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Exergetic Performance of the Desiccant Heating, Ventilating, and Air-Conditioning (DHVAC) System

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Desiccant Heating, Ventilating, and Air-Conditioning Systems

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Abstract

The developed desiccant heating, ventilating and air-conditioning (DHVAC) system was evaluated using the exergetic method under controlled environmental conditions to determine the performances of the whole system and its components. Percentage contributions of exergy destruction of system components at different regeneration temperatures and reference temperatures were determined. Exergy destruction coefficient of different components at different regeneration and reference temperatures was presented. It was shown that exergetic performances varied with respect to the regeneration and reference temperatures. The exergetic performances based on thermal, electric, total exergy input, first definition and second definition efficiencies were shown. Based on the results, reference and regeneration temperatures affected the determination of the system performances and its components. It was shown that air heating coil (AHC), air fans and desiccant wheel (DW) contributed to large percentage of exergy destruction. Hence, the mentioned components should be given attention for further improvement in the system performances.

This chapter is an updated version of our paper [1].

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Abbreviations

AHC/HC:

Air heating coil

C p :

Specific heat, kJ kg−1 K−1

DEC/EC:

Direct evaporative cooler

DHVAC:

Desiccant heating, ventilating and air-conditioning

DW:

Desiccant wheel

D P :

Depletion number

E :

End

EA:

Exit air

EAF:

Exit air fan

HX [1]:

Primary heat exchanger (big)

HX [2]:

Secondary heat exchanger (small)

h :

Enthalpy, kJ kg−1

I E :

Electric current, A

I rr :

Irreversibility, kW

L, M, N :

Variables

ṁ :

Mass flow rate, kg s−1

OA:

Outdoor air

OAF:

Outdoor air fan

P :

Pressure, Pa

\( \dot{Q} \) :

Heat transfer rate, kW

\( \dot{Q}_{X} \) :

Input exergy in air heating coil, kW

R :

Gas constant, kJ kg−1 K−1

RA:

Return air

RegT:

Regeneration temperature

RT:

Reference temperature

Ṡ :

Entropy rate, kW K−1

S :

Start

SA:

Supply air

t :

Time, s

T :

Temperature, K

Ẇ :

Work rate, kW

ε :

Efficiency

ψ :

Specific flow exergy, kJ kg−1

ω :

Humidity ratio, kgVapor kg −1Air

⏀ :

Relative humidity, %

a:

Air

Des:

Destruction

e:

Exit

EX :

Exergy

Gen:

Generation

HX:

Heat exchanger

i:

Inlet

l:

Liquid

ma:

Moist air

N:

Node

o:

Outlet

r:

Reference condition

Sys:

System

v:

Vapor

w:

Water

References

  1. Enteria N, Yoshino H, Takaki R et al (2013) Effect of regeneration temperatures in the exergetic performances of the developed desiccant-evaporative air-conditioning system. Int J Refrig 36:2323–2342

    Article  Google Scholar 

  2. Enteria N, Mizutani K (2011) The role of the thermally activated desiccant cooling technologies in the issue of energy and environment. Renew Sust Energ Rev 15:2095–2122

    Article  Google Scholar 

  3. Choudhury B, Saha BB, Chatterjee PK et al (2013) An overview of developments in adsorption refrigeration systems towards a sustainable way of cooling. Appl Energ 104:554–567

    Article  Google Scholar 

  4. Henning HM, Erpenbeck T, Hindenburg C et al (2001) The potential of solar energy use in desiccant cooling cycles. Int J Refrig 24:220–229

    Article  Google Scholar 

  5. Panaras G, Mathioulakis E, Belessiotis V (2011) Solid desiccant air-conditioning systems—design parameters. Energy 36:2399–2406

    Article  Google Scholar 

  6. Hurdogan E, Buyukalaca O, Yilmaz T et al (2010) Experimental investigation of a novel desiccant cooling system. Energ Buildings 42:2049–2060

    Article  Google Scholar 

  7. Bourdoukan P, Wurtz E, Joubert P et al (2008) Potential of solar heat pipe vacuum collectors in the desiccant cooling process: modeling and experimental results. Sol Energy 82:1209–1219

    Article  Google Scholar 

  8. Enteria N, Mizutani K, Monma Y et al (2011) Experimental evaluation of the new solid heat pump system in Asia-Pacific climatic conditions. Appl Therm Eng 31:243–257

