Numerical analysis of the heat pump water heater with immersed helically coiled tubes

Missaoui, Sami; Driss, Zied; Slama, Romdhane Ben; Chaouachi, Béchir

doi:10.1016/j.est.2021.102547

Cited by 19 publications

(5 citation statements)

References 31 publications

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“…It is also required to implement the nanofluids in thermal applications so that positive cases of suitability have been encountered in the heating process. Analysing the wide usage of solar-based water heating systems all across the country, it accumulates almost "USD 5.57 billion" in 2022 which is also expected to be increased to almost "9.56 billion USD" in 2032 [16]. Enhancing the matter of suitability will be done based on implementing the stable set of nanofluids with the optimum concentrations that provide a positive set of results in the overall assessments.…”

Section: Future Workmentioning

confidence: 99%

Comparative analysis of solar heaters and heat exchangers in residential water heating

Anand Kishorbhai Patel

2023

Int. J. Sci. Res. Arch.

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This research shows the comparative analysis between the solar heater and the heat exchanger efficiency. This is used for water heating in this project to show the use of this for residential purposes. The efficiency of these two is calculated in this project which helps to know the efficiency of each model in the water heating purpose. In this research process, a suitable set of comparisons has been drawn between the heat exchanger and water heater that have been worked on based on the effective solar energy. Effective energy usage provides a suitable beneficial impact in Favor of using this residential water heating system of heat exchangers. Detailed information has been represented in the background sections along with rationale aspects where the issues along with their remedies have been depicted.

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Section: Future Workmentioning

confidence: 99%

Comparative analysis of solar heaters and heat exchangers in residential water heating

Anand Kishorbhai Patel

2023

Int. J. Sci. Res. Arch.

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“…It was proposed that maximum heat transfer was observed for wrapping of steel wire at full length of tube instead of wrapping at two and four positions. Also, Missaoui et al, [46] numerically studied helical coil immersed in heat pump water heater and investigated effect of pitch of coil and storage tank dimensions over heating process. Hasan et al, [47] numerically analyzed SHC using water based nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Suggestion of Correlations to Obtain Shell and Tube Side Nusselt Numbers in Coiled Heat Exchangers

Magar Susheel Madhavrao,

Gugliani Gaurav Kumar,

Navthar Ravindra Rambhau

2024

ARFMTS

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In coiled tube heat exchangers increase in curvature ratio and effective contact of shell fluid with coil surface led to better thermal characteristics. This work addresses study of thermal performance, shell and tube heat transfer coefficients (ho and hi). Also, mathematical correlations are predicted to obtain shell and tube Nusselt numbers (Nuo and Nui). In the designing of compact coiled heat exchangers consisting of straight helical coil (SHC), conical coil (CC) and spiral coil knowledge of Nuo and Nui is necessary whereas mathematical correlation to calculate Nuo considering variations in shell geometry is not found. Five heat exchangers consisting of three cone coils (angle, ϴ = 30°, 50° and 70°), spiral coil (ϴ = 0°) and SHC (ϴ = 90°) are tested. Using Wilson plot method ho and hi are obtained for wide range of tube side Reynolds numbers (Rei = 3700 - 21000). It is observed that, highest ho is obtained for ϴ = 30°CC with better thermal performance. Lowest ho is obtained for ϴ = 90°SHC. Ratio of height of shell, Hs and diameter of shell, Dso is considered in prediction of single correlation as: Nuo = 16.55.Reo0.55.Pro0.4 *(Hs/Dso)0.096. Comparison with experimental findings shows variation of 0-14%. Similarly two correlations are proposed as: Nui = 0.0512.Rei0.80.Pri0.4.CRave0.18 and Nui = 0.0365.Dei0.815.Pri0.4.CRave-0.3. A fair agreement is found with existing researchers.

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“…The results indicated that the coupled unit of heat pumps system and multi-effect distillation unit are better than the conventional methods for water distillation. Missaoui et al [6] presented a coupled model of a heat pump and a water heating unit using the waste heat from helical condenser coil for domestic hot water supply. They indicated that the valorization of the heat rejected from condenser coil contributes in the reduction of the power bills for water heating and the reduction of the Carbone dioxide emissions.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of a coupled unit for space cooling and water desalination

Missaoui

Driss²,

Romdhane

et al. 2023

Preprint

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The waste heat recovery from condenser of air conditioning for seawater desalination is attractive because of its great energy and environmental value. This paper experimentally investigated a modified air conditioner with a desalination unit that operates in the space-cooling and seawater distillation. The experimental investigation was used to study the performance of the system for water distillation, the flow rate of the potable water and the amount of energy saving during the desalination process. The results confirmed that the temperature in the tank is equal to 72°C. With continuously used air conditioning, this value may become better. In these conditions, the maximum coefficient of performance (COP) of the air conditioning was around 6.11. In the integrated system, the potable water production rate was 730 ml/h. The proposed system provides the possibility to save energy which would lead to low cost of fresh water. Indeed, the GHG emissions were reduced.

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Numerical analysis of the heat pump water heater with immersed helically coiled tubes

Cited by 19 publications

References 31 publications

Comparative analysis of solar heaters and heat exchangers in residential water heating

Comparative analysis of solar heaters and heat exchangers in residential water heating

Suggestion of Correlations to Obtain Shell and Tube Side Nusselt Numbers in Coiled Heat Exchangers

Experimental study of a coupled unit for space cooling and water desalination

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