Narrow search
Showing 1 - 10 of 280
Cover Image
Development of a software package for community energy system assessment – Part I: Building a load estimator
Chung, Mo; Park, Hwa-Choon - In: Energy 35 (2010) 7, pp. 2767-2776
demands for electricity, heating, cooling, and hot water for the mix of building types for 8760h of a year. The calculation is …
Persistent link: https://www.econbiz.de/10010811292
Cover Image
Direct expansion solar assisted heat pumps: A review of applications and recent research
Omojaro, Peter; Breitkopf, Cornelia - In: Renewable and Sustainable Energy Reviews 22 (2013) C, pp. 33-45
effectively use low temperature solar energy, the investigation of the heating and cooling applications of the system has advanced …Direct expansion solar assisted heat pump systems have widely been used in solar drying, water heating, space heating … heat pump systems. The review rightly point out the obvious shortage of investigation in the cooling application area of …
Persistent link: https://www.econbiz.de/10010664437
Cover Image
Experimental study of an air-source heat pump for simultaneous heating and cooling – Part 2: Dynamic behaviour and two-phase thermosiphon defrosting technique
Byrne, Paul; Miriel, Jacques; Lenat, Yves - In: Applied Energy 88 (2011) 9, pp. 3072-3078
This article presents the concepts of an air-source heat pump for simultaneous heating and cooling (HPS) designed for … hotels and smaller residential, commercial and office buildings in which simultaneous needs in heating and cooling are … frequent. The main advantage of the HPS is to carry out simultaneously space heating and space cooling with the same energy …
Persistent link: https://www.econbiz.de/10010576278
Cover Image
Temperature distributions in boreholes of a vertical ground-coupled heat pump system
Esen, Hikmet; Inalli, Mustafa; Esen, Yuksel - In: Renewable Energy 34 (2009) 12, pp. 2672-2679
results were obtained in cooling and heating seasons of 2006–2007. A two-dimensional finite element model (FEM) was developed … to simulate temperature distribution development in the soil surrounding the GHEs of GCHPs operating in the cooling and … the heating modes. The finite element modelling of the GCHP system was performed using the ANSYS code. The FEM …
Persistent link: https://www.econbiz.de/10011044785
Cover Image
Experimental investigation of a vapor compression heat pump used for cooling and heating applications
Fatouh, M.; Elgendy, E. - In: Energy 36 (2011) 5, pp. 2788-2795
) for various operating modes namely: cooling, heating and simultaneous cooling and heating. Results showed that COP … of condenser water inlet temperature. Actual COP of cooling mode between 1.9 to 3.1 and that of heating mode from 2.9 to … simultaneous space cooling (summer air conditioning) and hot water supply. In order to achieve this objective, a test facility was …
Persistent link: https://www.econbiz.de/10011054752
Cover Image
Impact of control schemes of a monovalent inverter-driven water-to-water heat pump with a desuperheater in continental and subtropical climates through simulation
Blanco, David L.; Nagano, Katsunori; Morimoto, Masahiro - In: Applied Energy 109 (2013) C, pp. 374-386
combined space heating and domestic hot water, in order to provide realistic results, from which four control schemes based on …, in Japan, for the coldest day of the year and for the heating season. Emphasis was given to the short-term domestic hot …
Persistent link: https://www.econbiz.de/10010678785
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
Experimental study of horizontal ground source heat pump performance for mild climate in Turkey
Pulat, Erhan; Coskun, Salih; Unlu, Kursat; … - In: Energy 34 (2009) 9, pp. 1284-1295
winter climatic condition of Bursa, Turkey. For this purpose, a previously used experimental facility on cooling cycle … refrigeration machine. International Journal of Energy Research 2008; 32: 44–56] was modified for the heating cycle. Soil thermal …. Tests were performed under laboratory conditions for space heating from December 2004 to March 2005. Variations of entering …
Persistent link: https://www.econbiz.de/10010811135
Cover Image
Analysis of a novel metal hydride cycle for simultaneous heating and cooling
Sajid Ahmed, Syed; Srinivasa Murthy, S. - In: Renewable Energy 29 (2004) 4, pp. 615-631
Out of the many promising applications of metal hydrides, refrigeration, heat pumping and heat transformation are important. In order to achieve improved performance, a novel three-alloy cycle is proposed in which, for heat input at an intermediate temperature, heat outputs at high temperature...
Persistent link: https://www.econbiz.de/10010803991
Cover Image
A non-conventional interpretation of thermal regeneration in steam cycles
Bracco, Stefano; Damiani, Lorenzo - In: Applied Energy 97 (2012) C, pp. 548-557
The paper aims to contribute to a better understanding of the thermodynamic concept of heat regeneration in steam power plants with a finite number of bleedings. A regenerative Rankine cycle is compared to a complex system (CHC – complete hybrid cycle) composed by one non-regenerative Rankine...
Persistent link: https://www.econbiz.de/10010702470