Performance and Benefits Evaluation of Two Water-Source Heat Pump Systems for District Heating

2012 ◽  
Vol 204-208 ◽  
pp. 4225-4228
Author(s):  
Xiao Chen ◽  
Jie Han ◽  
Jing Zeng
Keyword(s):  
Heat Pump ◽  
System Performance ◽  
Energy Savings ◽  
District Heating ◽  
Water Source ◽  
Primary Energy ◽  
Test Results ◽  
Actual Performance ◽  
Heating Source ◽  
Groundwater Heat Pump

The heating source of a district heating (DH) system in Beijing was reformed from coal boilers to a groundwater heat pump (GWHP) system and a sewage source heat pump (SSHP) system. This study aims to evaluate the actual performance and benefits of two water-source heat pump systems. We found total energy savings and primary energy saving rate due to the retrofit to be 950 tons of standard coal equivalent (TCE) every year and 34.6%, respectively. Field test results indicated the necessity of system performance improvement. Appropriate approaches to improve the system performance were discussed.

scholarly journals Impact of district heating and groundwater heat pump systems on the primary energy needs in urban areas

2012 ◽  
Vol 40 ◽  
pp. 18-26 ◽  
Author(s):  
Vittorio Verda ◽  
Giorgia Baccino ◽  
Adriano Sciacovelli ◽  
Stefano Lo Russo
Keyword(s):  
Heat Pump ◽  
Urban Areas ◽  
District Heating ◽  
Primary Energy ◽  
Energy Needs ◽  
Groundwater Heat Pump

Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant

2012 ◽  
Vol 9 (2) ◽  
pp. 65
Author(s):  
Alhassan Salami Tijani ◽  
Nazri Mohammed ◽  
Werner Witt
Keyword(s):  
Energy Consumption ◽  
Power Plant ◽  
Heat Pump ◽  
Heat Recovery ◽  
Energy Savings ◽  
Primary Energy ◽  
Heat Pumps ◽  
Saturated Steam ◽  
Distillation Unit ◽  
Primary Energy Consumption

Industrial heat pumps are heat-recovery systems that allow the temperature ofwaste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses ofintegrating backpressure turbine ofa power plant with distillation units have been considered. Some practical examples such as conventional distillation unit and heat pump are used as a means of reducing primary energy consumption with tangible indications of energy savings. The heat pump distillation is operated via electrical power from the power plant. The exergy efficiency ofthe primary fuel is calculated for different operating range ofthe heat pump distillation. This is then compared with a conventional distillation unit that depends on saturated steam from a power plant as the source of energy. The results obtained show that heat pump distillation is an economic way to save energy if the temperaturedifference between the overhead and the bottom is small. Based on the result, the energy saved by the application of a heat pump distillation is improved compared to conventional distillation unit.

Reduction of primary energy needs in urban areas trough optimal planning of district heating and heat pump installations

Energy ◽  
2012 ◽  
Vol 48 (1) ◽  
pp. 40-46 ◽  
Author(s):  
Vittorio Verda ◽  
Elisa Guelpa ◽  
Albana Kona ◽  
Stefano Lo Russo
Keyword(s):  
Heat Pump ◽  
Urban Areas ◽  
District Heating ◽  
Primary Energy ◽  
Optimal Planning ◽  
Energy Needs

scholarly journals An experimental study of the effect of water bodies temperature on water heat pump performance

2018 ◽  
Vol 194 ◽  
pp. 01050 ◽  
Author(s):  
Amer Saloum ◽  
Vyacheslav I. Maksimov
Keyword(s):  
Heat Pump ◽  
System Performance ◽  
Formation Rate ◽  
Water Source ◽  
Ice Formation ◽  
Pump Performance ◽  
Effect Of Water ◽  
Pump Station ◽  
Negative Effect ◽  
Heat Exchange Efficiency

The purpose of this research is to study the effect of water temperature change in the reservoir on water heat pump performance. An experimental analyse is done on the heat pump station which depends on water as a heat source. The experimental results confirm that the ice formation has a negative effect on the heat exchange efficiency, and the increase in water source temperature slow down the ice formation rate which causes an appositive effect on the system performance.

