1) sensible heat (e.g., chilled water/fluid or hot water storage), 2) latent heat (e.g., ice storage), and 3) thermo-chemical energy. 5. For CHP, the most common types of TES are sensible heat and latent heat. The following sections are focused on Cool TES, which utilizes chilled water and ice storage. Several companies have commer-
Energy and exergy analysis of two novel hybrid solar photovoltaic geothermal energy systems incorporating a building integrated photovoltaic thermal system and an earth air heat exchanger system Solar Energy, 188 ( 2019 ), pp. 83 - 95, 10.1016/j.solener.2019.05.080
Compared with the conventional air conditioner, cold storage air conditioning has an additional energy storage tank, which is connected to both the evaporator and heat exchanger in parallel. The principle diagrams of the two systems are shown in Fig. 1, Fig. 2. For the technology of cool storage air conditioning, electric …
cooling, domestic water heating, or a combination of these functions and may also include the functions of liquid circulation, thermal storage, air circulation, air cleaning, dehumidifying, or humidifying. A GHP system generally consists of one or more GHP models, the ground heat exchanger(s), the air and/or hydronic space conditioning
Schematic of the thermal energy storage device for air conditioning (HTF: heat transfer fluid) [85]. Dolado et al. [ 86 ] modelled the thermal behaviour of a PCM–air heat exchanger for a solar cooling system which aimed to increase the COP (coefficient of performance) of the absorption chillers.
Schematic of the thermal energy storage device for air conditioning (HTF: heat transfer fluid) [85]. Dolado et al. [ 86 ] modelled the thermal behaviour of a PCM–air heat exchanger for a solar cooling system which aimed to increase the COP (coefficient of performance) of the absorption chillers.
Thermal energy storage is considered as a proven method to achieve the energy efficiency of most air conditioning (AC) systems. Technologies for cold storage were also considered and the experience gained in USA and Canada summarized, with a conclusion made that cold storage technologies could be successfully used for AC in …
The computer simulation and working fluid selection of a heat pipe heat exchanger (HPHE) system appropriate for both heating and cooling modes in air conditioning applications are performed in this article. 15. Engineering Science Data Unit (ESDU). High-fin ...
Compared with the conventional air conditioner, cold storage air conditioning has an additional energy storage tank, which is connected to both the evaporator and heat exchanger in parallel. The principle diagrams of the two systems are shown in Fig. 1, Fig. 2.
In this paper, a novel central air-conditioning system with an internal heat exchanger is proposed and analyzed for its energy-saving effect. Two frequently used systems are chosen as the reference systems, i.e., a conventional system with a sensible heat exchanger (Reference System I) and a conventional system with a total heat …
Latent heat-based energy storage systems provide a convenient way of storing energy when it is adequately available for waste energy recovery, and supply the same during the requirement. The stored energy may be used for domestic and agro-industrial applications such as space heating, air-conditioning systems, and drying …
A heat exchanger is exactly what the name implies, a device used to transfer (exchange) heat or thermal energy. Heat exchangers are either given a hot fluid to provide heating or a cold fluid to provide cooling. A fluid can be either a liquid or a gas. Heat always flows from hot to cold.
Heat pumps offer an energy-efficient alternative to furnaces and air conditioners for all climates. Like your refrigerator, heat pumps use electricity to transfer heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. During the heating season, heat pumps move heat from the cool outdoors into your warm ...
In this paper, the unsteady effect of a heat exchanger for cold energy storage (Hex-CES 1) in a liquid air energy storage system is studied. The numerical model of the unsteady flow and heat transfer in Hex-CES 1 is established, and two methods to reduce the unsteady effect are put forward.
The rapid increase in cooling demand for air-conditioning worldwide brings the need for more efficient cooling solutions based on renewable energy. Seawater air-conditioning (SWAC) can provide base-load cooling services in coastal areas utilizing deep cold seawater. This technology is suggested for inter-tropical regions where …
Technology Description. TES technologies are often grouped into three categories: 1) sensible heat (e.g., chilled water/fluid or hot water storage), 2) latent heat (e.g., ice storage), and 3) thermo-chemical energy. 5. For CHP, the most common types of TES are sensible heat and latent heat.
This study experimentally investigates the using of a triplex tube heat exchanger (TTHX) with PCM in the middle tube as the thermal energy storage to power a liquid desiccant air-conditioning system. Four longitudinal fins were welded to each of the inner and middle tubes as a heat transfer enhancement in the TTHX to improve the …
Cut-away image above shows the titanium heat exchanger core. Because titanium can be difficult to work with, copper stubs are attached to the titanium coil at the factory in order to simplify installation. FPH5LF. HotSpot Energy titanium pool heat exchanger systems provide free pool heating by recovering wasted heat from your air conditioner.
Latent heat storage (LHS) is characterized by a high volumetric thermal energy storage capacity compared to sensible heat storage (SHS). The use of LHS is found to be more competitive and attractive in many applications due to the reduction in the required storage volume [7], [8] .
From the previous literature review, it is observed that HPHX is a good technology to reduce energy cost and CO2 emission for air–air heat exchangers when air–water heat exchanger is impossible. Using HPHX in AC units has an additional two important benefits; no cross-contamination between isolated airstreams and no moving …
Rijksen et al. [52] investigated the energy performance of the thermally activated building floor integrated with GHEs, aiming to reduce the energy consumption of the air-conditioning system. By activating the building thermal mass with cool water from the GHE at night, the electricity consumption of the air-conditioning system during …
Keywords: cold and thermal energy storage; water chiller; heat exchanger; energy-saving; air conditioning; phase-change materials 1. Introduction Cold and thermal energy storage technology is one of the most effective methods with which to solve the problems of energy shortage and environmental pollution all over the world.
The rejected heat from air-conditioning equipment consists of sensible and latent heat, in which sensible heat accounts for about 15–20% of the total exhausting heat [34]. Gu et al. [35] (China) designed a heat recovery system consisting of two different PCM accumulators installed in series before the condenser of an air-conditioning device …
This paper presents the economic performance evaluation of a novel solar-assisted absorption air conditioning system integrated with absorption energy storage (AES). The proposed solar-assisted air conditioning system consists of a parabolic trough solar collector (PTC), parallel-flow double-effect water-lithium bromide (H 2 …
DOI: 10.1016/J.ENBUILD.2017.10.051 Corpus ID: 116810423 Experimental investigation of double-pipe heat exchangers in air conditioning applications @article{Ghani2018ExperimentalIO, title={Experimental investigation of double-pipe heat exchangers in air conditioning applications}, author={Saud Ghani and Seifelislam …
Heat pipes are very flexible systems with regard to effective thermal control. They can easily be implemented as heat exchangers inside sorption and vapour-compression heat pumps, refrigerators and other types of heat transfer devices. Their heat transfer coefficient in the evaporator and condenser zones is 10 3 –10 5 W/m 2 K, heat …
The energy flow density of soil is small, 20–40W/m 2, generally 25W/m 2. This determines that when the soil is only used as the low-level heat source of the heat pump, its load should not be too large. Generally, it is only used when the load is no more than 1 MW. In addition, ground source heat pump has certain area requirements.