Št. zadetkov: 26
Izvirni znanstveni članek
Oznake:
eksergijsi izkoristek;nizko-temperaturni sistem daljinskega ogrevanja;booster;topla sanitarna voda;exergy efficiency;low-temperature district heating;sanitary hot water;
This paper presents an exergy-efficiency analysis of low-temperature district heating systems (DHSs) with different sanitary hot-water (SHW) boosters. The required temperature of the sanitary hot water (SHW) was set to 50 °C. The main objective of this study was to compare the exergy efficiencies of ...
Leto:
2019
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
eksergijski izkoristek;naprava za rekuperacijo toplote sive vode;sezonski hranilnik toplote;solarna toplotna črpalka;exergy efficiency;grey water heat recovery unit;seasonal heat storage;solar-assisted heat pump;
The main research objective of this paper was to compare exergy performance of three different heat pump (HP)-based systems and one natural gas (NG)-based system for the production of heating and cooling energy in a single-house dwelling. The study considered systems based on: 1. A NG and auxiliary ...
Leto:
2021
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
cevno-ploščni uparjalnik;prenos toplote;gospodinjski hladilnik;analitično modeliranje;numerična simulacija;skin evaporator;heat transfer;household refrigerator;analytical modelling;numerical simulation;
This paper presents a one-dimensional, steady-state, analytical and a two-dimensional, steady-state, numerical approach to describing heat transfer in the complex solid structure of a skin evaporator used in household refrigerators. Both models are based on a specific form of the energy equation (th ...
Leto:
2018
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
thermo-economic analysis;primary energy factor;emission analysis;district heating;simulations;heat pumps;
This paper presents the results of a thermo-economic (TE), primary-energy-factor and CO2-equivalent (CO2 (eq)), emissions-sensitivity analysis for the preparation of sanitary hot water (SHW) in fourth-generation district-heating systems. The annual required additional heat for the SHW provided by a ...
Leto:
2018
Vir:
Fakulteta za strojništvo (UL FS)
Kratki znanstveni prispevek
Oznake:
spectrally selective materials;sorption materials;radiative sky cooling;ventilation;cooling;heat pumps;desiccative heat pumps;energy efficiency;solar energy;sustainable energy source;
Leto:
2023
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
heat pumps;field tests;thermo-economic;primary energy factor;energy efficiency;
This paper presents the results of a thermo-economic and primary-energy-factor assessment based on the field-test results for a residential air-to-water heat pump (AWHP). The AWHP experimental setup consisted of a supervisory control and data-acquisition system, which was connected to a heat meter, ...
Leto:
2017
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
thermal management;heat exchangers;heat pipes;extended surfaces;CFD simulations;optimization methodology;
This paper presents an experimental and numerical heat transfer analysis of heat-pipe-based CPU coolers and a performance optimization methodology. The first part of the study focuses on the performance of two commercial HP-based CPU coolers under inclination angles of 0°, 90° and 180°. The results ...
Leto:
2020
Vir:
Fakulteta za strojništvo (UL FS)
Kratki znanstveni prispevek
Oznake:
prezračevanje;hlajenje;sorpcijska sredstva;energetska učinkovitost;air-conditioning;cooling;sorbent materials;energy efficiency;
Humidity’s impact on current and future greenhouse gas emissions associated with air conditioning has been shown in a recent issue of Joule. Here, we highlight challenges and opportunities in the utilization of advanced solid hygroscopic dehumidification materials for efficient cooling in next-gener ...
Leto:
2022
Vir:
Fakulteta za strojništvo (UL FS)
Kratki znanstveni prispevek
Oznake:
sorpcijska sredstva;obnovljivi viri energije;energija sonca;atmosfersko pridobivanje vode;optimizacija delovanja;fotovoltaika;izraba odpadne toplote;sorption materials;renewable energy sources;solar energy;atmospheric water harvesting;performance optimization;photovoltaics;waste heat utilization;
Leto:
2024
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
koeficient toplotne prestopnosti;Wilsonova metoda;prenosnik toplote;orebrene cevi;convective heat-transfer coefficient;corrugated tubes;wilson-plot method;heat exchanger;
This paper presents a study of the thermal characteristics of a concentric-tube heat exchanger that is a key element in local ventilation device. The inner tube of the concentric-tube heat exchanger has a sinusoidal, wavy surface in the longitudinal direction, which enables heat-transfer enhancement ...
Leto:
2013
Vir:
Fakulteta za strojništvo (UL FS)