Heat pump or gas furnace, which is best? Get your HVAC facts from the pros & bust the 8 major myths before comparing & choosing heat pumps for the home.
Experimental research has been carried out on water-to-water heat pump driven by natural gas engine under different operating and speed conditions by advanced testing means.The results show that the Primary Energy Ratio(PER)of the system is about 1.13～1.79 under the experimental conditions and the...
A CO2 heat pump water heater (HPWH) can provide hot water with a relatively high COP and consume significantly less energy than all electric or gas water heaters. This study reviews and analyses the existing CO2 HPWHs both in industrial and residential sectors, where the low-temperature and ...
Huang Dong;Li Quanxu;Yuan Xiuling.Comparison between hot-gas bypass defrosting and reverse-cycle defrosting methods on an air-to-water heat pump.Applied Energy.2009.1697-1703Dong Huang,Quanxu Li,Xiuling Yuan.Comparisonbetween hot-gas bypass defrosting and reverse-cy-cle defrosting methods on an ...
The dynamic simulation of hot-gas defrost is a challenge and necessary to the simulation of a heat pump. A defrost model that bases itself on the fundamental conservation equations and experimental results is presented in this paper. The distributed model is used here for the details of evaporato...
GSHP Ground Source Heat Pump GWHP Groundwater Heat Pump SI Sensitivity Index Latin Letters b saturated thickness of the aquifer (m) 𝐷𝑥Dx, 𝐷𝑦Dy, 𝐷𝑧Dz thermal dispersion coefficient, respectively in the 𝑥x, 𝑦y, 𝑧z direction (m2/s) d thickness of the vadose zone—wa...
Heat pumps are a lot more efficient when they run in combination with systems like underfloor heating or very large, specially designed oversized radiators that produce enough heat to warm the space without needing to run at hot temperatures. Where a heat pump is installed to replace a gas boil...
Inside the ground source heat pump, you will find an evaporator, compressor and condenser. After the water is pumped back out of the ground, they then further increase the temperature of the water using the compressor unit, and this heated water then flows into your home's heating system. ...
Velocity detection method in gas engine driven heat pump; 一种燃气机热泵速度检测方法 2. An energy calculation model is established for the gas engine driven heat pump based on the experiment of components. 在对燃气机热泵部件进行实验的基础上,建立了燃气机热泵系统能耗计算模型。 3. The thermodyna...
Performance of a gas engine-driven heat pump system with R410A for cooling and domestic hot water applications 2023, International Journal of Refrigeration Citation Excerpt : When the engine is at high speed, the effect of ηeng is less than COP, and PER tends to decrease. If we did not ...