Analysis on Energy Efficiency and Pollutant Reductions of Direct Sewage Source Heat Pump System

2010 ◽  
Author(s):  
Qian Jianfeng
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Sewage Source

scholarly journals Field Test on Performance of an Air Source Heat Pump System Using Novel Gravity-Driven Radiators as Indoor Heating Terminal

2021 ◽  
Vol 9 ◽  
Author(s):  
Jie Jia ◽  
Xuan Zhou ◽  
Wei Feng ◽  
Yuanda Cheng ◽  
Qi Tian ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Field Test ◽  
Thermal Response ◽  
Heat Output ◽  
Pump System ◽  
Heat Pump System ◽  
Air Source Heat Pump ◽  
Gravity Driven ◽  
Indoor Comfort

The simultaneous need for energy efficiency and indoor comfort may not be met by existing air source heat pump (ASHP) technology. The novelty of this study lies in the use of a new gravity-driven radiator as the indoor heating terminal of ASHPs, aiming to provide an acceptable indoor comfort with improved energy efficiency. To confirm and quantify the performance improvement due to the proposed system retrofit, a field test was conducted to examine the system performance under real conditions. In the tests, measurements were made on the refrigerant- and air-side of the system to characterize its operational characteristics. Results showed that the proposed radiator has a rapid thermal response, which ensures a fast heat output from the system. The proposed system can create a stable and uniform indoor environment with a measured air diffusion performance index of 80%. The energy efficiency of the proposed system was also assessed based on the test data. It was found that the system’s first law efficiency is 42.5% higher than the hydraulic-based ASHP system. In terms of the second law efficiency, the compressor contributes the most to the overall system exergy loss. The exergy efficiency of the proposed system increases with the outdoor temperature and varies between 35.02 and 38.93% in the test period. The research results and the analysis methodology reported in this study will be useful for promoting the technology in search of energy efficiency improvement in residential and commercial buildings.

Characteristics Study of Sewage Source Heat Pump System Based on Heat Transfer Enhancement and Acoustic Cavitation Decontamination

2014 ◽  
Vol 665 ◽  
pp. 607-610
Author(s):  
Jian Feng Qian ◽  
Ya Yuan Liu
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Heat Pump ◽  
Treatment Time ◽  
Acoustic Cavitation ◽  
Ultrasonic Cavitation ◽  
Transfer Enhancement ◽  
Pump System ◽  
Heat Pump System ◽  
Sewage Source

Put forward an application of ultrasonic cavitation technology of the sewage source heat pump system to solve the problem of controlling pollution and emphatically discusses the principle of acoustic cavitation and the effect, to conduct a feasibility analysis of Anti-fouling in sewage source heat pump sewage side. Through analysis principle of ultrasonic cavitation and heat transfer enhancement for carrying the experiment, study the pattern of scaling in heat exchange tube for different velocity and viscosity, effect in flow rate on the ultrasonic cleaning wastewater, Effect in ultrasonic treatment time on the descaling result. Obtain that it can enhancement transfer for 48%.

scholarly journals Field Test Analysis of a Urban Sewage Source Heat Pump System Performance

2017 ◽  
Vol 143 ◽  
pp. 131-136 ◽  
Author(s):  
Qunli Zhang ◽  
Zhiming Wang ◽  
Chaohui Yin ◽  
Qian Nie ◽  
Liwen Jin
Keyword(s):  
Heat Pump ◽  
Field Test ◽  
System Performance ◽  
Test Analysis ◽  
Pump System ◽  
Heat Pump System ◽  
Urban Sewage ◽  
Sewage Source

scholarly journals THE HEAT PUMP SYSTEM FOR VENTILATION AND AIR CONDITIONING INSIDE THE PRODUCTION AREA WITH AN EXCESSIVE INTERNAL MOISTURE GENERATION

