Enhancing the cooling potential of a solar-assisted desiccant cooling system by ground source free cooling

Berardi, Umberto; Heidarinejad, Ghassem; Rayegan, Saeed; Pasdarshahri, Hadi

doi:10.1007/s12273-020-0696-0

Cited by 15 publications

(2 citation statements)

References 38 publications

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“…At present, the application of solar energy and ground source heat pump coupling in coupled systems is a hot research topic. Many researchers at home and abroad have conducted research on solar assisted ground source heat pump for combined heating, and the research results have shown that the combined heating system has good energy efficiency and economic benefits, while also effectively solving the problem of soil cold accumulation in severe cold areas [5][6][7][8][9] . Therefore, developing and utilizing a series of renewable clean energy sources such as solar energy, highly integrating renewable clean energy with ground source heat pump technology, and leveraging their respective advantages is the development direction of ground source heat pump technology.…”

Section: Current Problems and Technical Prospects Of Ground Source He...mentioning

confidence: 99%

Feasibility analysis of ground source heat pump application technology in Northern China

Sun

2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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At present, building HVAC systems are systems with high energy consumption. To effectively control the energy consumption of HVAC systems and reduce environmental pollution, ground source heat pump technology can be applied. This article briefly introduces the working principle and technical characteristics of ground source heat pumps, and conducts on-site thermal response tests on a certain county in the northern region. Through on-site thermal response tests, the actual operating conditions of the heat pump are simulated, and the initial temperature and thermal conductivity of the rock and soil are measured using the reactive cycle method and constant power method. At the same time, the feasibility of its application is analyzed based on specific data on the energy-saving and emission reduction benefits of ground source heat pumps, Finally, the technical prospects for the problems existing in the development and application of ground source heat pump technology are proposed.

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Section: Current Problems and Technical Prospects Of Ground Source He...mentioning

confidence: 99%

Feasibility analysis of ground source heat pump application technology in Northern China

Sun

2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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“…The training hall adopts the machine dew-point air supply mode and adopts the variable total air volume system. The total air volume of air conditioning is calculated according to the total heat balance Berardi et al (2020), as shown in Eq. ( 16).…”

Section: Energy Consumption Analysis Of Trnsys Based On Matlab Optimized Modelmentioning

confidence: 99%

Heat and mass transfer model optimization and annual energy efficiency analysis for energy recovery indirect evaporative cooling

Liu

Guo

et al. 2021

Build. Simul.

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Indirect evaporative cooling (IEC) is a kind of high efficiency, energy-saving and environmental protection cooling technology, which has been widely used in data centers and other fields in recent years. In this paper, the optimized two-dimensional non-condensation state model of indirect evaporative cooling was proposed. Meanwhile the computer program was updated to solve the developed mathematical model under variable fresh air conditions. The optimized model was verified by the experimental data, and the maximum deviation was only 4.6%. Based on the modified model and the annual hourly meteorological parameters in Tianjin, China, it was analyzed the optimal heat transfer area of IEC used as fresh air pre-cooling unit under various air volumes to provide references for system design and equipment selection. Finally, taking an IEC-primary return air conditioning system of a gymnasium as an example, the hourly energy-saving effect of whole year was simulated by the developed IEC model. The simulation results showed that IEC could control the fresh air temperature below 27 °C and the moisture content below 18 g/kg throughout the year, and undertook 102.6% of the total fresh air cooling load. The findings are useful in future system optimization and design of IEC equipment.

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Performance study on a hybrid solid desiccant‐vapor compression air‐conditioning system for hot‐humid ambient conditions

Venkatesh,

Ganesh,

Rudramoorthy

2024

Heat Trans

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The paper focuses on the simulation and testing of a hybrid solid desiccant‐vapor compression air‐conditioning system under different hot‐humid climates. The simulation is carried out by a BLUEJ programming framework. Air at the lowest achievable temperatures from a solid desiccant cooling system is supplied to a standard vapor compression air‐conditioning system (VCAS). The cooling capacities of the hybrid system under three modes 1, 2, and 3, indicating different supply air conditions to the cabin, are reported in the paper. This paper expresses the trade‐off between having comfort conditions and reasonable comfort conditions inside the cooling space with energy efficiency as the inflection point. The more the study is moved towards the point of energy efficiency, the higher the reduction in the cooling capacities of the vapor compression air conditioner. This is demonstrated by the cooling capacity savings when the system is operated in three modes namely 1, 2, and 3. The substantial energy savings provided by Mode 1, Mode 2, and Mode 3 are 71%, 57%, and 37%, respectively. If the system is made to provide substantial cooling and focuses deeply on cooling capacity savings, then the system could save up to 77% in the cooling capacity of the vapor compression air‐conditioning system. If the system is made to operate solely with the milestone of comfort cooling for the occupants with any substantial savings in the cooling capacity of the vapor compression air‐conditioning system, then Mode 3 would deliver the milestone and give savings in the cooling capacities from 32% to 41% which is a significant savings. From the results of the performance study, it is inferred that the hybrid system provides significant energy savings compared to a standard air conditioner, especially in hot‐humid ambient conditions. The solid desiccant cooling system thus establishes itself as an effective pre‐cooler unit for a VCAS. The hybrid solid desiccant air‐conditioning in the paper is analyzed from the aspects of savings in cooling capacities of an existing vapor compression air‐conditioning system and comfort cooling. This is a newer operational approach, especially for using this hybrid solid desiccant cooling system for ambient humidity ratios greater than 15 kg−1 d.a.

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Enhancing the cooling potential of a solar-assisted desiccant cooling system by ground source free cooling

Cited by 15 publications

References 38 publications

Feasibility analysis of ground source heat pump application technology in Northern China

Feasibility analysis of ground source heat pump application technology in Northern China

Heat and mass transfer model optimization and annual energy efficiency analysis for energy recovery indirect evaporative cooling

Performance study on a hybrid solid desiccant‐vapor compression air‐conditioning system for hot‐humid ambient conditions

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