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The recovery of condenser heat in air conditioners is attractive because of its great economy and environmental value. This work experimentally studies a modified air conditioner with a domestic hot water supply (ACDHWS) that operates in the space-cooling and water-heating mode. The working principles and the basic features of the ACDHWS are introduced in this paper. This is followed by an experimental...
The advanced static VAR compensator (ASVC) device is now recognized as one of the most important Flexible Alternating Current Transmission Systems (FACTS) devices. It has been proven that the mid-point of a transmission line is the optimal location for some FACTS devices or reactive power support, and the proof is based on the linear load, which is not valid practically. The validity of the optimal...
Four different thermo-economic techniques for optimum design of hot water piping systems are presented. They are as follows: the first one is a sequential optimization of pipe diameter based on minimization of total cost without considering heat losses and then of insulation thickness based on minimization of cost of insulation and heat losses. The second is simultaneous optimization of pipe diameter...
This study considers both the internal and external costs of the utility in deriving the avoided capacity cost (ACC) and the avoided operating cost (AOC) induced in the power system in Taiwan (Taipower) caused by the implementation of load management (LM) program. The ACC comprises the avoided generation cost and the avoided network capacity cost. Meanwhile, the AOC is calculated by considering the...
California's pacific coast stretches roughly over 11.5 latitudinal degrees, extending from about 32.5°N to 44°N. There is nearly 900nm of California coastline offering superior opportunity for wave energy use. The longitudinal position of the coast shifts eastward at two distinct locations: Punta Gorda just south of Cape Mendecino in the north and Point Conception in the south. The change in longitudinal...
The convective and microwave-convective drying of garlic cloves was carried out in a laboratory scale microwave dryer, which was developed for this purpose. The specific energy consumption involved in the two drying processes was estimated from the energy supplied to the various components of the dryer during the drying period. The specific energy consumption was computed by dividing the total energy...
Four processes for small-scale liquefied natural gas (LNG) production are evaluated. These include a single-stage mixed refrigerant (SMR), a two-stage expander nitrogen refrigerant and two open-loop expander processes. Steady-state simulations were undertaken to ensure that each process was compared on an identical basis, was fully optimised and was in agreement with published results. Composite curves...
This paper presents the results of plant-site experiments conducted on several natural-gas-fired, reverberatory aluminum furnaces to evaluate overall energy efficiency and to analyze major sources of heat loss, providing an overall picture of current aluminum melting furnaces in the US aluminum industry. Thermodynamic analyses were done for energy utilization according to energy balance and compared...
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