2020 ◽  
Vol 17 (2) ◽  
pp. 78-86
Author(s):  
M.K. Bezrodny ◽  
Keyword(s):  
Energy Efficiency ◽  
Relative Humidity ◽  
Heat Pump ◽  
Air Conditioning ◽  
Warm Season ◽  
Pump System ◽  
Heat Pump System ◽  
Environment Temperature ◽  
Production Area ◽  
Continental Climate

The paper studies application feasibility and energy efficiency of the ventilation and air conditioning heat pump system for maintaining comfort conditions inside the production area with an excessive internal moisture generation during the warm season. In this regard, a thermodynamic analysis of a heat pump system with a partial exhaust air recirculation and a variable ratio of fresh outside air was carried out. Numerical analysis was then done to estimate the influence of changes in the environment temperature and relative humidity and the characteristics of the ventilation and air conditioning object on the system parameters. This allowed to determine potential capabilities of this system to maintain comfortable conditions in the production area. It was also shown that the required additional cooling of the supply air at the entrance to the premise for air conditioning demands can be determined by a simple coefficient and its calculation method is provided in the article. The heat pump system of temperature and humidity maintenance has the highest energy efficiency in the zone of relatively low environment temperatures and largely depends on the relative humidity of the outside air. This suggests that the studied system is suitable for application in countries with temperate continental climate.

scholarly journals Experimental Study on Automatic Switching of Solar Coupled Groundwater Source Heat Pump System

2021 ◽  
Vol 2095 (1) ◽  
pp. 012077
Author(s):  
Xiaoming Zhang ◽  
Qiang Wang ◽  
Qiujin Sun ◽  
Mingyu Shao
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Average Energy ◽  
Energy System ◽  
Hot Water ◽  
Efficiency Ratio ◽  
Pump System ◽  
Heat Pump System ◽  
Domestic Hot Water ◽  
Groundwater Source

Abstract There have been few practical applications of solar coupled groundwater source heat pump (GWHP) systems in large public buildings, and data on this technology are scarce. A solar coupled GWHP system was investigated in this study. The system uses an underground water source heat pump system for heating in winter, cooling in summer, and providing part of the domestic hot water, and it also uses a solar energy system to prepare domestic hot water. These two types of energy are complementary. The system was tested throughout the cooling season. This experiment ran from May 10, 2021, to September 10, 2021. The results show that the system can guarantee the indoor design temperature and the supply of domestic hot water. The solar water heating system operated for 1233 min in the summer; hot water (2334 m3) was prepared. During the summer, the average energy efficiency ratio of the GWHP unit was approximately 4.88. The energy efficiency ratio of the entire system was approximately 3.34. Such projects can play a key role in demonstrating this type of system.

Characteristics of Fouling in Urban Sewage Source Heat Pump System

2012 ◽  
Vol 446-449 ◽  
pp. 1502-1505
Author(s):  
Cheng Hu Zhang ◽  
Zhi Gang Yang ◽  
De Xing Sun
Keyword(s):  
Thermal Resistance ◽  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Urban Sewage ◽  
The Common ◽  
Sewage Source

Abstract—The article describes the growth and thermal resistance characteristics of the debris formation of the urban sewage source heat pump system, and describes the common measures.

A review of heat pump implementation specifics in residential sector energy efficiency

2020 ◽  
Vol 5 ◽  
pp. 24-27
Author(s):  
Anna Isanova ◽  
Galina Martynenko ◽  
Vladimir Lukyanenko ◽  
Elvira Semenova
Keyword(s):  
Energy Efficiency ◽  
Environmental Protection ◽  
Heat Pump ◽  
Review Paper ◽  
Broad Distribution ◽  
Pump System ◽  
Heat Pump System ◽  
Residential Sector ◽  
Evaporation Temperature ◽  
Computational Part

Heat pump systems become very promising equipment saving energy and improving overall energy efficiency and environmental protection in the residential sector. This review paper provides an update on current specifics of heat pump implementation in Russian residential sector. The paper also reviews major technical and supporting measures promoting broad distribution of the heat pump technology. In a computational part of this paper, heat pump refrigerant evaporation temperature and its influence on fuel consumption were analyzed for a heat pump system arrangement option with parallel evaporators.

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