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Thesis topic proposal
 
Miklós Kassai
Energetic investigation of energy recovery technologies in air handling units

THESIS TOPIC PROPOSAL

Institute: Budapest University of Technology and Economics
mechanical engineering
Géza Pattantyús-Ábrahám Doctoral School of Mechanical Engineering

Thesis supervisor: Miklós Kassai
Location of studies: Building Services and Process Engineering
Abbreviation of location of studies: EPGET


Description of the research topic:

a.)Antecedents:
The statistical data show that the application of active cooling is spread üdely in
residential and public buildings. In these buildings the ventilation proportion is
significantly increased in the whole energy consumption. There are similar problems in the
operation of post-insulation of existing buildings. In this case the energy consumption of
the ventilation system gives a major proportion of the whole building services energy
consumption. The timeliness of this research theme shows that the actual available
calculation procedures and technical designing data are only rough approximations for
analyzing the energy consumption of air handling units and the energy saved by the
integrated heat or energy recovery units. There are not exact methods and unequivocal
technical data.
In previous researches the production and development companies have not investigated
the effectiveness of the energy recovery units under difference ambient air conditions and
the period of defrost cycle when the heat recovery can only partly operate under difference
ambient air temperatures. During this term a re-heater has to fully heat up the ambient cold
air to the temperature of supplied air and generate the required heating demand to provide
the necessary indoor air temperature.
b.) Aim of research:
Object of this research work is to conduct experimental and simulation investigation of the
effectiveness, heat and moisture transfer characteristic of energy recovery units under
different ambient air conditions.
c.) Tasks, main itemso nec€§§ary time:
Firstly an extensive literature review is required to perform in the topic. The task of the
candidate is to determine the effectiveness of the energy recovery unit by conducting
temperature and humidity experimental testing. Transient investigation of the effectiveness
of energy recovery. Investigation of heat and moisture transfer characteristics of energy
recovery unit. Using the data run by the tests and simulation software getting more exact
results closer to the real operation.
The necessary time request of the work: 3 years (6 semesters)
d.) Required equipment:
Energy recovery test facility installed into the Macskásy Indoor Air Quality and Thermal
Comfort Laboratory of Department of Building Services and Process Engineering.
e.) Expected scientific results:
The attribute of the research work is working out of methods for basic science, but the new
scientific results can be applicable relatively fast in the practice, and there is a high interest
for these new scientific results also in the building service engineers and experts who
works in the practice.
f.) References:
t1] Mohammad Rafati Nasr, Miklos Kassai, Gaoming Ge, Carey J. Simonson: Evaluation of
defrosting methods for air-to-air heat/energy exchangers on energy consumption of ventilation.
Apptied Energy. Impact Factor: 5.613, vol. 151, pp. 3240, DoI:
l 0. 1 0 l 6/j.apenergy.2O 1 5 .04.022, (20 1 5). (WoS: Q 1 ; SJR: Q2) tl] Miklos Kassai, Mohammad Rafati Nasr, Carey J. Simonson: A developed procedure to predict
annual heating energy by heat and energy recovery technologies in different climate European
countries. Energy and Buildings. Imnact Factor: 2.884. Vol. l09 pp. 267-273, DoI:
10.1016/j.enbuild.2O15.10.008 (2015). (WoS: Q1; SJR: Q1)
L2] Miklos Kassai: Effectiveness and humidification capacity investigation of liquid-to-air
membrane energy exchanger under low heat capacity ratios at winter air conditions. Journal of
Thermal Science. vo1.24, No.4, pp. 39I-397, DOI: l0.1007/s11630-015-0800-4, Impact
F'actor: 0.401 (2015) (WoS: Q4; SJR: Q3)
t3] Miklos Kassai, Carey J. Simonson: Performance investigation of liquid-to-air membrane energy
exchanger under low solutiorr/air heat capacity rates ratio conditions. Building Servicós
Engineering Research & Technology. vol. 36(5) pp. 535-545 doi:
1 0.I l7 7 l 0 l 43 62441 45 64445 . Imoact F actor z 0.7 27. (20 1 5 ). (WoS : Q3 ; SJR: Q2)
I4l Miklos Kassai, Carey J. Simonson: Experimental effectiveness investigation of liquid-to-air
membrane energy exchangers under low heat capacity rates conditions. Experimental Heat
Transfer. vol.29, pp. 1-11, DOI: 10.1080/08916152.2015.I02435I.Impact F'actor: 0.979.
(2014). (WoS: Q2; SJR:Q2)
t5] Miklos Kassai, Gaoming Ge, Carey J. Simonson: Dehumidification performance investigation of liquid-to-air membrane energy exchanger system. Thermal Science. DOI:
l0.2298lTSCI1408l6l29K Impact F'actor: 1.222. (Accepted article!) (2014). (WoS: Q2; SJR:
Q2)
t6] LászlőKajtár, Miklós Kassai,László Bánhidi: Computerised simulation of energy consumption
of air handling units. Energy and Buildings, Impact Factor: 2.465,ISSN: ISSN: 0378-7788,
DOI: 10. 1 0 1 6/j.enbuild.20 1 1. 1 0.0 1 3, p. 54-59. (20 1 1 ). (WoS: Ql ; SJR: Q 1)

Number of students who can be accepted: 1

Deadline for application: 2016-10-19

 
All rights reserved © 2007, Hungarian Doctoral Council. Doctoral Council registration number at commissioner for data protection: 02003/0001. Program version: 1.2318 ( 2016. XI. 26. )