Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups [CPC: F28D17/00] or [CPC: F28D19/00] using latent heat {with different heat storage materials not coming into direct contact}
Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups [CPC: F28D17/00] or [CPC: F28D19/00] using latent heat {with different heat storage materials not coming into direct contact}