Feasibility of using an integrated small-scale CHP unit plus desiccant wheel in a leisure complex

Babus'Haq, R.F.; Olsen, Helge; Probert, S.D.

doi:10.1016/0306-2619(95)00061-5

Cited by 20 publications

(3 citation statements)

References 3 publications

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“…Renewable energy sources are considered as the regenerated heat to save the electric power. The regenerated heat source was from an integrated small-scale Combined Heat and Power unit to regenerate the desiccant wheel in a leisure complex by Babus [3]. The performance of hybrid system was well and it took four years to recover the cost of device.…”

Section: Adsorption Desiccant Based Hybrid Air Conditioning Systemmentioning

confidence: 99%

Study on Adsorption Desiccant Based Hybrid Air Conditioning System

Huang

Lin

et al. 2012

AMR

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The desiccant based hybrid air conditioning system can control temperature and humidity separately, which consists of adsorption desiccant system and compression type refrigeration system. The adsorption desiccant system obtains the moisture power, and the compression type refrigeration can obtain sensible heat load. Generally, the regenerated energy consumption of the desiccant wheel is very large in the total energy consumption, using electric power, waste heat or renewable energy (solar etc). Heat recovery from the condenser considered as only regenerated energy in the new type adsorption desiccant based hybrid air conditioning system is proposed and discussed in this paper. This method can reduce much energy consumption, and make the air conditioning system structure simple.

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Section: Adsorption Desiccant Based Hybrid Air Conditioning Systemmentioning

confidence: 99%

Study on Adsorption Desiccant Based Hybrid Air Conditioning System

Huang

Lin

et al. 2012

AMR

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“…Waste heat from a natural-gas-fired combined heat-and-power (CHP) system has been employed to provide dehumidification for the indoor swimming pools in a leisure complex as described by Babus'Haq et al 14 Comparison of heat recovery systems in public indoor swimming pools has been reported by Lazzarin and Longo. 15 For the complex in this project, to remove the latent load of the upper floor, dehumidification system should be proposed.…”

Section: Many Measures and Technologies For Energy Conservation And Heat Recovery Formentioning

confidence: 99%

Investigating the effect of indoor water canal on the cooling load estimation and condensation issues of Venetian Macao

Han

Yang

2008

Building Services Engineering Research and Technology

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This paper reports the influence of the presence of a water canal on the cooling load calculation for an air-conditioned recreation centre in Macao, and investigates the condensation issue of lower floor ceiling caused by the relatively low temperature of canal water. Different canal surface water activities (water activity factor) cause different evaporation rates of canal water and result in the changes of cooling load. It is found that the design of the large indoor water canal leads to the increase of design cooling load of the upper floor of the centre, for example 304 kW (when water temperature is 20°C and surface activity factor equals 1, which is the function of evaporation rate), and condensation of the lower floor ceiling under canal occurs after an operation break of the air-conditioning system. To minimise the cooling load increase due to the presence of a water canal, the water activity of the canal should be lowered as much as possible, and several energy saving measures are recommended. Furthermore, to avoid the possible condensation phenomena and issue of water drop from the ceiling under the canal, the air humidity of the space under the water canal should be controlled strictly according to the design conditions. Practical application: Heat and mass transfer between the large water surface and the air-conditioned space results in the change of space cooling load in the spaces with large indoor water canal. The influences of the presence of the water canal, due to its evaporation and heat loss, on the cooling load estimation of the space should be investigated for accurately evaluating the cooling load and properly sizing the air conditioning systems in such types of buildings with large interior water facilities. As the evaporation rate changes due to the water activity level of the canal, the change of cooling load should be estimated considering the water activity levels. On the other hand, for the air-conditioned spaces under the canal, there is the arising issue of condensation due to the low temperature of the canal water. Condensation will occur when the external surface temperature of canal wall is lower than the dew point temperature of the nearby air. The process of the possible condensation issues of the lower floor has been analysed and recommendations are proposed according to the simulation results. This paper is useful in the design of air conditioning system for such types of complexes.

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“…The other interesting feature of this technology is that the low temperature heat (50-808C) required for regeneration can be obtained by integrating it with a solar thermal plant or utilizing waste heat from industrial or cogeneration process (Lof, 1992;Henning et al, 2001). Therefore, the desiccant based air-conditioning reduces the consumption of conventional energy (Babus'Haq et al, 1996;Henning and Erpenbeck, 1996). In a DEC system, the air dehumidifiers utilize either liquid or solid desiccants.…”

Section: Introductionmentioning

confidence: 99%

Simplified models for the performance evaluation of desiccant wheel dehumidification

Beccali

Butera

Guanella

et al. 2002

Int. J. Energy Res.

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In the present communication, simple models have been presented to evaluate the performance of rotary desiccant wheels based on different kind of solid desiccants e.g. silica gel and LiC1. The first part of the paper presents 'Model 54' which is developed for silica gel desiccant rotor. The model has been derived from the interpolation of experimental data obtained from the industry and the correlations have been developed for predicting outlet temperature and absolute humidity. The 'Model 54' consists of 54 coefficients corresponding to each correlation for outlet absolute humidity and temperature and it is found that the model predicts very well the performance of silica gel desiccant rotor (Type-I). In the second part of the paper, a psychrometric model has been presented to obtain relatively simple correlations for outlet temperature and absolute humidity. The developed psychometric model is based on the correlations between the relative humidity and enthalpy of supply and regeneration air streams. The model is used to predict the performance of three type of desiccant rotors manufactured by using different kind of solid desiccants (Type I, II and III). The model is tested corresponding to a wide range of measurement data. The developed psychometric model is simple in nature and able to predict very well the performance of different kind of desiccant rotors. Copyright (C) 2002 John Wiley Sons, Ltd

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Feasibility of using an integrated small-scale CHP unit plus desiccant wheel in a leisure complex

Cited by 20 publications

References 3 publications

Study on Adsorption Desiccant Based Hybrid Air Conditioning System

Study on Adsorption Desiccant Based Hybrid Air Conditioning System

Investigating the effect of indoor water canal on the cooling load estimation and condensation issues of Venetian Macao

Simplified models for the performance evaluation of desiccant wheel dehumidification

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