Heat Pumps Articles

  • Air Source Heat Pump Pros And Cons

    Advantages of air source heat pump: 1. Energy-saving: the average temperature is above 10 degrees. The unit consumes 1 kWh of electricity and can produce more than 4 kW of heat. It saves more than 70% of electricity bills than electric water heaters, and saves energy much compared to other water heaters. 2. ...

  • What can you achieve with a solar system and battery?

    People often ask us about energy self-sufficiency. Just how hard is it to get to that point where you no longer have to pay a large corporation each time you turn on the kettle? This will depend on your usage patterns but for most people, a mix of renewable systems is the best option. We’ve taken a look at Gabriel’s home renewable systems as an example. Perhaps unsurprisingly, Gabriel ...


    By SunGift Solar Ltd

  • Sun at Night: Sunny Boy Storage in the Field

    Heinrich Eurich reports on his initial experiences with his PV storage system comprising the Sunny Boy Storage and Tesla Powerwall. As part of the field test for the Sunny Boy Storage, the SMA employee was one of the first to have the new storage system installed. “Darn it, back payments again!” That’s how I always reacted when the annual electricity bill from the public utility ...


    By SMA Solar

  • Emotion Energy - Air Source Heat pump case study

    Customer: Emotion Energy Location: Dumfries Heating System: 12KW Calorex Air to Water Heat Pump Installed: 09 Vortex was installed by Emotion Energy on an old isolated cottage which had been extended. They replaced an old oil boiler with a Calorex 12KW air to water heat pump and fitted Vortex ...


    By Vortex Energy Saver

  • Norwich - open vent boiler case study

    Customer: Malcolm Robinson Location: Norwich, Norfolk Heating System: Open Vent Glow Worm 85-100 Boiler Installed: 11/09 This is a spacious four bedroom detached house, which was built in 1979. The owner installed a Vortex in November 2009 and compared his energy bills from winter 2008-2009 (pre Vortex) against winter 2009-2010 (with Vortex). The heating for ...


    By Vortex Energy Saver

  • Energy and exergy analysis of a solar–assisted heat pump space heating system for clear days

    The studies over solar–assisted heat pump systems have been performed mostly on time periods when solar radiation is high. Therefore, this study focuses on performance analysis of a solar–assisted heat pump system which stores the energy during the clear day and uses it as a heat source of heat pump space heating system during the night. Energy and exergy analyses divided into two parts, which ...


    By Inderscience Publishers

  • Steady versus dynamic exergy analysis: the case of an air source heat pump

    Exergy analysis is often performed statically, for given system conditions and reference state. Dynamic exergy analyses, considering the variation of system operation and ambient conditions, would obviously be more time consuming. Therefore comparing the results of the two approaches helps understand when the dynamic methodology should be preferred. In this paper the yearly behaviour of a ...


    By Inderscience Publishers

  • Exergetic and sustainability performance assessment of geothermal (ground source) ejector heat pumps

    Although ejectors have been used in cooling/refrigeration and Heat Pumps (HP) applications for a long time, utilisation of Geothermal Ejector Heat Pump (GEHP) with Ground–Heat Exchanger (GHE) is a new idea, which has recently appeared in the literature. In this study, we model a GEHP system with a GHE in terms of exergetic aspects and apply our model to this system in the heating mode. The system ...


    By Inderscience Publishers

  • Sherwood Energy Village - case study

    Local community project harnesses heat pump technology to build a sustainable future. Sherwood Energy Village (SEV) is a former colliery site in the East Midlands. In 1994 following the colliery’s closure the local community tasked itself with bringing sustainable development into the mainstream. ENER-G’s low cost sustainable heat pump technologies provided the SEV with a local ...


    By ENER-G

  • Graphical exergy analysis of retrofitted distillation column

    Thermodynamic analysis of a distillation column has important role for synthesising and developing energy-efficient distillation process. We have invented representation of this analysis to integrate characteristics of separation performance and exergy features of internal distillation column using Material-Utilisation Diagram (MUD). In this paper, we analyse separation performance and exergy ...


