Water source heat pumps are increasingly being used for residential
and commercial space heating. Typically, these heat pumps are capable
of both heating and cooling, and historically the design emphasis
has been on improving the units' cooling performance. Recently,
there has been more interest in improving the heating performance,
however,...
When the ambient temperature drops, air-source heat
pumps deliver less heating per unit of power input and
usually cannot provide for the heating load. Therefore,
dual-source heat pumps can offer an attractive alternative.
In the context of this work, a dual-source heat pump
operates as an air-source unit under normal...
Water-source and ice-maker heat pumps share many
characteristics. However, each presents different
technical difficulties that have prevented them from being
used more widely. In a water-source heat pump a very
important consideration is to reduce water consumption,
while in an ice-maker heat pump a major concern is to
reduce the...
The use of the conventional air-source heat pump for residential
space conditioning has increased dramatically over the past decade.
Historically these units have been designed as air conditioners which
could also be used to provide heating. However, for the climatic
region of the Western Pacific Northwest (the geographic region west...
The problems of freezing and melting present special
mathematical complexity and, except for the most elementary
one-dimensional cases, require a numerical solution.
However, these problems have a growing importance in
engineering problems because of their application to
metallurgical operations, food preservation, heating and
air conditioning, etc.
In the present work,...
A key requirement within many microsystem devices is the ability for rapid mixing and gas-liquid
absorption. In the past, qualitative results have suggested that micro-manufactured straight-through
pores can significantly reduce the pressure drop for gas diffusion across a gas-liquid contactor as
compared to the complicated and tortuous flow paths encountered...
Miniature energy and chemical systems (MECS) are miniature thermal, fluid, and chemical devices in the mesoscale size range between a sugar cube and a human fist. MECS take advantage of improved rates of mass and heat transfer that have been observed at the microscale. There are many potential applications for...
