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Solar and Heat Pump Systems for Residential Buildings Edited by Jean-Christophe Hadorn | PDF Free Download.
Jean-Christophe Hadorn started his career as a researcher on large-scale storage of solar heat in deep aquifers (1979–1981).
For several years, Mr. Hadorn has been appointed as External Manager of the Thermal Solar Energy and Heat Storage Research Program by the Swiss government.
Mr. Hadorn was a participant in IEA SHC Task 7 on “Central Solar Heating Plants with Seasonal Storage” (1981–1985) and initiated Task 26 on “Solar Combisystems” (1996–2000).
He was Operating Agent of Task 32 on “Heat Storage” (2003–2007). Since 2000, he leads an engineering company and designs solar thermal and PV plants.
In 2010, he was chosen by an international committee of the IEA as the Operating Agent for the IEA SHC Task 44 “Solar and Heat Pump Systems” also supported by the Heat Pump Programme under Annex 38, a project that produced this book.
This book is about a hybrid technology called “solar and heat pump.” It is basically the combination of a solar system with a heat pump delivering heat to a building.
When the sun is shining, the collectors will be the primary source of energy for the domestic hot water preparation and for space heating.
Furthermore, the daily solar production can be stored for future use for a few days. When the sun is less abundant or when the solar storage is empty, the heat pump will take over the duty. The source of the primary low-energy “heat” for the heat pump to operate can be air, ground, or water from a river or an aquifer.
A nice feature of the hybrid combination is that solar collectors can also be used as the provider of the primary heat for the heat pump. The two components will then operate in the so-called serial mode.
This book will analyze the behavior of the main combinations of solar and heat pump, derive facts from practical projects, provide results from simulations and laboratory tests, and draw conclusions based on 4 years of activity of a collaborative project developed under the auspice of the International Energy Agency.
This book is recommended to the HVAC (heating, ventilation, and air conditioning) industry, the HVAC engineers and students, energy systems designers and planners, architects, energy politicians, manufacturers of solar energy components, manufacturers of heat pumps, standardization bodies, heating equipment distributors, and researchers in HVAC and building systems.
Producing heat from solar energy is an established technology since the 1990s. The heat pump technology known since 1930 is becoming a standard solution to heat buildings and prepare domestic hot water in many countries.
Both markets have shown growth since 2000, especially the heat pump market noticeably in countries with a high share of hydroelectricity in their energy supply.
For some years, systems that combine solar thermal technology and heat pumps have been marketed to provide space heating and to produce domestic hot water.
The energy prices, the need to reduce the overall electricity demand, or the strategy to move to more efficient solutions for heating than the current ones, the European Union legislation, and future scenarios calling for more renewable energies have driven the change.
Strong initial development of a combination of solar and heat pump started some years ago with the help of early work from industry and research bodies in a few European countries.
Innovative companies have shown success stories in this early period and continue to promote the advantages of solar and heat pump combinations based on real experience.
The IEA Solar Heating and Cooling Program (SHC) launched in 2010 a 4-year project called Task 44, “solar and heat pump systems.”
This was a joint effort with the IEA Heat Pump Program (HPP) under the name “Annex 38” to contribute to a better understanding of SHP (for “solar and heat pump”) systems.
It is anticipated that the electricity cost will increase on the planet in the future, due to CO2 cost considerations and scarcity of energy resources.
Solar photovoltaics might change the picture if the technology is massively adopted. But still, highly efficient heat pumps reducing the electricity demand will be needed to substitute the fossil heating solutions that dominate the world energy market in the 2010s.
Combinations with solar collectors can increase the overall performance of a heat pump and will therefore also be an elegant solution of choice.
There are scientific and technological issues in integrating solar collectors and heat pump machines. The complexity lies in having two variable sources that should work together optimally.
Heat storage management and control strategies are also of prime importance for optimal design. This book will present the challenges and some solutions in all aspects.
T44A38 has concentrated its efforts on electrically driven heat pumps, not because other techniques such as sorption machines are not possible but because no participants in this international activity presented a project with a thermally driven machine.
The steady growth of solar thermal systems for more than three decades has shown that solar heating systems are both mature and technically reliable.
However, solar thermal systems have usually been sold as an add-on to a conventional hot water or space heating system.
In the future, we need to develop hybrid systems that offer a complete heating system based on renewables, one that is able to cover 100% of the heating demand of buildings. One very promising possibility is the combination of solar systems and heat pumps.
This book shows different ways in which these two technologies can be combined, and it presents the path to high-performance hybrid systems.
The book is the result of collaborative international work within the Solar Heating and Cooling Programme and the Heat Pump Programme of the International Energy Agency (IEA).
It is a great pleasure for me, as a former chairman of the IEA SHC Executive Committee, to introduce this book. The international work has led to some interesting findings on solar and heat pump combinations based on monitored data and the use of simulation.
The book presents all these findings and the methodologies needed to assess the energy performance of such combinations. It is an important contribution to the body of scientific knowledge on renewable heat that the IEA has been supporting for over 40 years.
I am sure that the reader will find new knowledge and inspiring ideas for future-oriented hybrid heating systems based on renewables.
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