    Article  Google Scholar 

  9. Cho WH, Kato S (2011) Outline of batch type desiccant air-conditioning system and humidification-heating performance. Part 1: Study on development of residential desiccant air-conditioning system and its performance evaluation. Archit Inst Jpn J Environ Eng 75:835–844

    Google Scholar 

  10. Finocchiaro P, Beccali M, Nocke B (2012) Advanced solar assisted desiccant and evaporative cooling system equipped with wet heat exchanger. Sol Energy 86:608–618

    Article  Google Scholar 

  11. Bejan A (2006) Advanced engineering thermodynamics. Wiley, New Jersey

    Google Scholar 

  12. Hepbasli A (2008) A key review on exergetic analysis and assessment of renewable energy resources for a sustainable future. Renew Sust Energ Rev 12:593–661

    Article  Google Scholar 

  13. Li H, Yang HX (2010) Energy and exergy analysis of multi-functional solar-assisted heat pump system. Int J Low-Carbon Technol 5:130–136

    Article  Google Scholar 

  14. Rosen M (2001) The exergy of stratified thermal energy storages. Sol Energy 71:173–185

    Article  Google Scholar 

  15. Kaushik SC, Siva Reddy V, Tyagi SK (2011) Energy and exergy analyses of thermal power plants: a review. Renew Sust Energ Rev 15:1857–1872

    Article  Google Scholar 

  16. Fakheri A (2010) Second law analysis of heat exchangers. J Heat Transf 132:1–7

    Article  Google Scholar 

  17. Caliskan H, Dincer I, Hepbasli A (2011) Exergetic and sustainability performance comparison of novel and conventional air cooling systems for building applications. Energ Buildings 43:1461–1472

    Article  Google Scholar 

  18. Koroneos C, Nanaki E, Xydis G (2010) Solar air conditioning systems and their applicability—an exergy approach. Resour Conserv Recy 55:74–82

    Article  Google Scholar 

  19. Marletta L (2010) Air conditioning systems from a 2nd law perspective. Entropy 12:859–877

    Article  Google Scholar 

  20. Zhai H, Dai YJ, Wu JY et al (2009) Energy and exergy analyses on a novel hybrid solar heating, cooling and power generation system for remote areas. Appl Energ 86:1395–1404

    Article  Google Scholar 

  21. Torio H, Anglotti A, Schmidth D (2009) Exergy analysis of renewable energy-based climatisation systems for buildings: a critical review. Energ Buildings 41:248–271

    Article  Google Scholar 

  22. Kanoglu M, Carpinlioglu MO, Yildirim M (2004) Energy and exergy analyses of an experimental open-cycle desiccant cooling system. Appl Therm Eng 24:919–932

    Article  Google Scholar 

  23. La D, Li Y, Dai YJ (2012) Development of a novel rotary desiccant cooling cycle with isothermal dehumidification and regenerative cooling using thermodynamic analysis method. Energy 44:778–791

    Article  Google Scholar 

  24. Pons M, Kodama A (2000) Entropic analysis of adsorption open cycles for air conditioning. Part 1: first and second law analyses. Int J Energ Res 24:251–262

    Article  Google Scholar 

  25. Hurdogan E, Buyukalaca O, Hepbasli A (2011) Exergetic modeling and experimental performance assessment of a novel desiccant cooling. Energ Buildings 43:1489–1498

    Article  Google Scholar 

  26. Enteria N, Yoshino H, Mochida A (2013) First and second law analysis of the developed solar-desiccant cooling system. Energ Buildings 60:239–251

    Article  Google Scholar 

  27. Lavan Z, Monnier JB, Worek WM (1982) Second law analysis of desiccant cooling systems. J Sol Energy Eng 104:229–236

    Article  Google Scholar 

  28. Kodama A, Jin W, Goto M (2000) Entropic analysis of adsorption open cycles for air conditioning. Part 2: Interpretation of experimental data. Int J Energ Res 24:263–278

    Article  Google Scholar 

  29. Shen CM, Worek WM (1996) The second-law analysis of a recirculation cycle desiccant cooling system: cosorption of water vapor and carbon dioxide. Atmos Environ 30:1429–1435

