Theoretical analyses of energy saving in a direct contact evaporative crystallization through the installation of heat pump

Desalination ◽  
2010 ◽  
Vol 251 (1-3) ◽  
pp. 47-52 ◽  
Author(s):  
Adnan M. Al-Harahsheh
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Direct Contact ◽  
Evaporative Crystallization ◽  
Theoretical Analyses

Research on Energy-Saving Technology for Salt Solution Heat Pump Evaporators

2013 ◽  
Vol 331 ◽  
pp. 216-221
Author(s):  
Tian Lan Yu ◽  
Tian Xiang Yu ◽  
De Qi Peng ◽  
Li Chen ◽  
Xiu Yan Feng ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Energy Saving ◽  
Heat Pump ◽  
Salt Solution ◽  
Pump Energy ◽  
Stable Operation ◽  
Falling Film ◽  
Film Evaporator ◽  
Evaporation Energy ◽  
Theoretical Analyses

Aiming at increasing the energy-saving efficiency of salt solution evaporation, the effect of several factors on heat pump energy-saving efficiency is studied through theoretical analyses and calculation. The factors include boiling point elevation caused by solution static pressure, superheat loss of surface evaporation, temperature difference loss caused by fouling. The conclusions are that falling-film evaporator helps improve heat pump evaporation energy-saving the most and forms the fluctuating flow of the falling film which can be used to remove fouling automatically. The Φ38mm×2mm single-tube dynamics experiment results show that the flow can produce stable 3D vibration of the cleaning spiral when the nominal flow velocity is more than 0.25m/s. The axial reciprocating motion distance is longer than one spiral pitch and reciprocating periodicity is 3-6 seconds. The sodium carbonate solution fouling removal experiment results show that the salt fouling decreases the overall heat transfer coefficient by 30% in one hour when there is no the 3D vibrating spiral-insert; and the insert can enhance heat transfer by 59% comparing to that during stable operation without this technology. Key Words: Falling-film Evaporator, Heat Pump Evaporate, Energy saving, Automatic cleaning, Heat transfer

Energy-saving analysis of air source heat pump integrated with a water storage tank for heating applications

2020 ◽  
Vol 180 ◽  
pp. 107029
Author(s):  
Pin Wu ◽  
Zhichao Wang ◽  
Xiaofeng Li ◽  
Zhaowei Xu ◽  
Yingxia Yang ◽  
...  
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Storage Tank ◽  
Water Storage ◽  
Water Storage Tank ◽  
Air Source Heat Pump

scholarly journals Energy Saving Potential of Radiant Floor Heating Assisted by an Air Source Heat Pump in Residential Buildings

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1321
Author(s):  
Yu-Jin Hwang ◽  
Jae-Weon Jeong
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Residential Buildings ◽  
Heating Systems ◽  
Air Source Heat Pump ◽  
Heating Capacity ◽  
Heating Loads ◽  
Radiant Floor Heating ◽  
Floor Heating ◽  
Floor Temperature

The objective of this research is to establish an appropriate operating strategy for a radiant floor heating system that additionally has an air source heat pump for providing convective air heating separately, leading to heating energy saving and thermal comfort in residential buildings. To determine the appropriate optimal operating ratio of each system taking charge of combined heating systems, the energy consumption of the entire system was drawn, and the adaptive floor surface temperature was reviewed based on international standards and literature on thermal comfort. For processing heating loads with radiant floor heating and air source heating systems, the heating capacity of radiant floor heating by 1 °C variation in floor temperature was calculated, and the remaining heating load was handled by the heating capacity of the convective air heating heat pump. Consequently, when the floor temperature was 25 °C, all heating loads were removed by radiant floor heating only. When handling all heating loads with the heat pump, 59.2% less energy was used compared with radiant floor heating only. Considering the local discomfort of the soles of the feet, the floor temperature is expected to be suitable at 22–23 °C, and 31.5–37.6% energy saving compared with those of radiant floor heating alone were confirmed.

Ground Source Heat Pump and Conventional Heat Sources to Match the Design and Operation Mode for Energy Saving

2013 ◽  
Vol 724-725 ◽  
pp. 955-959
Author(s):  
Lei Sun ◽  
Jia Fu Xiao ◽  
Chun Yu Ran ◽  
Li Yun Zhang
Keyword(s):  
Renewable Energy ◽  
Heat Source ◽  
Energy Saving ◽  
Heat Pump ◽  
Composite System ◽  
Operation Mode ◽  
Energy Utilization ◽  
Ground Source Heat Pump ◽  
Ground Source ◽  
Matching Design

According to China's current energy present situation, the use of renewable energy, saving energy and reducing consumption has become the energy industry development should follow the basic principles. Ground-source heat pump and conventional heat source composite system as a kind of building energy efficiency technology, mainly reflected in soil source heat pump renewable energy utilization aspects. In this paper the soil source heat pump and conventional heat source matching design and operation mode research, from the matching design principle chart, operation mode, the practical engineering application, economic and technical analysis into consideration, it is concluded that the soil source heat pump and conventional heat source composite system can be applied and research.

scholarly journals Energy Saving Quantification on Ductless Heat Pump (DHP) in Existing Homes

2020 ◽  
Author(s):  
Yan Chen ◽  
Karthikeya Devaprasad ◽  
Zhihong Pang ◽  
Cheryn E. Metzger
Keyword(s):  
Energy Saving ◽  
Heat Pump
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