Finland has approximately 150,000 oil-heated private homes. In 2020, the Finnish government launched subsidies for homeowner energy renovations. this study, we examine impact of two new renovation subsidies, ELY grant and ARA grant, from an efficiency point view. Data these reveal that a typical case is building 1970s where oil boiler replaced with air-to-water heat pump. With additional data E...

Cavitation is one of the most well-known process faults that may occur in different industrial equipment especially centrifugal pumps. Cavitation also may happen in water pumps and turbines. Sometimes cavitation has been severe enough to wear holes in the impeller and damage the vanes to such a degree that the impeller becomes very ineffective. More commonly, the pump efficiency will decrease s...

One remaining issue of CO2 processes are problems in connection with the lubrication oil. The objective of this project is to prove the feasibility of a small oil free semi hermetic piston type CO2-compressor for supercritical heat pump applications with large temperature spans. These processes involve high pressures like 35 bar suction pressure and 80 to 150 bar delivery pressure. A functional...

Liquid sloshing is a common industrial problem affecting not only the dynamics of flow inside the container, but also of the downstream systems being fed from the container. This paper deals with the application of Computational Fluid Dynamics (CFD) for analyzing the possible effect of oil sloshing in compressors used in underground rail application on the continuous supply of lubricant to the ...

A new low-cost design for a free-piston Stirling engi ne driven heat pump is presented. The new approach uses a linear-acting magnetic coupling to transfer engine power across a hermetic shell. Camp l i ance in the coupling affects the performance and stability of the system, especially with regard to matchin g the engine dynamics to the compressor load. This paper first describes test results ...

Monospecific antibodies to the calcium transport enzyme (alpha-Ca pump) inhibit mitosis when microinjected into sand dollar embryos. Immunoglobulins were raised against the calcium transport enzyme (Ca pump) of sarcoplasmic reticulum (SR) from rat skeletal muscle and guinea pig ileum smooth muscle. Specific antibodies were further isolated from IgG fractions by using electrophoretically purifie...

A multi-connected air-conditioning system having one outdoor unit and four indoor units, with 5 HP constant speed scroll compressor paralleled with 4 HP frequency inverter scroll compressor, was developed. Many experiments were taken under different working conditions and different system parameters. The performances and the operating characteristics were obtained. The oil-back ability was vali...

To extract all the oil from a well, petroleum engineers pump hot reactive chemicals into the well. These Enhanced Oil Recovery (EOR) processes need to be thoroughly monitored, since the injected fluids can seep out of the production oil wells and, if unchecked, eventually pollute sources of drinking water. There is a need to measure the corresponding effects. One way to measure these undergroun...

The objective of this article is to find the optimal trajectory of a pumping ship, used to clean oil spots in the open sea, in order to pump the maximum quantity of pollutant on a fixed time period. We use a model previously developed to simulate the evolution of the oil spots concentration due to the coupling of diffusion, transport from the wind, sea currents and pumping process and reaction ...