The paper presents the results of study temperature regime optimization for storing seeds tropical orchids on example Eulophia streptopetala Lindley and Stanhopea tigrina Batem ex Lindl. Mature were frozen at temperatures 18C, 40C or 80C a period 1, 3, 6 12 months, storage was +4C. Before after freezing, viability determined by visual tetrazole methods. After defrosting, sown plants grown from ...

Fin-and-tube heat exchangers have been extensively used in many fields, especially heat, ventilation, air-conditioning, and refrigeration systems. In the case of operation a fin-and-tube exchanger as an air cooler, frost formation is important effect that should be taken into account. The accumulation process undesirable since it deteriorates transfer due to insulation layer well causing excess...

The objective of this paper is to optimize defrost/demist performance in a vehicle. However, to initiate the problem, it is necessary to have a thorough understanding of flow behavior within the compartment. So a full-scale model of passenger compartment has been modeled and the air stream from very near to the windshield up to back of the compartment has been analyzed applying computational fl...

Solar assisted air source heat pump shows great potential as a promising energy-saving heating technology, which integrates solar collector and pump. It is widely considered for supplying hot water, space and/or cooling in the domestic sector. The performance of pumps can be evaluated system level by parameters such coefficient performance, seasonal factor, energy consumption, fraction well ini...

Frost deposits on the outdoor heat exchanger of an air source pump (ASHP) conditioner and reduces its capacity during winter operation. However, prevailing reverse-cycle defrosting (RCD) turns indoor into evaporator ceases supply to living space. Consequently, thermal comfort for occupants is deteriorated. This article proposes a heater-assisted ASHP tackle this problem. With 800 W electromagne...

This paper will present the structure of the new system, the control scheme and its performance test results. In this new system, the damper in the conventional refrigerator is replaced by an additional cooling fan Thus, it uses two cooling fans: one (F-fan) is to provide cooled air for freezing compartment (F-compartment) and the other (R-fan) is for refrigerating compartment (R-compartment), ...