    Article  Google Scholar 

  30. Enteria N, Yoshino H, Satake A (2010) Experimental heat and mass transfer of the separated and coupled rotating desiccant wheel and heat wheel. Exp Therm Fluid Sci 34:603–615

    Article  Google Scholar 

  31. Rosen MA, Dincer I, Kanoglu M (2008) Role of exergy in increasing efficiency and sustainability and reducing environmental impact. Energ Policy 36:128–137

    Article  Google Scholar 

  32. Dincer I, Rosen M (2013) Exergy: energy, environment and sustainable development. Elsevier, UK

    Google Scholar 

  33. Caliskan H, Hepbasli A, Dincer I et al (2011) Thermodynamic performance assessment of a novel air cooling cycle: Maisotsenko cycle. Int J Refrig 34:980–990

    Article  Google Scholar 

  34. Kanoglu M, Bolatturk A, Altuntop N (2007) Effect of ambient conditions on the first and second law performance of an open desiccant cooling process. Renew Energ 32:931–946

    Article  Google Scholar 

  35. Xiong ZQ, Dai YJ, Wang RZ (2010) Development of a novel two-stage liquid desiccant dehumidification system assisted by CaCl2 solution using exergy analysis method. Appl Energ 87:1495–1504

    Article  Google Scholar 

  36. Gebreslassie BH, Medrano M, Boer D (2010) Exergy analysis of multi-effect water-LiBr absorption systems: from half to triple effect. Renew Energ 35:1773–1782

    Article  Google Scholar 

  37. Kaushik SC, Arora A (2009) Energy and exergy analysis of single effect and series flow double effect water-lithium bromide absorption refrigeration systems. Int J Refrig 32:1247–1258

    Article  Google Scholar 

  38. Luo HL, Dai YJ, Wang RZ (2006) Experimental investigation of a solar adsorption chiller used for grain depot cooling. Appl Therm Eng 26:1218–1225

    Article  Google Scholar 

  39. Askalany AA, Salem M, Ismael IM (2013) An overview on adsorption pairs for cooling. Renew Sust Energ Rev 19:565–572

    Article  Google Scholar 

  40. Wang RZ, Ge TS, Chen CJ (2009) Solar sorption systems for residential applications: options and guidelines. Int J Refrig 32:638–660

    Article  Google Scholar 

  41. Enteria N, Yoshino H, Mochida A et al (2015) Exergoeconomic evaluation of desiccant-evaporative air-conditioning system at different regeneration and reference temperatures. Int J Refrig 56:81–98

    Google Scholar 

  42. Enteria N, Yoshino Y, Satake A (2016) Exergoenvironmental evaluation of the desiccant air-conditioning system subjected to different regeneration temperatures. Int J Refrig Air-Cond. doi: http://dx.doi.org/10.1142/S2010132516500231

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Authors and Affiliations

  1. Building Research Institute, Tsukuba, Japan

    Napoleon Enteria

  2. Tohoku University, Sendai, Japan

    Hiroshi Yoshino & Akashi Mochida

  3. Akita Prefectural University, Akita, Japan

    Rie Takaki

  4. Maeda Corporation, Tokyo, Japan

    Akira Satake

  5. Tokyo Polytechnic University, Atsugi, Japan

    Ryuichiro Yoshie

Authors
  1. Napoleon Enteria
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  2. Hiroshi Yoshino
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  3. Rie Takaki
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  4. Akashi Mochida
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  5. Akira Satake
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  6. Ryuichiro Yoshie
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Correspondence to Napoleon Enteria .

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Editors and Affiliations

  1. Building Research Institute, Tsukuba, Ibaraki, Japan

    Napoleon Enteria

  2. University of Reading, Reading, Berkshire, United Kingdom

    Hazim Awbi

  3. Tohoku University, Sendai, Miyagi, Japan

    Hiroshi Yoshino

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Enteria, N., Yoshino, H., Takaki, R., Mochida, A., Satake, A., Yoshie, R. (2017). Exergetic Performance of the Desiccant Heating, Ventilating, and Air-Conditioning (DHVAC) System. In: Enteria, N., Awbi, H., Yoshino, H. (eds) Desiccant Heating, Ventilating, and Air-Conditioning Systems. Springer, Singapore. https://doi.org/10.1007/978-981-10-3047-5_5

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  • DOI: https://doi.org/10.1007/978-981-10-3047-5_5

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