Utilizing Flexibility Services from a Large Heat Pump to Postpone Grid Reinforcement

2018 ◽  
Author(s):  
Sergey Klyapovskiy ◽  
Shi You ◽  
Rafael Calpe Domens ◽  
Henrik W. Bindner ◽  
Hanmin Cai
Keyword(s):  
Heat Pump ◽  
Large Heat ◽  
Grid Reinforcement

The Norwich Heat Pump

1948 ◽  
Vol 158 (1) ◽  
pp. 22-29 ◽  
Author(s):  
J. A. Sumner
Keyword(s):  
Great Britain ◽  
Heat Pump ◽  
Heat Engine ◽  
Electric Energy ◽  
Large Block ◽  
Coefficient Of Performance ◽  
Heating Season ◽  
Final Temperature ◽  
Financial Saving ◽  
Large Heat

The paper provides the history and constructional details and working results of what is believed to be the first large heat pump used for building heating in Great Britain. This machine was constructed and installed as an experimental machine for heating a large block of municipal buildings in Norwich. A brief explanation indicating the principle upon which the heat pump works is given. Reference is also made to the differences between the reversed heat engine when working as a refrigerator and when working as a heat pump. In the latter case there is a deliberate increase in the final temperature T1, from approximately 85 deg. F. to temperatures which may be of the order of 150–200 deg. F. The unsuitability of the term “coefficient of performance”—normally used as a criterion of refrigerator performance—when used as a coefficient relating to the heat pump is pointed out; and the use of a new, alternative term is suggested. The results are shown of operating the Norwich Heat Pump for two winter heating seasons. When using an unsuitable compressor the heat delivered to the building was found to be 3·45 times greater than the equivalent heat (electric) energy required to operate the machine, averaged over the 1945–6 winter heating season. With a more efficient compressor, installed later in 1946, a still better performance is anticipated. The actual costs of heating the building, with coal-fired boilers and a heat pump respectively, are shown in the form of a table. Conclusions indicated are that the heat pump can show a financial saving, as compared with the use of coal-fired boilers, and that it is practicable to use the heat pump in Great Britain for building heating throughout normal English winters.

scholarly journals Energy balancing in ground heat exchanger for heat pump systems – a case study with simulations

2019 ◽  
Vol 100 ◽  
pp. 00076
Author(s):  
Ewelina Stefanowicz ◽  
Małgorzata Szulgowska-Zgrzywa
Keyword(s):  
Renewable Energy ◽  
Heat Pump ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Cooling Load ◽  
Energy Balancing ◽  
Heating And Cooling ◽  
Large Heat ◽  
Heating Load

The negative impact of systems based on fossil fuel on the environment and the desire to promote sustainable development is increasingly encouraging building owners to invest in renewable energy sources. One of the possibilities of using a renewable energy source located in shallow soil layers is a brine-to-water heat pump. Ground energy can be used for both heating and cooling buildings. This article presents the advantages of balancing the supply and energy consumption from the ground for the large heat pump systems. Authors presented a case study and the simulation of the system operation with different cooling load share vs heating load. This was done on the basis of the analysis of data from several years of measurements from the actual installation as well as the simulation in Earth Energy Designer software. The results of the simulations shows that the most advantageous strategy for the operation of the analysed installation is to provide 50 to 75% of the cooling load in relation to the heating load.

Theoretical Study of Heat Pump System Using R744/R1234yf as Refrigerant

2015 ◽  
Author(s):  
Fujun Ju ◽  
Xiaowei Fan ◽  
Yaping Chen
Keyword(s):  
Heat Pump ◽  
Mass Fraction ◽  
Cycle Performance ◽  
Water Heater ◽  
Pump System ◽  
Heat Pump System ◽  
Heat Pump Water Heater ◽  
Large Heat ◽  
Zeotropic Mixture ◽  
Heat Sink Temperature

In this paper, the eco-friendly zeotropic mixture, R744/R1234yf was chosen as the alternative refrigerant in the instant heat pump water heater system. The cycle performance of heat pump was analyzed theoretically under the nominal working condition of heat pump system. The prediction results show that the new mixture has significant advantages for the instant heat pump with a large heat-sink temperature lift, and there exists an optimal mass fraction of R744/R1234yf, at which the maximum COPh should be obtained. The optimal mass fraction of R744/R1234yf is 17/83 and the system COPh should be attained to 4.29.

Selection of the Area of Window Openings of Residential Buildings in Conditions of Monsoon Climate of the Far East of the Russian Federation and Northern Areas of China

2019 ◽  
pp. 27-33
Author(s):  
Aleksei K. Solovyov ◽  
Bi Guofu
Keyword(s):  
Residential Buildings ◽  
Russian Far East ◽  
Far East ◽  
Heat Losses ◽  
Natural Light ◽  
Monsoon Climate ◽  
Northern Areas ◽  
Artificial Illumination ◽  
Heat Penetration ◽  
Large Heat

The term “window” in architecture usually stands for an opening in a wall or roof for penetration of natural light, sunrays and fresh air in premises. Recently, the requirement of contact with environment is added to this condition. It is especially relevant for residential buildings where rooms are considered residential if they have windows. The energy consumption of a building depends on sizes, form and location of windows. In winter, windows cause huge heat losses, in summer, on the other hand, large heat enters a building via the windows and is required to be removed by means of air conditioning. Moreover, windows are used for penetration of natural light in premises, which assists in saving of large amounts of power for artificial illumination. This article discusses partial solving the problem of the energy efficiency of residential buildings by determining the most efficient area of windows in terms of energy spending for compensation of heat losses via windows in winter, elimination of heat penetration through them in summer and energy losses for artificial lighting throughout the year. The analysis of the results of calculation of power consumption for residential premises in conditions of monsoon climate of the Russian Far East and Northern areas of China (PRC) is provided.

Sign in / Sign up

Export Citation Format

Share Document