Comparative performance analysis of different novel regenerative evaporative cooling device topologies

Kashyap, Sarvesh; Sarkar, Jahar; Kumar, Amitesh

doi:10.1016/j.applthermaleng.2020.115474

Cited by 28 publications

(8 citation statements)

References 27 publications

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“…The performance of the cooler is measured in terms of heat extraction (cooling) capacity from the product air stream as it moves along the heat exchanger from 1 to 2. It is calculated in terms of airflow rate, specific heat, and temperature drop [40,41].…”

Section: Performance Assessmentmentioning

confidence: 99%

Advancements in Indirect Evaporative Cooling Systems through Novel Operational Configuration

Jamil¹,

Shahzad²,

Xu³

et al. 2023

Recent Updates in HVAC Systems

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Rising global temperature has triggered the cooling demand in the last three decades with growing predictions for the future. The use of conventional energy-intensive and high global warming chemical-based cooling systems is working in a loop, increasing the global warming rate, emissions, and cooling system inventory. Therefore, the development of an innovative cooling system with high energy efficiency, low monetary cost, and environmentally sustainable. The indirect evaporative cooling-based systems have shown potential to serve the purpose because of low energy consumption, absence of energy, and cost-intensive equipment like compressors and water-based operation. A novel indirect evaporative cooler based on an innovative operational configuration is proposed, fabricated, and tested experimentally. The Proposed system has several advancements compared to the conventional indirect evaporative coolers like high operational reliability, low maintenance, and better control of the processes in the system. The study shows that the proposed system can achieve a temperature drop of as high as 14°C. The maximum cooling capacity of the system is calculated as 110 W, and the cooling performance index of 28. The performance of the cooler improves with increasing outdoor air temperature which makes it suitable for diverse climatic conditions. Moreover, the proposed design offers several benefits due to novel operational configurations by addressing limitations in the earlier systems.

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Section: Performance Assessmentmentioning

confidence: 99%

Advancements in Indirect Evaporative Cooling Systems through Novel Operational Configuration

Jamil¹,

Shahzad²,

Xu³

et al. 2023

Recent Updates in HVAC Systems

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“…Hallaka couple a DPM based on the SCM by comprising differential equations in a single shaft kiln [11], then Duan established a combined porous medium model and shrinking core model to investigate the gas-solid heat transfer and limestone decomposition process of an annular shaft lime kiln and a PFR lime kiln [12,13]. Kashyap analyzes the performance of a regenerative evaporative cooler with all the possible configurations of the air-flow direction by keeping the water flow in a natural (gravitydriven) downward direction [14]. Garcia-Tenorio presents a methodology to select the appropriate signals to produce data-driven models of the kiln as a linear interacting system [15].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study of Mixed Particle Size Calcination Processes in the Calcination Zone of a Parallel Flow Regenerative Lime Kiln

Duan

Rong

2022

Materials

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Limestone of different particle sizes is often calcined together to improve production efficiency, but the calcination effect of mixed particle size limestone is difficult to guarantee. To investigate the effect of different particle size combinations on calcination, this study uses a porous media model and a shrinking core model to simulate the calcination process for a single particle size and two mixed particle sizes in a Parallel Flow Regenerative lime kiln (PFR lime kiln). The results of the study show that an increase in void fraction has a small effect on the gas temperature. The temperature also does not change with particle sizes. At the same time, the decomposition is poor near the wall and better the closer to the center of the calcination zone. In addition, when the particle sizes differ by 2 times, the decomposition of small limestone particles had less influence, and the decomposition of large particles was also better. When the particle sizes differ by 3 times, the decomposition of both limestone sizes is more affected, especially for the larger limestone size, where only the outer surface is involved in the decomposition.

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“…Evaporative cooling is an alternative technology that can be used to sustainably replace conventional vapor‐compression refrigeration systems, 5 especially in warm, arid regions 6 . This cooling technology consists of reducing the temperature of the environment through the continuous evaporation of water, removing heat from the environment 7 .…”

Section: Introductionmentioning

confidence: 99%

“…2 Due to the requirement on the major world economies to develop alternative technologies that reduce the energy demand 3 and consequential environmental damages, researchers around the world work on the design of sustainable cooling devices. 4 Evaporative cooling is an alternative technology that can be used to sustainably replace conventional vapor-compression refrigeration systems, 5 especially in warm, arid regions. 6 This cooling technology consists of reducing the temperature of the environment through the continuous evaporation of water, removing heat from the environment.…”

Section: Introductionmentioning

confidence: 99%

Combining psychrometrics and fluid dynamics in a cyclone: A sustainable indirect evaporative cooling design

Dias

Ullmann

Silva

et al. 2021

Env Prog and Sustain Energy

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Brazilian countryside has well-defined dry seasons that are mainly characterized by low relative humidity. The warm, dry air provides a thermal cooling effect when it interacts with wet porous structures (psychrometric effect). Depending on temperature conditions and relative humidity, it is possible to achieve up to 18.0 K reduction in the temperature of the structure, caused by water evaporation. Thus, the objective of this study was to propose and numerically investigate a low cost and sustainable air conditioning system by combining the potential of warm, dry air and characteristics of the flow within cyclones covered with thin wet cotton fabric. A validated mathematical model was developed, and the numerical results indicate that the cyclonic-psychrometric system can provide up to 7.0 K reduction in a 20.0 m 2 room on a warm day (305.0 K) with low relative humidity (20.0%). Energy balances and technical estimates showed that the electric power consumed by the proposed system would represent only 19.8% of the power required by a conventional 18,000 Btu air conditioner to promote the same reduction of temperature. This energy-saving would have a direct and positive impact on the budget of users, especially those with low income and that live in dry regions.

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Comparative performance analysis of different novel regenerative evaporative cooling device topologies

Cited by 28 publications

References 27 publications

Advancements in Indirect Evaporative Cooling Systems through Novel Operational Configuration

Advancements in Indirect Evaporative Cooling Systems through Novel Operational Configuration

Numerical Simulation Study of Mixed Particle Size Calcination Processes in the Calcination Zone of a Parallel Flow Regenerative Lime Kiln

Combining psychrometrics and fluid dynamics in a cyclone: A sustainable indirect evaporative cooling design

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