The phrase "an economical solution" is correct and usable in written English.
You can use it when referring to a solution that is cost-effective or provides good value for money.
Example: "After reviewing several options, we concluded that implementing solar panels would be an economical solution for reducing our energy costs."
Alternatives: "a cost-effective solution" or "a budget-friendly option."
And modular design, though often viewed as an economical solution, has sometimes met with disdain.
It was an economical solution that looked chic instead of cheap, largely because of Mr. Phuah's exacting craftsmanship.
In modern times, the suspension bridge provided an economical solution to the problem of long spans over navigable streams or at other sites where it is difficult to found piers in the stream.
Farmers may have built round barns because they "believed there was something sacred in that shape," as explained by William Kimball (front page, Jan . 17, but let's not forget that in the late 1800's agricultural experts promoted round barns as an economical solution to barn design.
The use of agricultural and food by-products is an economical solution to industrial biotechnology.
However, it is not an economical solution, especially when the amount of interconnected DG is small.
Here there was a home debut for Emile Heskey; no great replica shirt seller, just an effective, economical solution to a problem position.
The reported results shed light to a more economical solution, which entails a decrease in atmospheric emissions and offers an even higher reliability than traditional systems.
Therefore, this is an excellent, economical solution for us all.
The analytical solution by the two-scale perturbation analysis with modifications up to the second order is shown to be a most economical solution to give a reasonably good prediction.
A more economical solution would be to find a used Mini or a cheap PC as long as the device has an HDMI out port.