    By Inderscience Publishers

  • Second law based performance analysis of seawater source cascade heat pump system: a case study

    This paper presents the second law based analysis of a seawater source cascade heat pump system operating with two different refrigerants. The present cascade heat pump system consists of two different heat pumps attached in such a way that the condenser of the first stage heat pump is the evaporator for the second heat pump and the condenser of the second heat pump is attached to the place to be ...


    By Inderscience Publishers

  • Comparative performance analysis for endoreversible simple air heat pump cycles considering ecological, exergetic efficiency and heating load objectives

    The performance analysis and optimisation of endoreversible simple air heat pump with constant-temperature heat reservoirs is carried out by using finite-time thermodynamics. The expressions of the heating load, the exergetic efficiency and the ecological function of the cycle are derived. The influences of the pressure ratio of the compressor and the allocation of heat exchanger inventory on the ...


    By Inderscience Publishers

  • Energy and exergy analysis of Hybrid Ground-Coupled Heat Pumps with hot water supply

    The energy and exergy efficiencies of a Hybrid Ground-Coupled Heat Pump (HGCHP) system with Domestic Hot Water (DHW) supply are analysed based on experimental study. Comparisons between the HGCHP and conventional DHW systems, i.e., Air Source Heat Pump (ASHP), Electric Heater (ElcH) and Gas-Fired Boiler (GasB), are made with respect to the energy and exergy efficiencies. The results show that the ...


    By Inderscience Publishers

  • Endoreversible thermodynamics approach for optimum oven operation

    This paper refers to the problem of how much heat is necessary for oven operation. An endoreversible thermodynamics approach is used here. More accurate upper bounds for the oven heat gain factor are obtained than when the traditional reversible thermodynamics approach is used. The optimum operation temperatures and the oven heat gain factor depend on three parameters incorporating both design ...


    By Inderscience Publishers

  • Energy and exergy analysis of an Automobile Heat Pump system

    This study deals with energy and exergy analysis of an Automobile Heat Pump (AHP) system using R134a as the working fluid and ambient air as a heat source. An experimental AHP system consisting of original components from an Automobile Air Conditioning (AAC) system and some extra equipment was developed and instrumented. The system was operated in steady state under various ambient and return air ...


    By Inderscience Publishers

  • Size considerations in applications of exergy analysis

    Considerations related to size of application of exergy analysis are examined. Six size categories are considered: sub-device, device, simple system, complex system, macro system, and planetary-scale system. The boundaries between categories are not sharp. It is concluded that many systems investigated with exergy analysis exhibit size-related trends regarding how exergy analysis is performed, ...


    By Inderscience Publishers

  • Thermodynamic analysis and multi-parametric optimisation of double effect absorption chiller

    A mathematical simulation model based on the mass and the energy balances as well as the second law, a thermodynamic analysis and a multi-parametric optimisation of an ammonia-water double effect absorption chiller are performed. Exergy analysis is performed to show how the double effect technique allows the reduction of the total exergy loss in the single effect machine and enhances its ...


    By Inderscience Publishers

  • Utilisation of air-groundwater exergy potential for improvement of the performance of heat pump systems

    This paper reports a study on the use of the non-flow air-groundwater exergy potential for improving heat pump performance. It is shown that for air/groundwater temperature differences of order 15°C, energy savings up to 50% may be expected for heat pumps operating either in the heating mode or in the cooling mode. It is also shown that the reduction in the energy required to drive the heat pump ...


    By Inderscience Publishers

  • Effect of heat transfer law on the ecological optimisation of a generalised irreversible Carnot heat pump

    The optimal exergy-based ecological performance of an irreversible Carnot heat pump with the losses of heat-resistance, heat leak and internal irreversibility, in which the transfer between the working fluid and the heat reservoirs obeys a generalised heat transfer law Q ∝ Δ (Tn), is derived by taking into account an ecological optimisation criterion (E) as the objective function, ...


    By Inderscience Publishers

  • Technical and economic analysis of gas-engine driven heat pump in China

    In this paper, the primary energy ratio and economic benefit of five different heating systems are analysed. The results show that the gas-engine heat pump system has the advantages of high primary energy efficiency and favours environmental protection in contrast to the other four heating systems. At the same time, to improve the economic benefit of the energy saving and environmental protection ...


    By Inderscience Publishers

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you