Design and Operation Prediction of Groundwater Heat Pump

2012 ◽  
Vol 608-609 ◽  
pp. 983-986
Author(s):  
Xiao Qiong Deng
Keyword(s):  
Heat Pump ◽  
Large Scale ◽  
Water Source ◽  
Temperature Changes ◽  
Average Temperature ◽  
Hydrogeological Parameters ◽  
Groundwater Heat Pump ◽  
Thermal Breakthrough ◽  
Building Load ◽  
Interference Problems

This article based on a large-scale water source heat pump engineering in a city of China, according to the experiment and survey of pumping site as well as hydrogeological parameters combined with the building load requirements, the design scheme of cluster wells pumping and injection was given. A numerical simulation was also done in order to analyze and forecast the temperature changes in aquifer and thermal breakthrough, well group interference problems for the next 3 years. Moreover an experience equation about change of average temperature of water source heat pump wells was got which will provide reference for design and operation of GWHP for others.

scholarly journals Primary energy savings using heat storage for biomass heating systems

2012 ◽  
Vol 16 (suppl. 2) ◽  
pp. 423-431 ◽  
Author(s):  
Dejan Mitrovic ◽  
Jelena Janevski ◽  
Mirjana Lakovic
Keyword(s):  
Heat Load ◽  
Energy Savings ◽  
Heat Storage ◽  
District Heating ◽  
Primary Energy ◽  
Water Tank ◽  
Storage Unit ◽  
Heating Systems ◽  
Heating Efficiency ◽  
Storage Volume

District heating is an efficient way to provide heat to residential, tertiary and industrial users. The heat storage unit is an insulated water tank that absorbs surplus heat from the boiler. The stored heat in the heat storage unit makes it possible to heat even when the boiler is not working, thus increasing the heating efficiency. In order to save primary energy (fuel), the boiler operates on nominal load every time it is in operation (for the purpose of this research). The aim of this paper is to analyze the water temperature variation in the heat storage, depending on the heat load and the heat storage volume. Heat load is calculated for three reference days, with average daily temperatures from -5 to 5?C. The primary energy savings are also calculated for those days in the case of using heat storage in district heating.

scholarly journals The effect of the District Heating Return Temperature Reduction on Flue Gas Condenser Efficiency

2020 ◽  
Vol 24 (3) ◽  
pp. 23-38
Author(s):  
Kertu Lepiksaar ◽  
Anna Volkova ◽  
Pavel Ruseljuk ◽  
Andres Siirde
Keyword(s):  
Flue Gas ◽  
Heat Recovery ◽  
Energy Savings ◽  
District Heating ◽  
Primary Energy ◽  
Calculation Model ◽  
Fuel Moisture ◽  
Temperature Reduction ◽  
Boiler Efficiency ◽  
Heating Networks

AbstractThe use of flue gas condensers proved to be effective in increasing boiler efficiency and achieving primary energy savings. The transition to the 4th generation district heating will lead to temperature reduction in district heating networks. The aim of this study is to determine the effects of the reduction in the district heating return temperature on flue gas condenser efficiency. Different DH return temperatures and fuel moisture contents were examined, and a calculation model was created. The results show that a reduction in district heating return temperature can lead to an increase in heat recovery through the flue gas condenser. Primary energy savings were estimated based on the amount of heat recovered.

Evaluation and optimization of water source heat pump for district heating: A case study in steel plant

2019 ◽  
Vol 44 (12) ◽  
pp. 9399-9413
Author(s):  
Lianying Zhang ◽  
Min Zhou ◽  
Chunfang Yang ◽  
Yuefei Li ◽  
Zhibo Fu ◽  
...  
Keyword(s):  
Heat Pump ◽  
District Heating ◽  
Water Source ◽  
Steel Plant

Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant

2012 ◽  
Vol 9 (2) ◽  
pp. 65
Author(s):  
Alhassan Salami Tijani ◽  
Nazri Mohammed ◽  
Werner Witt
Keyword(s):  
Energy Consumption ◽  
Power Plant ◽  
Heat Pump ◽  
Heat Recovery ◽  
Energy Savings ◽  
Primary Energy ◽  
Heat Pumps ◽  
Saturated Steam ◽  
Distillation Unit ◽  
Primary Energy Consumption

Industrial heat pumps are heat-recovery systems that allow the temperature of waste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses of integrating backpressure turbine of a power plant with distillation units have been considered. Some practical examples such as conventional distillation unit and heat pump are used as a means of reducing primary energy consumption with tangible indications of energy savings. The heat pump distillation is operated via electrical power from the power plant. The exergy efficiency of the primary fuel is calculated for different operating range of the heat pump distillation. This is then compared with a conventional distillation unit that depends on saturated steam from a power plant as the source of energy. The results obtained show that heat pump distillation is an economic way to save energy if the temperature difference between the overhead and the bottom is small. Based on the result, the energy saved by the application of a heat pump distillation is improved compared to conventional distillation unit. 

Sign in / Sign up

Export Citation Format

Share Document