 85-92
Author(s):  
Mikhail K. Zakharov ◽  
Yuri A. Pisarenko ◽  
Oksana I. Sycheva
Keyword(s):  
Energy Saving ◽  
Internal Energy ◽  
Heat Pump ◽  
Distillation Column ◽  
Scientific Literature ◽  
Heat Removal ◽  
Heat Consumption ◽  
Heat Integration ◽  
Additional Increase ◽  
Internal Energy Saving

The analysis and review of the scientific literature on methods and approaches to energy saving in distillation, as one of the most energy-intensive processes for the separation of binary and multicomponent mixtures was carried out. Directions of the scientific literature are highlighted, showing the relevance of the thermodynamic method assessment of separation processes. A comparative analysis of various methods of energy conservation in the separation of liquid binary mixtures by the distillation method is performed (a binary mixture of benzene-toluene was chosen as an example). A conventional distillation column as well as a column with a heat pump and a column with heat integration were considered. As a result of the calculation experiment for each option performed using the Aspen Plus software package the optimal column parameters were determined - the total number of stages and the position of feed stage. The heat consumption in the column boiler was taken as the objective function. It is also shown that with the same characteristics of the columns, the best way to organize the process for separating the selected mixture is to compress the steam stream from rectifying profile of the column with its subsequent use in the boiler of the stripping profile according to the principle of a heat pump. It was established by a calculation experiment that heat integration by compressing steam from rectifying profile of the column and supplying it to the stripping profile gives significantly less energy saving. The calculation of internal energy saving by distillation column was carried out and it was shown that the distributed heat removal from the plates of the rectifying profile of the column and the supply of this heat to the stripping profile plates reduces internal energy saving and leads to an additional increase in heat consumption in the boiler.

Energy-Saving Characteristics of Benzene-Toluene Mixtures in Heat Pump Distillation Column

2012 ◽  
Vol 455-456 ◽  
pp. 630-634
Author(s):  
Zheng Ming Tong ◽  
Chao Li ◽  
Jia Lei Lu ◽  
Kai Zhu
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Distillation Column ◽  
Benzene Toluene

The Energy, Environmental and Economic Benefits Analysis of Ground-Source Heat Pump in Wuhan Region of Summer Condition

2012 ◽  
Vol 253-255 ◽  
pp. 701-704 ◽  
Author(s):  
Yong Ma ◽  
Yu Yun Li ◽  
You Cai Ma ◽  
Xian Fang Hu ◽  
Gui Hua Hu
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Economic Benefits ◽  
Payback Period ◽  
Saving Rate ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Total Load ◽  
Actual Performance ◽  
Ground Source

To study the actual energy-saving rate of a ground-source heat pump system (GSHP), this article discusses the actual performance coefficient of cooling condition. Compared with the conventional water-cooled chillers and conventional coal-fired boiler, there comes to conclusions that the actual average energy-saving rate is 43.9%, which is lower than the calculated , and the energy saving rate of heating conditions is 11.8% higher than that of cooling conditions. What’s more, we come to conclusion that the actual total load is one-third to two-thirds of the calculated total load, resulting that the actual payback period is 98.6% longer than the calculated payback period.

Analysis of Energy and Environmental Benefits about Ground-Source Heat Pump under Heating Conditions in Wuhan Region

2012 ◽  
Vol 608-609 ◽  
pp. 974-978
Author(s):  
Xian Fang Hu ◽  
Yu Yun Li ◽  
Yong Ma ◽  
Gui Hua Hu ◽  
Qian Tang
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Payback Period ◽  
Environmental Benefits ◽  
Saving Rate ◽  
Ground Source Heat Pump ◽  
Heating Season ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

Based on the heating season testing of ground-source heat pump system (GSHP) in Wuhan, the article discussed the energy efficiency ratio of ground-source heat pump system under the heating conditions. By comparison with conventional chillers & coal-fired boiler system, the system energy savings, environmental benefits and incremental payback period are analysized. There comes to the conclusion that the energy saving rate of the heating season is about 19.74% higher than that of the cooling season, reducing 18.35 kg carbon dioxide emissions, 0.15kg of sulfur dioxide and 0.0743 kg of dust per unit construction area each year. Also this article concludes the annual energy saving rate of ground-source heat pump system equals to that of water-source heat pump, with the payback period 22% longer and the cost-effective ratio 32% higher.

scholarly journals Risk Mitigation in Energy Efficiency Retrofit Projects Using Automated Performance Control

2021 ◽  
Author(s):  
Job Taminiau ◽  
John Byrne ◽  
Daniel Sanchez Carretero ◽  
Soojin Shin ◽  
Jing Xu
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Energy Savings ◽  
Risk Mitigation ◽  
Building Energy Efficiency ◽  
Performance Control ◽  
Performance Guarantees ◽  
Performance Risk ◽  
Energy Consuming ◽  
And Control

Performance gap concerns limit investment in the building energy efficiency retrofit market. In particular, the ability of projects to deliver on promised energy savings is commonly drawn into question. Performance risk mitigation mainly occurs through energy saving performance guarantees. Contractual stipulations arrange the conditions of the guarantee, and ceteris paribus, a higher energy saving guarantee should reduce project performance risk. Therefore, methods that yield a higher energy saving guarantee could help accelerate the market. We review the ability of “smart,” automated, and connected technologies to: (a) intelligently monitor and control the performance of energy-consuming devices to reduce performance variations, (b) provide additional degrees of control over the project’s performance, and, by doing so, (c) motivate the energy services company (ESCO) to raise the energy saving guarantee. Our analysis finds that use of such automated performance control could significantly raise the energy saving guarantee, making projects more likely to succeed.

Analysis of Energy Efficiency of Solar Energy/Air Source Compound Heat Pump System under Heating Condition

2011 ◽  
Vol 130-134 ◽  
pp. 1609-1612
Author(s):  
Bo Bo Hou ◽  
Zhi Gang Zhang ◽  
Wei Zhang
Keyword(s):  
Energy Efficiency ◽  
Data Analysis ◽  
Solar Energy ◽  
Energy Saving ◽  
Heat Pump ◽  
Saving Rate ◽  
Heating Condition ◽  
Efficiency Ratio ◽  
Pump System ◽  
Heat Pump System

Based on the test data analysis and processing which are acquired from a solar energy/air source compound heat pump system in the actual building, the seasonal energy efficiency ratio under the two modes and the energy-saving rate are obtained. Through the analysis of the energy-saving rate, the energy-saving characteristics of the solar energy/air source compound heat pump system under heating condition is discussed in detailed.

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