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Optimizing a Small Ammonia Heat Pump with Accumulator Tank for Space and Hot Tap Water Heating

Lalovs, Arturs
Master thesis
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13706_FULLTEXT.pdf (4.310Mb)
13706_ATTACHMENT.zip (9.357Mb)
13706_COVER.pdf (234.4Kb)
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http://hdl.handle.net/11250/2350069
Utgivelsesdato
2015
Metadata
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  • Institutt for energi og prosessteknikk [2630]
Sammendrag
The heat pump market offers a wide variety of different residential heat pumps

where most of them utilize refrigerant R-410A which has high global warming

potential. Considering the fact that global policy starts to focus on issues related to

energy efficiency and harmful impact to the environment, it is necessary to investigate

over new refrigerants. As an alternative solution is to utilize natural refrigerants, such

as ammonia, which has almost zero global warming potential and zero ozone

depletion potential. Since the beginning of refrigeration era, ammonia has been used

in large capacity systems, whereas no attention has been paid to residential sector.

In this study, small ammonia heat pump with capacity of 8,4 kW for one

family house has been designed to provide heating of domestic water and space

heating via floor system.

Theoretical part of this study involves analysis of the present heat pump

market and comparison of different heat pump applications. Previous experience in

researches of small capacity ammonia systems have been summarized to highlight

related problems and design futures.

Practical part of this study involves calculations in the Engineering Equation

Solver with estimation of the heat pump performance and evaluation of necessary

storage tank volume for the heating system to provide efficient operation during

variable electricity prices.

Engineering part consists of principal drawing of the small ammonia heat

pump with list of components. Additional drawing of a house with floor heating

system is included as an example which shows possible application for the ammonia

heat pump.

The thesis consists of 80 pages, 73 equations, 7 tables, 44 figures, 3 drawings

and 3 appendices. 24 literature sources used for this thesis.

Keywords: small capacity ammonia heat pump; variable electricity prices;

storage tank; heat pump operational regimes.
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