Narrow search
Showing 1 - 10 of 4,964
Cover Image
The design and environmental evaluation of earth-to-air heat exchangers (EAHE). A literature review
Peretti, Clara; Zarrella, Angelo; De Carli, Michele; … - In: Renewable and Sustainable Energy Reviews 28 (2013) C, pp. 107-116
There is a rising interest in heating and cooling systems based on renewable energy sources. Air heating or cooling with earth-to-air heat exchangers (EAHE) is one approach for reducing ventilation heat losses and improving thermal comfort in buildings. A literature research was performed in...
Persistent link: https://www.econbiz.de/10010709350
Cover Image
Performance analysis of a rotary active magnetic refrigerator
Lozano, J.A.; Engelbrecht, K.; Bahl, C.R.H.; Nielsen, K.K. - In: Applied Energy 111 (2013) C, pp. 669-680
performance (COP) and efficiency of the system was carried out over a range of different hot reservoir temperatures, volumetric … efficiency, η2nd. Losses mapping indicated that friction and thermal leakage to the ambient are the most important contributors … reduction of the cold end thermal parasitic losses are expected to enhance the efficiency of the system. For an operating …
Persistent link: https://www.econbiz.de/10011041176
Cover Image
Thermal performance of a solar water heater with internal exchanger using thermosiphon system in Côte d'Ivoire
Koffi, Paul Magloire E.; Koua, Blaise K.; Gbaha, Prosper; … - In: Energy 64 (2014) C, pp. 187-199
temperatures recorded, mass flow rate and efficiency of collector. These tests are performed for a sunny day and a cloudy day. The …) when, the average heat exchanger effectiveness obtained is 70%. The experimental results show that mean daily efficiency is …
Persistent link: https://www.econbiz.de/10011055037
Cover Image
Simulation of potential standalone liquid desiccant cooling cycles
Das, Rajat Subhra; Jain, Sanjeev - In: Energy 81 (2015) C, pp. 652-661
LDCS (Liquid desiccant cooling systems), capable of achieving dehumidification and cooling with low-grade heat input, can be effectively used for treating fresh air in hot and humid regions. These can also be operated using non-concentrating solar collectors. The present study is concerned with...
Persistent link: https://www.econbiz.de/10011209524
Cover Image
Research on Energy Saving Potential for Dedicated Ventilation Systems Based on Heat Recovery Technology
Zhang, Lian; Zhang, Yu-Feng - In: Energies 7 (2014) 7, pp. 4261-4280
Research results have identified the use of heat pipe heat exchangers (HPHXs) for heat recovery as a way to reduce the pre-cooling and re-heating energy. This paper suggests decoupling dehumidification from cooling to reduce energy consumption. The feasible usage and the energy saving potential...
Persistent link: https://www.econbiz.de/10010790942
Cover Image
Renewable energy powered evacuated tube collector refrigerator system
Anand, S.; Gupta, A.; Tyagi, S. - In: Mitigation and Adaptation Strategies for Global Change 19 (2014) 7, pp. 1077-1089
, exergy loss, COP<Subscript>COOLING</Subscript>, COP<Subscript>HEATING</Subscript> and Exergy efficiency are studied with …
Persistent link: https://www.econbiz.de/10010994773
Cover Image
A review on thermoelectric cooling parameters and performance
Enescu, Diana; Virjoghe, Elena Otilia - In: Renewable and Sustainable Energy Reviews 38 (2014) C, pp. 903-916
This paper deals with a review of the main research aspects concerning the formulation of the parameters indicating the characteristics and performance of thermoelectric cooling devices, with particular reference to a number of recent publications. The specific aspects addressed include some...
Persistent link: https://www.econbiz.de/10010906644
Cover Image
Experiences with solar cooling systems in Kuwait
Al-Homoud, A.A.; Suri, R.K.; Al-Roumi, Raed; … - In: Renewable Energy 9 (1996) 1, pp. 664-669
Solar space cooling is important in the countries of the Arabian Peninsula where nearly half of the total produced electricity is used for air conditioning of residential commercial and public buildings. In Kuwait, large proportion of funds were allocated for research in solar cooling...
Persistent link: https://www.econbiz.de/10010806059
Cover Image
Study on the LWT control schemes of a heat pump for hot water supply
Choi, Jong Min - In: Renewable Energy 54 (2013) C, pp. 20-25
Heat pump systems have been widely used in buildings and industries due to their high performance. In this study, a leaving water temperature control scheme has been proposed for a water-to-water heat pump for hot water supply. The study was focused on the following four schemes: (1) using an...
Persistent link: https://www.econbiz.de/10010806207
Cover Image
Performance study of a photovoltaic solar assisted heat pump with variable-frequency compressor – A case study in Tibet
Keliang, Liu; Jie, Ji; Tin-tai, Chow; Gang, Pei; Hanfeng, He - In: Renewable Energy 34 (2009) 12, pp. 2680-2687
photovoltaic efficiency. To adapt to the continuously changing solar radiation and ambient temperature conditions, the refrigerant … with light breeze, the average COP could reach 6.01, and the average electricity efficiency, thermal efficiency and overall … efficiency were 0.135, 0.479 and 0.625 respectively. …
Persistent link: https://www.econbiz.de/10010807118