A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Heat Pumps for Sustainable Heating and Cooling
https://orcid.org/https://orcid.org/0000-0001-5606-6090
This chapter presents the operation principle of a heat pump (HP) and the necessity for using HPs in the heating/cooling systems of buildings, discusses the vapour compression-based HP systems and describes the thermodynamic cycle and they calculation, as well as operation regimes of a vapour compression HP with electro-compressor. The calculation of greenhouse gas emissions of HPs and energy and economic performance criteria that allow for implementing an HP in a heating/cooling system is considered. A detailed theoretical study and experimental investigations on ground source HP technology concentrating on ground-coupled heat pump (GCHP) systems are also included. Additionally, an analytical model for evaluation of the ground thermal conductivity and the borehole thermal resistance using a thermal response test is developed and the Earth Energy Designer (EED) simulation program is used to calculate the fluid temperature for a case study of the ground heat exchanger. An experimental study is performed to test the energy efficiency of the radiator or radiant floor heating system for an office room connected to a GCHP. Experimental measurements are also used to test the performance of a reversible vertical GCHP system at different operating modes. Fundamental efficiency parameters (coefficient of performance (COP) and CO2 emission) are obtained for one month of running using two control strategies of the GCHP: standard and optimised regulation of the water pump speed, and a benchmarking of these parameters is achieved. Exploratory research has indicated higher efficiency of the system for the flow regulation solution using a buffer tank and programmed control device for the circulation pump speed compared with the standard regulation solution (COPsys with 7–8% increase, and CO2 emissions with 7.5–8% decrease). Finally, two simulation models of thermal energy consumption in heating/cooling and domestic hot water operation were developed using TRNSYS software.
Heat Pumps for Sustainable Heating and Cooling
https://orcid.org/https://orcid.org/0000-0001-5606-6090
This chapter presents the operation principle of a heat pump (HP) and the necessity for using HPs in the heating/cooling systems of buildings, discusses the vapour compression-based HP systems and describes the thermodynamic cycle and they calculation, as well as operation regimes of a vapour compression HP with electro-compressor. The calculation of greenhouse gas emissions of HPs and energy and economic performance criteria that allow for implementing an HP in a heating/cooling system is considered. A detailed theoretical study and experimental investigations on ground source HP technology concentrating on ground-coupled heat pump (GCHP) systems are also included. Additionally, an analytical model for evaluation of the ground thermal conductivity and the borehole thermal resistance using a thermal response test is developed and the Earth Energy Designer (EED) simulation program is used to calculate the fluid temperature for a case study of the ground heat exchanger. An experimental study is performed to test the energy efficiency of the radiator or radiant floor heating system for an office room connected to a GCHP. Experimental measurements are also used to test the performance of a reversible vertical GCHP system at different operating modes. Fundamental efficiency parameters (coefficient of performance (COP) and CO2 emission) are obtained for one month of running using two control strategies of the GCHP: standard and optimised regulation of the water pump speed, and a benchmarking of these parameters is achieved. Exploratory research has indicated higher efficiency of the system for the flow regulation solution using a buffer tank and programmed control device for the circulation pump speed compared with the standard regulation solution (COPsys with 7–8% increase, and CO2 emissions with 7.5–8% decrease). Finally, two simulation models of thermal energy consumption in heating/cooling and domestic hot water operation were developed using TRNSYS software.
Heat Pumps for Sustainable Heating and Cooling
https://orcid.org/https://orcid.org/0000-0001-5606-6090
This chapter presents the operation principle of a heat pump (HP) and the necessity for using HPs in the heating/cooling systems of buildings, discusses the vapour compression-based HP systems and describes the thermodynamic cycle and they calculation, as well as operation regimes of a vapour compression HP with electro-compressor. The calculation of greenhouse gas emissions of HPs and energy and economic performance criteria that allow for implementing an HP in a heating/cooling system is considered. A detailed theoretical study and experimental investigations on ground source HP technology concentrating on ground-coupled heat pump (GCHP) systems are also included. Additionally, an analytical model for evaluation of the ground thermal conductivity and the borehole thermal resistance using a thermal response test is developed and the Earth Energy Designer (EED) simulation program is used to calculate the fluid temperature for a case study of the ground heat exchanger. An experimental study is performed to test the energy efficiency of the radiator or radiant floor heating system for an office room connected to a GCHP. Experimental measurements are also used to test the performance of a reversible vertical GCHP system at different operating modes. Fundamental efficiency parameters (coefficient of performance (COP) and CO2 emission) are obtained for one month of running using two control strategies of the GCHP: standard and optimised regulation of the water pump speed, and a benchmarking of these parameters is achieved. Exploratory research has indicated higher efficiency of the system for the flow regulation solution using a buffer tank and programmed control device for the circulation pump speed compared with the standard regulation solution (COPsys with 7–8% increase, and CO2 emissions with 7.5–8% decrease). Finally, two simulation models of thermal energy consumption in heating/cooling and domestic hot water operation were developed using TRNSYS software.
Heat Pumps for Sustainable Heating and Cooling
Sarbu, Ioan (author)
Advances in Building Services Engineering ; Chapter: 6 ; 447-557
2021-01-05
111 pages
Article/Chapter (Book)
Electronic Resource
English
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